From nso01r ecs.soton.ac.uk Wed Sep 1 00:07:16 2004 From: nso01r ecs.soton.ac.uk (Noor Othman) Date: Tue Aug 31 18:19:46 2004 Subject: [Mp4-tech] Global gain parameter in AAC Message-ID: <4134F694.10301@ecs> Hi, Can anyone help me, why do I find that the 2nd bit of global gain, is the most sensitive bit, and it's not the 1st bit? Or did I get it wrong? In other words, it should be the 1st bit which is the most sensitive bit. I wonder if the MSB of that parameter is the first bit or not. Regards, Noor From kothari iitb.ac.in Wed Sep 1 16:08:24 2004 From: kothari iitb.ac.in (Abhishek D Kothari) Date: Wed Sep 1 05:38:47 2004 Subject: [Mp4-tech] How to Packetize multiple layered MPEG4 video Message-ID: <33039.10.8.1.67.1094031504.squirrel@gpo.iitb.ac.in> Is there any software which can create a single mp4 file from temporal scalable MPEG4 video. I have two layers of video which I need to stream simultaneously. How do I do that? Regards, Abhishek From mrukant.popat rediffmail.com Wed Sep 1 11:09:34 2004 From: mrukant.popat rediffmail.com (MRUKANT POPAT) Date: Wed Sep 1 06:09:37 2004 Subject: [Mp4-tech] writing elementary stream as MP4 file on disk Message-ID: <20040901100930.3535.qmail@webmail18.rediffmail.com> An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040901/1033e4c2/attachment.html -------------- next part -------------- hi community, presently I am working on mp4 encoder. my job is to accept mp4 encoded audio and video elementary streams and write it to disk as an MP4 file. my query:- when I claim that I am writing an MP4 file to disk, does it mean that it has to adhere to MP4 file structure in 14496-1 (chapter 13) and 14496-14(MP4 file format). Or should it adhere to ISO Base Media File format as specified in 14496-12. regards, MRUKANT From koumaras iit.demokritos.gr Wed Sep 1 14:21:38 2004 From: koumaras iit.demokritos.gr (Harilaos G. Koumaras) Date: Wed Sep 1 06:27:22 2004 Subject: [Mp4-tech] Scalable MPEG4 Coding Message-ID: <012201c4900d$7794c6b0$cd04e98f@HARIS> Hi, Can anyone provide me some information redarding a software encoder for scalable coding of MPEG4? I am looking for a full implemantation, encoder and player. Thank you Haris -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040901/2c436ce2/attachment.html From Juha-Pekka.Kotiranta goodmood.fi Wed Sep 1 15:13:19 2004 From: Juha-Pekka.Kotiranta goodmood.fi (Juha-Pekka Kotiranta) Date: Wed Sep 1 07:21:07 2004 Subject: [Mp4-tech] Scalable MPEG4 Coding Message-ID: <1952F320124722438A5A946FA264D4FC7B1345@kalenteri.goodmood.network> Hello I am also intrested about this issue if any information awailable Best Regards JP Kotiranta +358408309478 -----Original Message----- From: mp4-tech-bounces@lists.mpegif.org [mailto:mp4-tech-bounces@lists.mpegif.org] On Behalf Of Harilaos G. Koumaras Sent: 1. syyskuuta 2004 13:22 To: mp4-tech@lists.mpegif.org Subject: [Mp4-tech] Scalable MPEG4 Coding Hi, Can anyone provide me some information redarding a software encoder for scalable coding of MPEG4? I am looking for a full implemantation, encoder and player. Thank you Haris -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040901/5d836b80/attachment.html From gedrozia yahoo.com Wed Sep 1 06:13:04 2004 From: gedrozia yahoo.com (Mehdi Sharifi) Date: Wed Sep 1 08:19:36 2004 Subject: [Mp4-tech] quickTime Tracer In-Reply-To: <012201c4900d$7794c6b0$cd04e98f@HARIS> Message-ID: <20040901121304.19107.qmail@web41605.mail.yahoo.com> Hi all, I need a tool to trace a quickTime file for it's chunks and samples ; can anyone of you help me ? thanks beforehand --- mehdi --------------------------------- Do you Yahoo!? Win 1 of 4,000 free domain names from Yahoo! Enter now. -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040901/35b0838e/attachment.html From sudeep_mpeg yahoo.com Wed Sep 1 00:28:36 2004 From: sudeep_mpeg yahoo.com (sudeep hegde) Date: Wed Sep 1 09:11:22 2004 Subject: [Mp4-tech] [Audio] About BSAC Conformance Test Streams Message-ID: <20040901062836.12948.qmail@web61201.mail.yahoo.com> hi ravikiran, I am also working on bsac decoder and i am finding it difficult to get the bitstreams, can you plz send me the link where the bsac streams are available. thanx in advance regards, sudeep --------------------------------- Do you Yahoo!? Yahoo! Mail Address AutoComplete - You start. We finish. -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040831/6813ee31/attachment.html From sudeep_mpeg yahoo.com Wed Sep 1 00:33:37 2004 From: sudeep_mpeg yahoo.com (sudeep hegde) Date: Wed Sep 1 09:13:02 2004 Subject: [Mp4-tech] Need BSAC encoded Audio data Message-ID: <20040901063337.14107.qmail@web61201.mail.yahoo.com> Hi sanjay, I have listed some of the input options for the bsac encoder and decoder can you send me a link where bsac streams are available in the iso site and i want to know whether your bsac decoder is working. regards, sudeep Encoding to fl4 (48 kHz mono @ 64 kbits/s) $MP4AUDVM/mp4auenc -d 1 -m tf -r 64000 -c "-aac_sys_bsac" ${TESTDIR}/m48.au -o ${TESTDIR}/m48_bsac64.fl4 Encoding to fl4 (48 kHz stereo @ 128 kbits/s) $MP4AUDVM/mp4auenc -d 1 -m tf -r 128000 -c "-aac_sys_bsac" ${TESTDIR}/s48.au -o ${TESTDIR}/s48_bsac128.fl4 Decoding of fl4 (using all layers) $MP4AUDVM/mp4audec -d 1 -aaceof -c "-mp4ff" ${TESTDIR}/m48_bsac64.fl4 -o ${TESTDIR}/m48_bsac64.au $MP4AUDVM/mp4audec -d 1 -aaceof -c "-mp4ff" ${TESTDIR}/s48_bsac128.fl4 -o ${TESTDIR}/s48_bsac128.au $MP4AUDVM_REWRITE/mp4audec -d 1 ${TESTDIR}/m48_bsac64.fl4 -o ${TESTDIR}/m48_bsac64.au $MP4AUDVM_REWRITE/mp4audec -d 1 ${TESTDIR}/s48_bsac128.fl4 -o ${TESTDIR}/s48_bsac128.au Decoding of fl4 (using only base layer) $MP4AUDVM/mp4audec -d 1 -aaceof -c "-mp4ff -bsacDecLyr 0" ${TESTDIR}/m48_bsac64.fl4 -o ${TESTDIR}/m48_bsac64.au $MP4AUDVM/mp4audec -d 1 -aaceof -c "-mp4ff -bsacDecLyr 0" ${TESTDIR}/s48_bsac128.fl4 -o ${TESTDIR}/s48_bsac128.au $MP4AUDVM_REWRITE/mp4audec -d 1 -maxl 0 ${TESTDIR}/m48_bsac64.fl4 -o ${TESTDIR}/m48_bsac64.au $MP4AUDVM_REWRITE/mp4audec -d 1 -maxl 0 ${TESTDIR}/s48_bsac128.fl4 -o ${TESTDIR}/s48_bsac128.au Conversion to mp4 $MP4AUDVM/fl4_to_mp4 -d 1 ${TESTDIR}/m48_bsac64.fl4 -o ${TESTDIR}/m48_bsac64.mp4 $MP4AUDVM/fl4_to_mp4 -d 1 ${TESTDIR}/s48_bsac128.fl4 -o ${TESTDIR}/s48_bsac128.mp4 Decoding of mp4 (using all layers) $MP4AUDVM/mp4audec -d 1 -c "-mp4ff" ${TESTDIR}/m48_bsac64.mp4 -o ${TESTDIR}/m48_bsac64.au $MP4AUDVM/mp4audec -d 1 -c "-mp4ff" ${TESTDIR}/s48_bsac128.mp4 -o ${TESTDIR}/s48_bsac128.au $MP4AUDVM_REWRITE/mp4audec -d 1 ${TESTDIR}/m48_bsac64.mp4 -o ${TESTDIR}/m48_bsac64.au $MP4AUDVM_REWRITE/mp4audec -d 1 ${TESTDIR}/s48_bsac128.mp4 -o ${TESTDIR}/s48_bsac128.au Decoding of mp4 (using only base layer) $MP4AUDVM/mp4audec -d 1 -c "-mp4ff -bsacDecLyr 0" ${TESTDIR}/m48_bsac64.mp4 -o ${TESTDIR}/m48_bsac64.au $MP4AUDVM/mp4audec -d 1 -c "-mp4ff -bsacDecLyr 0" ${TESTDIR}/s48_bsac128.mp4 -o ${TESTDIR}/s48_bsac128.au $MP4AUDVM_REWRITE/mp4audec -d 1 -maxl 0 ${TESTDIR}/m48_bsac64.mp4 -o ${TESTDIR}/m48_bsac64.au $MP4AUDVM_REWRITE/mp4audec -d 1 -maxl 0 ${TESTDIR}/s48_bsac128.mp4 -o ${TESTDIR}/s48_bsac128.au --------------------------------- Do you Yahoo!? Y! Messenger - Communicate in real time. Download now. -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040831/54d48824/attachment-0001.html From azaka abo.fi Wed Sep 1 17:58:59 2004 From: azaka abo.fi (Asim Pervez Zaka) Date: Wed Sep 1 10:11:01 2004 Subject: [Mp4-tech] Scalable MPEG4 Coding In-Reply-To: <1952F320124722438A5A946FA264D4FC7B1345@kalenteri.goodmood.network> References: <1952F320124722438A5A946FA264D4FC7B1345@kalenteri.goodmood.network> Message-ID: <1094047139.4135d5a32bf31@webmail.abo.fi> Hi, Did you try FFMPEG codec and FFPLAY for playing back? You can get a full Momusys C implementation too from the net. BR Asim. Quoting Juha-Pekka Kotiranta : > Hello > > > > I am also intrested about this issue if any information awailable > > > > Best Regards > > > > JP Kotiranta > > +358408309478 > > > > -----Original Message----- > From: mp4-tech-bounces@lists.mpegif.org > [mailto:mp4-tech-bounces@lists.mpegif.org] On Behalf Of Harilaos G. > Koumaras > Sent: 1. syyskuuta 2004 13:22 > To: mp4-tech@lists.mpegif.org > Subject: [Mp4-tech] Scalable MPEG4 Coding > > > > Hi, > > > > Can anyone provide me some information redarding a software encoder > for > scalable coding of MPEG4? I am looking for a full implemantation, > encoder and player. > > > > Thank you > > > > Haris > > -- Asim Pervez Zaka, ?bo Akademi, Embedded Systems Lab, Room Number 4416, Datacity B building 4th Floor, Turku, Finland. +358 (0)41 4865710 asim_zaka@yahoo.com From chandra.sekhar samsung.com Wed Sep 1 20:45:46 2004 From: chandra.sekhar samsung.com (Chandra Sekhar Reddy G.) Date: Wed Sep 1 10:23:16 2004 Subject: [Mp4-tech] writing elementary stream as MP4 file on disk In-Reply-To: <20040901100930.3535.qmail@webmail18.rediffmail.com> Message-ID: <001e01c4902e$2d90dba0$1d466c6b@sisodomain.com> Hi, In my opinion, it *must* be in MP4-File-Format. MP4-File-Format is derived from ISO-Base-Media-File-Format. MP4-File-Format has some extensions to ISO-Base-Media-File-Format, and these extensions are required to put mpeg-elementary streams. Regards, Chandra -----Original Message----- From: mp4-tech-bounces@lists.mpegif.org [mailto:mp4-tech-bounces@lists.mpegif.org] On Behalf Of MRUKANT POPAT Sent: Wednesday, September 01, 2023 3:40 PM To: mp4-tech@lists.mpegif.org Subject: [Mp4-tech] writing elementary stream as MP4 file on disk hi community, presently I am working on mp4 encoder. my job is to accept mp4 encoded audio and video elementary streams and write it to disk as an MP4 file. my query:- when I claim that I am writing an MP4 file to disk, does it mean that it has to adhere to MP4 file structure in 14496-1 (chapter 13) and 14496-14(MP4 file format). Or should it adhere to ISO Base Media File format as specified in 14496-12. regards, MRUKANT -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040901/60d88ebc/attachment.html From relkhater ssai.us Wed Sep 1 16:42:21 2004 From: relkhater ssai.us (Ramzi Elkhater) Date: Wed Sep 1 18:54:52 2004 Subject: [Mp4-tech] audio reference software Message-ID: <4136504D.3090108@ssai.us> Hello All, I donwloaded the mp4 audio reference software from the the following link, http://isotc.iso.ch/livelink/livelink/fetch/2000/2489/Ittf_Home/ITTF.htm I'm trying to compile the natural audio codecs under windows using Visual C. In the win32/readme.txt file it says to add the file libisomp4.lib to the /lib directory. However, when I compile the project in the systems/mp4_file_format directory that comes from the same link I end up with libisomedia.lib and not libisomp4.lib :( Does anyone know the difference between the 2 files? From behin1 yahoo.com Wed Sep 1 18:32:26 2004 From: behin1 yahoo.com (Mohsen) Date: Wed Sep 1 20:41:38 2004 Subject: [Mp4-tech] (no subject) Message-ID: <20040902003226.64556.qmail@web41410.mail.yahoo.com> Hi everybody, I use ffmpeg to encode a video, I want to see the effect of packet loss. I used UDP to packetize and then i delete some packets. The problem is now that if I decode using ffmpeg, there will be great loss of all frames in GOP. Does anybody now how i can implement a simple error concelment method? _______________________________ Do you Yahoo!? Win 1 of 4,000 free domain names from Yahoo! Enter now. http://promotions.yahoo.com/goldrush From bobocreative yahoo.com.cn Thu Sep 2 02:44:53 2004 From: bobocreative yahoo.com.cn (Woo John) Date: Thu Sep 2 04:55:55 2004 Subject: [Mp4-tech] Where can I find any DVB test bitstreams? Message-ID: <20040902084453.86343.qmail@web15608.mail.cnb.yahoo.com> Hi all, Where can I find any DVB test bitstreams? I need some captured DVB bitstreams with MPEG-2 video and auduio for conformance test. Thanks in advance. ===== Zilong Wu bobocreative@yahoo.com.cn __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com From rob.koenen mpegif.org Thu Sep 2 13:25:29 2004 From: rob.koenen mpegif.org (Rob Koenen (MPEGIF)) Date: Thu Sep 2 18:42:48 2004 Subject: [Mp4-tech] Where can I find any DVB test bitstreams? In-Reply-To: <20040902084453.86343.qmail@web15608.mail.cnb.yahoo.com> Message-ID: <002601c4913b$c4b96980$e9967343@corp.intertrust.com> I think the appropriate forum for this question is DVB ... Please see www.dvb.org and http://www.dvb.org/index.php?id=34 Best - Rob > -----Original Message----- > From: mp4-tech-bounces@lists.mpegif.org > [mailto:mp4-tech-bounces@lists.mpegif.org] On Behalf Of Woo John > Sent: Wednesday, 1 September 2023 22:45 > To: mp4-tech@lists.mpegif.org > Subject: [Mp4-tech] Where can I find any DVB test bitstreams? > > > Hi all, > Where can I find any DVB test bitstreams? I need > some captured DVB bitstreams with MPEG-2 video and > auduio for conformance test. > Thanks in advance. > > > ===== > Zilong Wu > bobocreative@yahoo.com.cn > > __________________________________________________ > Do You Yahoo!? > Tired of spam? Yahoo! Mail has the best spam protection around > http://mail.yahoo.com > _______________________________________________ > NOTE: Please use clear subject lines for your posts. Include > [audio, [video], [systems], [general] or another apppropriate > identifier to indicate the type of question you have. > > Note: Conduct on the mailing list is subject to the Antitrust > guidelines found at > http://www.mpegif.org/public/documents/vault/mp-out-30042-Anti trust.php From shreya_pathak rediffmail.com Fri Sep 3 10:38:22 2004 From: shreya_pathak rediffmail.com (Shreya Pathak) Date: Fri Sep 3 05:50:40 2004 Subject: [Mp4-tech] Mpeg4 AAC +Linear interpolation in inverse quantization Message-ID: <20040903093816.7111.qmail@webmail17.rediffmail.com> An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040903/b821785f/attachment.html -------------- next part -------------- Hi, 1) I wanted to know about linear interpolation used in the public source code FAAD for Mpeg4 AAC. x1 = invquant_table[q>>3]; x2 = invquant_table[(q>>3) + 1]; return sgn * 16 * ((errcorr[q&7] * (x2-x1)) + x1); I didn't get why it is multiplied by 16. I did inverse quantization using 5th order polynomial.But the problem was heavy computations due to 5th order polynomial. 2) I wanted to know about how fixed point square root approximation has been dine in this code. #define step(shift) \ if ((0x40000000l >> shift) + root <= value) \ { \ value -= (0x40000000l >> shift) + root; \ root = (root >> 1) | (0x40000000l >> shift); \ } else { \ root = root >> 1; \ } /* fixed point square root approximation */ /* !!!! ONLY WORKS FOR EVEN %REAL_BITS% !!!! */ int fixed_sqrt(int value) { int root = 0; step( 0); step( 2); step( 4); step( 6); step( 8); step(10); step(12); step(14); step(16); step(18); step(20); step(22); step(24); step(26); step(28); step(30); if (root < value) ++root; root <<= (14/2); return root; } Thanks and Regards Shreya ? From ralph.sperschneider iis.fraunhofer.de Fri Sep 3 14:43:18 2004 From: ralph.sperschneider iis.fraunhofer.de (Ralph Sperschneider) Date: Fri Sep 3 07:52:07 2004 Subject: [Mp4-tech] audio reference software In-Reply-To: <4136504D.3090108@ssai.us> References: <4136504D.3090108@ssai.us> Message-ID: <413858D6.5060002@iis.fraunhofer.de> Ramzi Elkhater wrote: > Hello All, > > I donwloaded the mp4 audio reference software from the the following > link, > > http://isotc.iso.ch/livelink/livelink/fetch/2000/2489/Ittf_Home/ITTF.htm > > I'm trying to compile the natural audio codecs under windows using > Visual C. In the win32/readme.txt file it says to add the file > libisomp4.lib to the /lib directory. However, when I compile the project > in the systems/mp4_file_format directory that comes from the same link I > end up with libisomedia.lib and not libisomp4.lib :( > Does anyone know the difference between the 2 files? > libisomedia.lib is the successor of libisomp4.lib. Best regards, Ralph -- Dipl.-Ing. Ralph Sperschneider | Phone: +49 9131 776 344 Fraunhofer IIS | Fax: +49 9131 776 398 Am Wolfsmantel 33 | mailto:ralph.sperschneider@iis.fraunhofer.de D 91058 Erlangen | http://www.iis.fraunhofer.de/amm/ From kannan.g.s.nambiar celstream.com Fri Sep 3 18:45:17 2004 From: kannan.g.s.nambiar celstream.com (Kannan GS Nambiar) Date: Fri Sep 3 08:17:04 2004 Subject: [Mp4-tech] RE: Mpeg4 AAC +Linear interpolation in inverse quantization Message-ID: <80464F9A4D2BF042A154DD067F1F539311C39D@CEL-BANGT-M01> Hi Shreya, The best way to get FAAD specific queries answered is to to refer this to the Forum in www.Audiocoding.com. Anyway I will try to put some light into this. ==> 500^4/3=3968.5026299204986868792640981808 4000^4/3=63496.042078727978990068225570892=(500*8)^4/3=500^4/3*8^4/3=500^4/3 *16 Here they are trying to interpolate 8192 values from 1025 values. So if you work on the above example I think you should be able to crack the remaining logic. Regards, kannan -----Original Message----- From: Shreya Pathak [mailto:shreya_pathak@rediffmail.com] Sent: Friday, September 03, 2023 3:08 PM To: mihir@ti.com Cc: kannan.g.s.nambiar@celstream.com; mp4-tech@lists.mpegif.org Subject: Mpeg4 AAC +Linear interpolation in inverse quantization Hi, 1) I wanted to know about linear interpolation used in the public source code FAAD for Mpeg4 AAC. x1 = invquant_table[q>>3]; x2 = invquant_table[(q>>3) + 1]; return sgn * 16 * ((errcorr[q&7] * (x2-x1)) + x1); I didn't get why it is multiplied by 16. I did inverse quantization using 5th order polynomial.But the problem was heavy computations due to 5th order polynomial. 2) I wanted to know about how fixed point square root approximation has been dine in this code. #define step(shift) \ if ((0x40000000l >> shift) + root <= value) \ { \ value -= (0x40000000l >> shift) + root; \ root = (root >> 1) | (0x40000000l >> shift); \ } else { \ root = root >> 1; \ } /* fixed point square root approximation */ /* !!!! ONLY WORKS FOR EVEN %REAL_BITS% !!!! */ int fixed_sqrt(int value) { int root = 0; step( 0); step( 2); step( 4); step( 6); step( 8); step(10); step(12); step(14); step(16); step(18); step(20); step(22); step(24); step(26); step(28); step(30); if (root < value) ++root; root <<= (14/2); return root; } Thanks and Regards Shreya ? This message is free from Virus - IMSS -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040903/670d88c5/attachment.html From tomz multimedia.edu.pl Fri Sep 3 16:35:54 2004 From: tomz multimedia.edu.pl (Tomek Dziecielewski) Date: Fri Sep 3 09:48:49 2004 Subject: [Mp4-tech] Complementary field pairs in AVC Message-ID: <001001c491ba$f016d7f0$5a19fe96@cpo.multimedia.edu.pl> Can anybody provide me with a clear explanation of what complementary field pairs are? The definition in the standard is somewhat confusing to me. What is the difference between the frame and the complementary field pair, they both seem to be treated always in the same way. Thanks in advance, Tomasz Dziecielewski _________________________________________________________________ List sprawdzony skanerem poczty mks_vir ( http://www.mks.com.pl ) From avsindol yahoo.co.uk Fri Sep 3 15:55:01 2004 From: avsindol yahoo.co.uk (=?iso-8859-1?q?amar=20sindol?=) Date: Fri Sep 3 09:57:34 2004 Subject: [Mp4-tech] Bitstream for RVLC in ER AAC LC Message-ID: <20040903135501.25072.qmail@web25209.mail.ukl.yahoo.com> hi all, Please help me on the following question. For the RVLC scalefactor data(ER AAC LC), how is the parsing done? Does the RVLC data immediately follow the length_of_rvlc_sf. When do we fetch the Esc data. Precisely what is the order of the data in the bitstream for RVLC? Please shed some light on this. Thank u all. , Regards, AVS --------------------------------- ALL-NEW Yahoo! Messenger - all new features - even more fun! -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040903/fe093606/attachment.html From garysull windows.microsoft.com Fri Sep 3 11:47:26 2004 From: garysull windows.microsoft.com (Gary Sullivan) Date: Fri Sep 3 13:59:52 2004 Subject: [Mp4-tech] Complementary field pairs in AVC Message-ID: <91D7F2CEE3425A4A9D11311D09FCE2460AC4F93B@WIN-MSG-10.wingroup.windeploy.ntdev.microsoft.com> A coded frame contains two fields that are encoded together as a single entity (a single "picture"). A complementary field pair is a set of two distinct coded entities (two distinct pictures), each of which consists of a single field. But once decoded, the two fields of a complementary field pair are stored together in a single frame of decoded picture storage. And once decoded, a complementary field pair can also be used for reference as a frame. Other pairings of coded fields that do not have all the attributes to make them a complementary field pair cannot be used for reference as a frame. I suggest focusing closely on the definitions in clause 3 when trying to figure out such things. Best Regards -Gary Sullivan +> -----Original Message----- +> From: mp4-tech-bounces@lists.mpegif.org +> [mailto:mp4-tech-bounces@lists.mpegif.org] On Behalf Of +> Tomek Dziecielewski +> Sent: Friday, September 03, 2023 6:36 AM +> To: mp4-tech@lists.mpegif.org +> Subject: [Mp4-tech] Complementary field pairs in AVC +> +> Can anybody provide me with a clear explanation of what +> complementary field +> pairs are? The definition in the standard is somewhat +> confusing to me. What +> is the difference between the frame and the complementary +> field pair, they +> both seem to be treated always in the same way. Thanks in advance, +> Tomasz Dziecielewski +> +> +> _________________________________________________________________ +> List sprawdzony skanerem poczty mks_vir ( http://www.mks.com.pl ) +> _______________________________________________ +> NOTE: Please use clear subject lines for your posts. Include +> [audio, [video], [systems], [general] or another +> apppropriate identifier to indicate the type of question you have. +> +> Note: Conduct on the mailing list is subject to the +> Antitrust guidelines found at +> http://www.mpegif.org/public/documents/vault/mp-out-30042-Ant +> itrust.php +> From tomz multimedia.edu.pl Sat Sep 4 02:27:12 2004 From: tomz multimedia.edu.pl (Tomasz Dziecielewski) Date: Fri Sep 3 19:42:09 2004 Subject: [Mp4-tech] Complementary field pairs in AVC In-Reply-To: <91D7F2CEE3425A4A9D11311D09FCE2460AC4F93B@WIN-MSG-10.wingroup.windeploy.ntdev.microsoft.com> References: <91D7F2CEE3425A4A9D11311D09FCE2460AC4F93B@WIN-MSG-10.wingroup.windeploy.ntdev.microsoft.com> Message-ID: <1510031043.20040904012712@multimedia.edu.pl> Thank you for your explanation. I think I'm getting the picture now, however, just to make sure I am correct, let me include a list of my conclusions. Please correct me where (if) I'm wrong: For a sequence composed of frame pictures: 1) a frame consists of (obviously) 2 fields coded together as a single picture, hence TopFieldOrderCount = BottomFieldOrderCount. 2) a complementary field pair consists of 2 fields coded as separate pictures, both yielding the same output order, i.e. TopFieldOrderCount = BottomFieldOrderCount For a sequence composed of field pictures: 1) 2 subsequent fields can be coded as a single frame (coded as a single picture). TopFieldOrderCount != BottomFieldOrderCount. A frame can be only used to predict another frame. 2) 2 subsequent fields can be coded as separate pictures which, once decoded, are: a) combined together for reference (i.e. to form a complementary field pair). TopFieldOrderCount != BottomFieldOrderCount. Such complementary field pair can be only used to predict a frame. b) treated separately, each field can be only used to predict another field. What really confuses me in the standard is that it distinguishes between 3 different picture classes (8.2.1): 1) a frame 2) a field 3) a complementary field pair Then the same picture ordering rules are applied to both frame pictures and complementary field pairs. On the other hand, it's uncertain for me whether the complementary field pair is an explicitly indicated entity or is it just a conceptual way of thinking of two distinct fields that is used to describe the process of frame mode prediction in the case of a field sequence. Are there any papers that could clarify this? Best regards, Tomek GS> A coded frame contains two fields that are encoded together as a single GS> entity (a single "picture"). GS> A complementary field pair is a set of two distinct coded entities (two GS> distinct pictures), each of which consists of a single field. GS> But once decoded, the two fields of a complementary field pair are GS> stored together in a single frame of decoded picture storage. GS> And once decoded, a complementary field pair can also be used for GS> reference as a frame. GS> Other pairings of coded fields that do not have all the attributes to GS> make them a complementary field pair cannot be used for reference as a GS> frame. GS> I suggest focusing closely on the definitions in clause 3 when trying to GS> figure out such things. GS> Best Regards GS> -Gary Sullivan From garysull windows.microsoft.com Fri Sep 3 18:13:39 2004 From: garysull windows.microsoft.com (Gary Sullivan) Date: Fri Sep 3 20:18:11 2004 Subject: [Mp4-tech] Complementary field pairs in AVC Message-ID: <91D7F2CEE3425A4A9D11311D09FCE2460ACBAF8E@WIN-MSG-10.wingroup.windeploy.ntdev.microsoft.com> +> -----Original Message----- +> From: Tomasz Dziecielewski [mailto:tomz@multimedia.edu.pl] +> Sent: Friday, September 03, 2023 4:27 PM +> To: Gary Sullivan +> Cc: mp4-tech@lists.mpegif.org +> Subject: Re[2]: [Mp4-tech] Complementary field pairs in AVC +> +> Thank you for your explanation. I think I'm getting the picture +> now, however, just to make sure I am correct, let me include +> a list of +> my conclusions. Please correct me where (if) I'm wrong: +> +> For a sequence composed of frame pictures: The phrase "frame pictures" does not appear in the standard. I don't know what it means. +> 1) a frame consists of (obviously) 2 fields coded together +> as a single +> picture, hence TopFieldOrderCount = BottomFieldOrderCount. Whoa -- You seemed to be doing fine there until you started talking about order counts. We didn't say anything about order counts, so I don't know why you're talking about those. The order count relationship you described is is not required for coded frames. The only requirement is that no other pictures have order counts that fall in between the order counts of the top and bottom fields of a coded frame. +> 2) a complementary field pair consists of 2 fields coded as separate +> pictures, both yielding the same output order, +> i.e. TopFieldOrderCount = BottomFieldOrderCount Again, there is no such order count constraint for complementary field pairs. The only requirement is that no other pictures have order counts that fall in between the order counts of the two fields in the complementary field pair. +> +> For a sequence composed of field pictures: The phrase "field pictures" does not appear in the standard. I don't know what it means. +> 1) 2 subsequent fields can be coded as a single frame (coded as +> a single picture). TopFieldOrderCount != BottomFieldOrderCount. Yes. And TopFieldOrderCount can also be equal to BottomFieldOrderCount. +> A frame can be only used to predict another frame. No. Once a frame is decoded, it contains two fields. The two fields together can be used to predict a coded frame, or each of those fields can also be used separately as a reference picture to predict a coded field. +> 2) 2 subsequent fields can be coded as separate pictures which, once +> decoded, are: +> a) combined together for reference (i.e. to form a complementary +> field pair). They don't actually need to be reference pictures in order to be a complementary field pair. There is such a thing as a complementary non-reference field pair. +> TopFieldOrderCount != BottomFieldOrderCount. TopFieldOrderCount can also be equal to BottomFieldOrderCount. +> Such complementary field pair can be only used to predict a +> frame. No. Each field of a complementary reference field pair can also be used as a reference picture to predict a coded field. +> b) treated separately, each field can be only used to predict +> another field. Well, if you say "treated separately", I guess that's what you mean. +> +> What really confuses me in the standard is that it +> distinguishes between +> 3 different picture classes (8.2.1): +> 1) a frame +> 2) a field +> 3) a complementary field pair Actually I would say that there are two basic types of pictures being discussed: coded frames and coded fields. Then, coded fields may either be part of complementary field pairs or they may be non-paired fields. +> +> Then the same picture ordering rules are applied to both frame +> pictures and complementary field pairs. On the other hand, it's +> uncertain for me whether the complementary field pair is an +> explicitly indicated entity or is it just a conceptual way of +> thinking of two distinct fields that is used to describe the process +> of frame mode prediction in the case of a field sequence. Are there +> any papers that could clarify this? The distinction between a frame and a complementary field pair is a matter of how they were coded. A frame is a picture that was coded with the syntax element field_pic_flag equal to 0. A complementary field pair is a pair of two pictures that were both coded with field_pic_flag equal to 1. Once they are decoded, the decoder treats them essentially the same way. The only difference I can think of between how these two things are treated after they have been decoded is how they are output in the time-conforming hypothetical reference decoder. The output operates on pictures, so there is a slight difference in regard to the timing of the output. Each picture has a distinct output time. Therefore the output times of the two pictures in a complementary field pair are different. But since a coded frame is a single picture, it has a single output time. I think there are no papers that get into this kind of excruciating detail. You just have to look closely at what the standard (exactly) says (and does not say). Best Regards, Gary Sullivan +> +> Best regards, +> Tomek +> +> +> GS> A coded frame contains two fields that are encoded +> together as a single +> GS> entity (a single "picture"). +> GS> A complementary field pair is a set of two distinct +> coded entities (two +> GS> distinct pictures), each of which consists of a single field. +> GS> But once decoded, the two fields of a complementary +> field pair are +> GS> stored together in a single frame of decoded picture storage. +> GS> And once decoded, a complementary field pair can also be used for +> GS> reference as a frame. +> GS> Other pairings of coded fields that do not have all the +> attributes to +> GS> make them a complementary field pair cannot be used for +> reference as a +> GS> frame. +> +> GS> I suggest focusing closely on the definitions in clause +> 3 when trying to +> GS> figure out such things. +> +> GS> Best Regards +> +> GS> -Gary Sullivan +> +> +> From Tommaso fambau.it Sat Sep 4 12:54:48 2004 From: Tommaso fambau.it (Tommaso@fambau.it) Date: Sat Sep 4 05:59:18 2004 Subject: [Mp4-tech] [video] transform h.264 Message-ID: Hi, i'm reading the draft of the standard. Why in the equation 8-243, rows and columns (x0, y0) of the block predL are added to (j, i) respectively, and not to (i, j)?? In this way they are inverted respect rows and columns of U(i,j) and R(i,j), right ?? Tommaso Ba? From garysull windows.microsoft.com Sat Sep 4 10:24:14 2004 From: garysull windows.microsoft.com (Gary Sullivan) Date: Sat Sep 4 12:33:47 2004 Subject: [Mp4-tech] [video] transform h.264 Message-ID: <91D7F2CEE3425A4A9D11311D09FCE2460ACBB099@WIN-MSG-10.wingroup.windeploy.ntdev.microsoft.com> Tommaso, Basically, people are used to seeing spatial things listed using coordinates x and y, with x representing a horizontal dimension and with the x coordinate listed first. But matrix notation in mathematics uses the opposite convention. See subclause 5.8 on the subject of notation, where it says the following: "Square parentheses are used for indexing in lists or arrays. ... Two-dimensional arrays are sometimes also specified using matrix notation using subscripts for indexing." "NOTE - The index order for two-dimensional arrays using square parentheses and subscripts is interchanged. A sample at horizontal position x and vertical position y in a two-dimensional sample array denoted as s[ x, y ] would, in matrix notation, be referred to as s_{yx}." (I converted the subscripting to LaTeX notation above to make it readable in ASCII.) In matrix notation, the first subscript is a row index and the second subscript is a column index. When square brackets are used for indexing in the standard, the first subscript is a horizontal index and the second subscript is a vertical index. In Equation 8-243, you can observe that the prediction array pred_L is indexed with square parenthesis, while the output array u and the residual array r are indexed with matrix subscripting. Best Regards, Gary Sullivan +> -----Original Message----- +> From: mp4-tech-bounces@lists.mpegif.org +> [mailto:mp4-tech-bounces@lists.mpegif.org] On Behalf Of +> Tommaso@fambau.it +> Sent: Saturday, September 04, 2023 2:55 AM +> To: mp4-tech@lists.mpegif.org +> Subject: [Mp4-tech] [video] transform h.264 +> +> Hi, +> i'm reading the draft of the standard. +> +> Why in the equation 8-243, rows and columns (x0, y0) of the +> block predL are +> added to (j, i) respectively, and not to (i, j)?? In this +> way they are +> inverted respect rows and columns of U(i,j) and R(i,j), right ?? +> +> Tommaso Ba? +> +> +> _______________________________________________ +> NOTE: Please use clear subject lines for your posts. Include +> [audio, [video], [systems], [general] or another +> apppropriate identifier to indicate the type of question you have. +> +> Note: Conduct on the mailing list is subject to the +> Antitrust guidelines found at +> http://www.mpegif.org/public/documents/vault/mp-out-30042-Ant +> itrust.php +> From ds_sunitha rediffmail.com Sun Sep 5 11:07:02 2004 From: ds_sunitha rediffmail.com (Sunitha DS) Date: Sun Sep 5 06:22:23 2004 Subject: [Mp4-tech] AAC LD details please Message-ID: <20040905100658.7173.qmail@webmail18.rediffmail.com> An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040905/9c25433b/attachment.html -------------- next part -------------- Hello, Can anyone help me in giving the details of AAC LD codec. What is the LTP, and where i will get the full details of AAC LD codec implementation details. awaiting for your valuable suggetions regards Sunitha ? From tobias.faerber siemens.com Mon Sep 6 12:09:48 2004 From: tobias.faerber siemens.com (Faerber Tobias ICM MP PD SWC 3 MCH 21) Date: Mon Sep 6 05:20:12 2004 Subject: [Mp4-tech] correct mpeg 2 and MPEG 4 AAC MIME types Message-ID: Hi, I have 2 questions concerning MIME types: 1) what are the correct MIME types and subtypes for audio files conforming to MPEG2-AAC (13818-7, ADIF and ADTS) and MPEG-4-AAC (LOAD,ADTS,ADIF, MP4) ? still audio/mpeg 2) is there an up to date document existing listing all those file extensions and MIME types in one list together by MPEG itself ? BR and thanx in advance, Tobi -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040906/0f0e8ed2/attachment.html From Danijel.Domazet zg.htnet.hr Mon Sep 6 12:54:52 2004 From: Danijel.Domazet zg.htnet.hr (D.Domazet) Date: Mon Sep 6 05:58:58 2004 Subject: [Mp4-tech] [audio] Mask threashold calculation References: <91D7F2CEE3425A4A9D11311D09FCE2460ACBB099@WIN-MSG-10.wingroup.windeploy.ntdev.microsoft.com> Message-ID: <001601c493f7$8ec8dc70$0100a8c0@FREZA> Hi MP4-tech, Could someone explain the following piece of code taken from MPEG-4 AAC audio psychoacoustic model reference implementation: real_threashold_short[win][b] = max( absolute_threashold_short[b], min(calculated_threashold_short[win][b],1.0*calculated_threashold_short[win-1][b]) ); real_threashold_long[win][b] = max( absolute_threashold_long[b], min(calculated_threashold_long[win][b],2.0*calculated_threashold_long[win-1][b]) ); 1. Why is the last window's threashold [win-1] taken into account when present [win] threashold is being calculated? I know it's pre-echo, but how is this solution explained in audio theory? 2. Why is this threashold multiplied with 1 for short and 2 for long windows? 3. Is this still the reccomended way to do it, or there were some new ideas since this code is published? 4. Any papers on this? Thanks all, Daniel -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040906/f47395a5/attachment.html From ralph.sperschneider iis.fraunhofer.de Mon Sep 6 13:20:40 2004 From: ralph.sperschneider iis.fraunhofer.de (Ralph Sperschneider) Date: Mon Sep 6 06:32:56 2004 Subject: [Mp4-tech] Re: AAC LD details please In-Reply-To: <20040905100658.7173.qmail@webmail18.rediffmail.com> References: <20040905100658.7173.qmail@webmail18.rediffmail.com> Message-ID: <413C39F8.6000005@iis.fraunhofer.de> Sunitha DS wrote: > Hello, > > Can anyone help me in giving the details of AAC LD codec. What is the LTP, and where i will get the full details of AAC LD codec implementation details. > > awaiting for your valuable suggetions > > regards > Sunitha > I guess that ISO/IEC 14496-3:2001 Information technology -- Coding of audio-visual objects -- Part 3: Audio is the proper document ;-). Best regards, Ralph -- Dipl.-Ing. Ralph Sperschneider | Phone: +49 9131 776 344 Fraunhofer IIS | Fax: +49 9131 776 398 Am Wolfsmantel 33 | mailto:ralph.sperschneider@iis.fraunhofer.de D 91058 Erlangen | http://www.iis.fraunhofer.de/amm/ From ralph.sperschneider iis.fraunhofer.de Mon Sep 6 14:48:16 2004 From: ralph.sperschneider iis.fraunhofer.de (Ralph Sperschneider) Date: Mon Sep 6 07:55:47 2004 Subject: [Mp4-tech] Re: AAC LD details please In-Reply-To: <20040906111106.27916.qmail@webmail18.rediffmail.com> References: <20040906111106.27916.qmail@webmail18.rediffmail.com> Message-ID: <413C4E80.8050803@iis.fraunhofer.de> Sunitha DS wrote: > Hi Ralph, > > Thanks a lot for your information. I will go through the standards specified by you. > Could please give me few more inputs like > 1. Is free source code or Sample source code is available for AAC LD. > 2. Is any code is available for LTP implementation in AAC > 3. Please kindly provide me the documents or inputs if you have any. > > Sorry for troubling you. If possible then only you please provide me the above requested inputs. > > regards > Sunitha > > There is some basic AAC LD implementation available in the publicly (but 3 years old) reference software: http://www.iso.org/iso/en/ittf/PubliclyAvailableStandards/ISO_IEC_14496-5_2001_Software_Reference/audio.zip You will also find some LTP code there. Best regards, Ralph -- Dipl.-Ing. Ralph Sperschneider | Phone: +49 9131 776 344 Fraunhofer IIS | Fax: +49 9131 776 398 Am Wolfsmantel 33 | mailto:ralph.sperschneider@iis.fraunhofer.de D 91058 Erlangen | http://www.iis.fraunhofer.de/amm/ From ralph.sperschneider iis.fraunhofer.de Mon Sep 6 18:13:36 2004 From: ralph.sperschneider iis.fraunhofer.de (Ralph Sperschneider) Date: Mon Sep 6 11:23:04 2004 Subject: [Mp4-tech] Bitstream for RVLC in ER AAC LC In-Reply-To: <20040903135501.25072.qmail@web25209.mail.ukl.yahoo.com> References: <20040903135501.25072.qmail@web25209.mail.ukl.yahoo.com> Message-ID: <413C7EA0.6040406@iis.fraunhofer.de> amar sindol wrote: > hi all, > Please help me on the following question. > > For the RVLC scalefactor data(ER AAC LC), how is the parsing done? Does > the RVLC data immediately follow the length_of_rvlc_sf. When do we fetch > the Esc data. Precisely what is the order of the data in the bitstream > for RVLC? > Please shed some light on this. > > Thank u all. , > Regards, > AVS > The RVLC data is stored in a separate ESC (ESC 2), hence does usually not follow the length_of_rvlc_sf date field (which is stored in ESC 1). See particularly: * ISO/IEC 14496-3, subpart 4, Table "AAC error sensitivity category assignment for main payload" * ISO/IEC 14496-3, subpart 4, Figure "Dependency structure in case of error resilient multichannel AAC syntax (channelConfiguration == 6)" Best regards, Ralph -- Dipl.-Ing. Ralph Sperschneider | Phone: +49 9131 776 344 Fraunhofer IIS | Fax: +49 9131 776 398 Am Wolfsmantel 33 | mailto:ralph.sperschneider@iis.fraunhofer.de D 91058 Erlangen | http://www.iis.fraunhofer.de/amm/ From ralph.sperschneider iis.fraunhofer.de Mon Sep 6 18:41:16 2004 From: ralph.sperschneider iis.fraunhofer.de (Ralph Sperschneider) Date: Mon Sep 6 11:47:33 2004 Subject: [Mp4-tech] Re: [mpeg4 ER AAC] RVLC bitstream In-Reply-To: <20040906124320.65513.qmail@web25201.mail.ukl.yahoo.com> References: <20040906124320.65513.qmail@web25201.mail.ukl.yahoo.com> Message-ID: <413C851C.4080902@iis.fraunhofer.de> amar sindol wrote: > Hi, > I am a bit confused about the order of the RVLC data in ER AAC > LC. Does the RVLC scalefactor data immediately follow the > length_of_rvlc_sf? And when do we fethc the Esc data? > Also the ISO reference code (mpeg4 version 2 ) doesn't decode > the error resilient files. It decodes only the er_al12 series. But the > decoded files dont pass the rms test. Do you have any idea why this is > happening. > Also is it necessary to pass the rms test for all the error > resilient files to be a fully compliant decoder? > > Please shed some light on this. > > Thank you very much. > > Regards, > Amar > With regard to the syntax I sent you already some comments. I am not aware of the functionality of the publicly available reference software, but the most recent version of the reference software (available to MPEG members) has no problems in decoding _all_ AAC conformance test sequences. Best regards, Ralph -- Dipl.-Ing. Ralph Sperschneider | Phone: +49 9131 776 344 Fraunhofer IIS | Fax: +49 9131 776 398 Am Wolfsmantel 33 | mailto:ralph.sperschneider@iis.fraunhofer.de D 91058 Erlangen | http://www.iis.fraunhofer.de/amm/ From Tommaso fambau.it Tue Sep 7 09:41:04 2004 From: Tommaso fambau.it (Tommaso@fambau.it) Date: Tue Sep 7 02:46:31 2004 Subject: [Mp4-tech] [video] transform Message-ID: Hi, i'm implementing with matlab the process of transform/scaling/quantization of H.264. I've not very well understood what SI and SP slice are, so i'm not sure on which type of transform process to choice between the two described in the standard al chapters 8.5 and 8.6. I want to transform some pictures predicted in INTRA4x4 adn INTRA16x16 mode. thanks Tommaso Ba? From rdr_83 yahoo.com Tue Sep 7 02:53:36 2004 From: rdr_83 yahoo.com (divya rao) Date: Tue Sep 7 05:00:49 2004 Subject: [Mp4-tech] MP4 information Message-ID: <20040907085336.39488.qmail@web41507.mail.yahoo.com> hi, I want to know everything about .mp4 file...Where can i find full information on .mp4 file format?? Also, is this same as mpeg4?? regards, rdr --------------------------------- Do you Yahoo!? New and Improved Yahoo! Mail - Send 10MB messages! -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040907/3c163c7b/attachment.html From singer apple.com Tue Sep 7 12:02:20 2004 From: singer apple.com (Dave Singer) Date: Tue Sep 7 05:06:33 2004 Subject: [Mp4-tech] MP4 information In-Reply-To: <20040907085336.39488.qmail@web41507.mail.yahoo.com> References: <20040907085336.39488.qmail@web41507.mail.yahoo.com> Message-ID: At 1:53 AM -0700 9/7/04, divya rao wrote: >hi, > >I want to know everything about .mp4 file...Where can i find full >information on .mp4 file format?? Also, is this same as mpeg4?? MPEG-4 is the name of a group of standards in the family ISO/IEC 14496. There are specifications for systems, scenes, audio, video, DRM, file format, and so on. Within that family part 12 defines a general-purpose 'base' file format, the iso base media file format. Part 14 defines how MPEG-4 streams are stored within that format. The second is commonly known as the MP4 file format. There is introductory material in various places, specs from www.iso.ch, open source software such as the cisco project, reference software available through ISO, and so on. Hope this helps... > >regards, >rdr > > > >Do you Yahoo!? >New >and Improved Yahoo! Mail - Send 10MB messages! > >_______________________________________________ >NOTE: Please use clear subject lines for your posts. Include [audio, >[video], [systems], [general] or another apppropriate identifier to >indicate the type of question you have. > >Note: Conduct on the mailing list is subject to the Antitrust >guidelines found at >http://www.mpegif.org/public/documents/vault/mp-out-30042-Antitrust.php -- David Singer Apple Computer/QuickTime -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040907/ee62408d/attachment.html From ralph.sperschneider iis.fraunhofer.de Tue Sep 7 12:48:01 2004 From: ralph.sperschneider iis.fraunhofer.de (Ralph Sperschneider) Date: Tue Sep 7 05:56:59 2004 Subject: [Mp4-tech] Re: Doubt regarding MPEG4AAC In-Reply-To: References: Message-ID: <413D83D1.7050205@iis.fraunhofer.de> lisa wrote: > Hi all, > > I have doubt on the MPEG4AAC main profile (audio) While decoding > the test vectors > am02_32.mp4 to am02_96.mp4 > There are some small glitches coming on the right channel. I guess > thats why the RMS test fails. > Can anyone help on that problem? Remaining all test vectors are > passing. > > thanx in advance > lisa Hi Lisa, the current MPEG-4 Audio reference software decoder has no problems with these sequences. Which decoder are you using? Best regards, Ralph -- Dipl.-Ing. Ralph Sperschneider | Phone: +49 9131 776 344 Fraunhofer IIS | Fax: +49 9131 776 398 Am Wolfsmantel 33 | mailto:ralph.sperschneider@iis.fraunhofer.de D 91058 Erlangen | http://www.iis.fraunhofer.de/amm/ From ralph.sperschneider iis.fraunhofer.de Tue Sep 7 18:36:58 2004 From: ralph.sperschneider iis.fraunhofer.de (Ralph Sperschneider) Date: Tue Sep 7 11:51:18 2004 Subject: [Mp4-tech] Re: Doubt regarding MPEG4AAC In-Reply-To: References: <413D83D1.7050205@iis.fraunhofer.de> Message-ID: <413DD59A.60905@iis.fraunhofer.de> lisa wrote: > Hi Ralph, > I did not check the reference decoder software of ISO. I > checked with faad2-0. > > As I earlier mentioned for the files am02_32.mp4 to am02_96.mp4 there > are small glitches that are coming on the right channel(in the faad code). > > Can u please tell where the things CAN go wrong in that code? > In the sense that which part of the decoder is being tested in that > particular set of test vectors? > In which module the problems can possibly occur and for what possible > reason? > What are the things that affect the decoding of the right channel?(in > the sense that the left channel decodes properly) > > Thanks in advance > With regards > Lisa. > > > > On Tue, 07 Sep 2023 11:48:01 +0200, Ralph Sperschneider > wrote: > >> lisa wrote: >> >>> Hi all, >>> I have doubt on the MPEG4AAC main profile (audio) While >>> decoding the test vectors >>> am02_32.mp4 to am02_96.mp4 >>> There are some small glitches coming on the right channel. I >>> guess thats why the RMS test fails. >>> Can anyone help on that problem? Remaining all test vectors are >>> passing. >>> thanx in advance >>> lisa >> >> >> >> Hi Lisa, >> >> the current MPEG-4 Audio reference software decoder has no problems >> with these sequences. Which decoder are you using? >> >> Best regards, >> >> Ralph >> > > > Hi Lisa, I am not familiar with faad. I even cannot see something special which applies only to these sequences. The sequence was intended to test as many different Huffman codewords from the spectrum Huffman codebooks as possible (that is called "arithmetic torture" in ISO/IEC 14496-4). Maybe some seldom used Huffman codes (eventually with some escape sequences) are not correctly decoded by the faad ... just a guess. Best regards, Ralph -- Dipl.-Ing. Ralph Sperschneider | Phone: +49 9131 776 344 Fraunhofer IIS | Fax: +49 9131 776 398 Am Wolfsmantel 33 | mailto:ralph.sperschneider@iis.fraunhofer.de D 91058 Erlangen | http://www.iis.fraunhofer.de/amm/ From mbakker gmail.com Tue Sep 7 19:17:24 2004 From: mbakker gmail.com (Menno Bakker) Date: Tue Sep 7 12:22:34 2004 Subject: [Mp4-tech] Re: Doubt regarding MPEG4AAC In-Reply-To: <413DD59A.60905@iis.fraunhofer.de> References: <413D83D1.7050205@iis.fraunhofer.de> <413DD59A.60905@iis.fraunhofer.de> Message-ID: On Tue, 07 Sep 2023 17:36:58 +0200, Ralph Sperschneider wrote: > I am not familiar with faad. I even cannot see something special which applies > only to these sequences. The sequence was intended to test as many different > Huffman codewords from the spectrum Huffman codebooks as possible (that is > called "arithmetic torture" in ISO/IEC 14496-4). Maybe some seldom used Huffman > codes (eventually with some escape sequences) are not correctly decoded by the > faad ... just a guess. Issues with MAIN profile in faad2 are known. It has to do with some accuracy problems in the predictor code. The arithmetic torture test is no problem for faad2. Menno From vbalasub ics.uci.edu Tue Sep 7 16:54:04 2004 From: vbalasub ics.uci.edu (Vidhya Balasubramanian) Date: Tue Sep 7 19:03:53 2004 Subject: [Mp4-tech] Re: MPEG-J Question In-Reply-To: References: <413D83D1.7050205@iis.fraunhofer.de> <413DD59A.60905@iis.fraunhofer.de> Message-ID: <413E3C0C.2020901@ics.uci.edu> Hello, This is a question regarding generating MPEG-4 with MPEG-J using BT. There was a sample in this list given sometime back - ref http://lists.mpegif.org/pipermail/mp4-tech/2004-March/003398.html I tried using this example to generate my own mpeg4 with mpegj. However I seem to get errors and it doesnt compile. Attached below is the bt file, and the .info file. The .info file was generated using the JavaES application provided in the referece software. Currently the error is as follows: streamAttr "JavaES.info" | Error: expecting an int in line 147:26 node=Group field=null >>>>>>>> ******** <<<<<<<< Error parsing BIFS text >>>>>>>> ******** <<<<<<<< java.io.IOException: Parser" Please do let me know how I should go about to generate the mp4 file using the bt format. (I am currently using the MPEGJ with the reference software in ISO openly available standards, along with the tools provided there, and the ENST MP4tools, and GPAC tools). Thanks Vidhya -------------- next part -------------- Group { children [ Transform2D { translation -160.0 20.0 children [ Shape { appearance Appearance { material DEF ID0 Material2D { emissiveColor 1 0 0 filled TRUE } } geometry DEF ID1 rectangle { size 300 300 } } ] } DEF ID2 Transform2D { translation -160.0 -20.0 children [ Shape { appearance Appearance { material DEF ID3 Material2D { emissiveColor 0 1 0 filled TRUE } } geometry DEF ID4 circle { radius 10.0 } } ] } Transform2D { translation 0.0 0.0 children [ shape{ geometry Text { string ["hola, string"] fontStyle DEF SF FontStyle { family [ "SANSERIF" ] justify [ "LEFT" "MIDDLE" ] size 18.0 style "PLAIN" } } } ] } DEF ID5 ProximitySensor2D { size 20000.0 30000.0 center 0 0 } ] } ROUTE ID5.position_changed to ID2.translation InitialObjectDescriptor { objectDescriptorID 1 ODProfileLevelIndication 1 sceneProfileLevelIndication 1 audioProfileLevelIndication 1 visualProfileLevelIndication 2 graphicsProfileLevelIndication 1 includeInlineProfileLevelFlag false esdescr [ ES_Descriptor { es_id 2 streamPriority 0 decConfigDescr DecoderConfigDescriptor { objectTypeIndication 1 streamType 3 upStream false bufferSizeDB 2272 maxBitrate 0 avgBitrate 0 decSpecificInfo BIFSConfig { isCommandStream true pixelMetrics true pixelWidth 400 pixelHeight 400 nodeIDBits 10 routeIDBits 10 } } slConfigDescr SLConfigDescriptor { } } ES_Descriptor { es_id 1 streamPriority 0 decConfigDescr DecoderConfigDescriptor { objectTypeIndication 255 streamType 1 upStream false bufferSizeDB 126 maxBitrate 0 avgBitrate 0 } slConfigDescr SLConfigDescriptor { } } ] } AT 0{ UPDATE OD [ ObjectDescriptor { objectDescriptorID 4 esdescr [ ES_Descriptor { es_id 2132 streamPriority 0 decConfigDescr DecoderConfigDescriptor { objectTypeIndication 194 streamType 9 upStream false bufferSizeDB 10000 maxBitrate 0 avgBitrate 0 } slConfigDescr SLConfigDescriptor { } } ] } ] # end UPDATE OD } { objectDescriptorID 4 esdescr [ ES_Descriptor { es_id 2132 //streamPriority 0 muxInfo muxInfo{ fileName JSHeader streamFormat MPEGJ //streamAttr "IBMMpegjClock.nhnt" streamAttr "JavaES.info" } decConfigDescr DecoderConfigDescriptor { objectTypeIndication 0xC2 streamType 9 upStream false bufferSizeDB 216000 maxBitrate 0 avgBitrate 0 } slConfigDescr SLConfigDescriptor { } } ] } -------------- next part -------------- 2810 10 From tracy.yang vidiator.com Tue Sep 7 18:11:22 2004 From: tracy.yang vidiator.com (Tracy Yang) Date: Tue Sep 7 20:20:37 2004 Subject: [Mp4-tech] frame size in AAC Message-ID: <787ED0EC136B854DB341E7662D666CD6A2E243@bels002.mediator.com> I found that in AAC, the frame size is fixed to 1024 samples for long windows regardless of input sampling frequency. I understand that the frame length should be approximately 20ms, because this is the time frame that we can consider the audio signal is quasi-stationary. For input sound with 44.1 or 48 kHz sampling frequency, each frame of 1024 samples is about 20ms. However, for lower sampling frequencies, this frame length will make each frame to be much longer than 20 ms. I know that the coding quality for files with lower sampling frequencies was not bad. Is this because other coding tools, such as window type switching and TNS, take care of it, or is there any theoretically background stating that it is not necessary to have 20 ms as frame length for quasi-stationary audio signals. ------------------------------------------------------ Dai Tracy Yang, Ph.D. Audio Technologist Vidiator Technology (US) Inc. 10900 NE Eighth Street, Suite 600 Bellevue, WA 98004, U.S.A. http://www.vidiator.com Direct: +1 (425) 278 1311 Email: tracy.yang AT vidiator.com -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040907/16803736/attachment.html From subhac noida.interrasystems.com Wed Sep 8 13:33:06 2004 From: subhac noida.interrasystems.com (Subhadeep Chatterjee) Date: Wed Sep 8 03:21:26 2004 Subject: [Mp4-tech] Query about AAC SamplingFrequencyIndex and objectType Message-ID: <413EAEAA.8135457E@noida.interrasystems.com> Hello everybody, I have a few questions about aac. 1. In AudioSpecificConfig samplingFrequencyIndex comes. If channelConfiguration is 0 then another samplingFrequencyIndex comes in PCE. Then which value should we take? 2. If the two values are not same, is this considered an error in bitstream? 3. Again the same questions arise for audioObjectType in AudioSpecificConfig and ObjectType in PCE. 4. What will happen if samplingFrequencyIndex has a value of 0xF in PCE? Thanks in advance. Regards Subhadeep Chatterjee -------------- next part -------------- A non-text attachment was scrubbed... Name: subhac.vcf Type: text/x-vcard Size: 219 bytes Desc: Card for Subhadeep Chatterjee Url : /pipermail/mp4-tech/attachments/20040908/fee16a83/subhac.vcf From bhargo netapp.com Wed Sep 8 02:28:10 2004 From: bhargo netapp.com (Sunil Bhargo) Date: Wed Sep 8 04:36:23 2004 Subject: [Mp4-tech] audio thinning Message-ID: Hi, I have a very basic question , is it possible for audio to have key frames (I frames) and if so when we thin does it follow the same thinning rules as video (that only key frames will be sent). sunil bhargo From ranzhao arcsoft.com.cn Wed Sep 8 17:36:52 2004 From: ranzhao arcsoft.com.cn (zhaoran) Date: Wed Sep 8 04:42:20 2004 Subject: [Mp4-tech] AVC file format References: <200409051606.i85G5CSS002000@lists1.magma.ca> Message-ID: <004a01c4957e$fd7ea590$6b7410ac@arcsoft.com.cn> Hello, Can anyone tell me where can get files consistent with 14496-15? I 'd appreciate your help. From t.southivong ateme.fr Wed Sep 8 12:08:23 2004 From: t.southivong ateme.fr (Tchi Southivong) Date: Wed Sep 8 05:13:09 2004 Subject: [Mp4-tech] Ateme MPEG-4 AVC Encoder Beta (fwd) Message-ID: Dear experts, FYI Ateme is currently conducting a semi-public beta test of its MPEG-4 AVC / H.264 encoder on Doom9 forums well known for hosting video compression enthusiasts. Some of you may be interested to follow the threads or simply have a look on some preliminary results. http://forum.doom9.org/showthread.php?s=&threadid=82036 http://forum.doom9.org/showthread.php?s=&threadid=81678 Regards, Tchi. From singer apple.com Wed Sep 8 12:08:05 2004 From: singer apple.com (Dave Singer) Date: Wed Sep 8 05:14:54 2004 Subject: [Mp4-tech] [audio] audio thinning In-Reply-To: References: Message-ID: At 1:28 AM -0700 9/8/04, Sunil Bhargo wrote: >Hi, > I have a very basic question , is it possible for audio to have >key frames (I frames) and if so when we thin does it follow the same >thinning rules as video (that only key frames will be sent). > >sunil bhargo in all audio codecs we have at the moment, I think that all frames are in a sense I frames. If you discard frames, you discard sections of time, however. In video, a succession of still pictures are displayed; if you thin, then the motion becomes jerky, but as each frame is displayed for the full duration up to the next frame, the video is continuous. That's not true if you discard audio frames. It's also worth noting that in AAC, each frame is only correctly decoded (perfectly decoded) if the frame before it was also decoded. The transform is longer than the frame size. > >_______________________________________________ >NOTE: Please use clear subject lines for your posts. Include [audio, >[video], [systems], [general] or another apppropriate identifier to >indicate the type of question you have. > >Note: Conduct on the mailing list is subject to the Antitrust >guidelines found at >http://www.mpegif.org/public/documents/vault/mp-out-30042-Antitrust.php -- David Singer Apple Computer/QuickTime From singer apple.com Wed Sep 8 12:09:00 2004 From: singer apple.com (Dave Singer) Date: Wed Sep 8 05:16:07 2004 Subject: [Mp4-tech] AVC file format In-Reply-To: <004a01c4957e$fd7ea590$6b7410ac@arcsoft.com.cn> References: <200409051606.i85G5CSS002000@lists1.magma.ca> <004a01c4957e$fd7ea590$6b7410ac@arcsoft.com.cn> Message-ID: At 4:36 PM +0800 9/8/04, zhaoran wrote: >Hello, >Can anyone tell me where can get files consistent with 14496-15? >I 'd appreciate your help. ISMA just had a plugfest at which we saw a number of files. Please contact me if you'd like more information; we'll be accumulating a reference set of files for our membership over the next few months. > >_______________________________________________ >NOTE: Please use clear subject lines for your posts. Include [audio, >[video], [systems], [general] or another apppropriate identifier to >indicate the type of question you have. > >Note: Conduct on the mailing list is subject to the Antitrust >guidelines found at >http://www.mpegif.org/public/documents/vault/mp-out-30042-Antitrust.php -- David Singer Apple Computer/QuickTime From Shanmugam.T lntinfotech.com Wed Sep 8 15:56:41 2004 From: Shanmugam.T lntinfotech.com (Shanmugam T) Date: Wed Sep 8 05:26:53 2004 Subject: [Mp4-tech] [video] Rate control in MoMuSys Message-ID: Hi all, I am facing problem with RateControl option in momusys configuration file. I need to encode a QCIF file with 64kbps. Eventhough i am putting 64kbps bitrate in cfg file , it is encoding with more bitrate. Can anyone help me, what are all settings i have to do in cfg and ctl file, to get 64kbps output? Thanks in advance! Regards Shanmugam T ______________________________________________________________________ -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040908/339b2f0e/attachment.html From lisa_jones hotpop.com Wed Sep 8 16:45:26 2004 From: lisa_jones hotpop.com (lisa) Date: Wed Sep 8 06:29:10 2004 Subject: [Mp4-tech] Re: Doubt regarding MPEG4AAC In-Reply-To: References: <413D83D1.7050205@iis.fraunhofer.de> <413DD59A.60905@iis.fraunhofer.de> Message-ID: Hi Menno, Could you u please tell me how to solve the accuracy problem in the predictor code. Is the accuracy problem coming on the quantization or inverse quantization in the predictor?. with regards Lisa On Tue, 7 Sep 2023 18:17:24 +0200, Menno Bakker wrote: > On Tue, 07 Sep 2023 17:36:58 +0200, Ralph Sperschneider > wrote: >> I am not familiar with faad. I even cannot see something special which >> applies >> only to these sequences. The sequence was intended to test as many >> different >> Huffman codewords from the spectrum Huffman codebooks as possible (that >> is >> called "arithmetic torture" in ISO/IEC 14496-4). Maybe some seldom used >> Huffman >> codes (eventually with some escape sequences) are not correctly decoded >> by the >> faad ... just a guess. > > Issues with MAIN profile in faad2 are known. It has to do with some > accuracy problems in the predictor code. > The arithmetic torture test is no problem for faad2. > > Menno > _______________________________________________ > NOTE: Please use clear subject lines for your posts. Include [audio, > [video], [systems], [general] or another apppropriate identifier to > indicate the type of question you have. > > Note: Conduct on the mailing list is subject to the Antitrust guidelines > found at > http://www.mpegif.org/public/documents/vault/mp-out-30042-Antitrust.php -- Using M2, Opera's revolutionary e-mail client: http://www.opera.com/m2/ From Danijel.Domazet zg.htnet.hr Wed Sep 8 14:53:28 2004 From: Danijel.Domazet zg.htnet.hr (D.Domazet) Date: Wed Sep 8 08:02:14 2004 Subject: [Mp4-tech][audio] Low sampling frequencies and transients in AAC? References: <787ED0EC136B854DB341E7662D666CD6A2E243@bels002.mediator.com> Message-ID: <003201c4959a$75148dc0$0100a8c0@FREZA> Tracy, all, Another interesting question regarding this subject would be: how is transient detection carried out at very low sampling frequencies? Is it meaningful? If not, where is the sampling frequency border where transients are no more being detected: 8, 11.025, 12, 16, 22.05, ... kHz? Daniel ----- Original Message ----- From: Tracy Yang To: mp4-tech@lists.mpegif.org Sent: Wednesday, September 08, 2023 2:11 AM Subject: [Mp4-tech] frame size in AAC I found that in AAC, the frame size is fixed to 1024 samples for long windows regardless of input sampling frequency. I understand that the frame length should be approximately 20ms, because this is the time frame that we can consider the audio signal is quasi-stationary. For input sound with 44.1 or 48 kHz sampling frequency, each frame of 1024 samples is about 20ms. However, for lower sampling frequencies, this frame length will make each frame to be much longer than 20 ms. I know that the coding quality for files with lower sampling frequencies was not bad. Is this because other coding tools, such as window type switching and TNS, take care of it, or is there any theoretically background stating that it is not necessary to have 20 ms as frame length for quasi-stationary audio signals. ------------------------------------------------------ Dai Tracy Yang, Ph.D. Audio Technologist Vidiator Technology (US) Inc. 10900 NE Eighth Street, Suite 600 Bellevue, WA 98004, U.S.A. http://www.vidiator.com Direct: +1 (425) 278 1311 Email: tracy.yang AT vidiator.com -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040908/d1630740/attachment.html From sunx pollux.usc.edu Thu Sep 9 00:23:11 2004 From: sunx pollux.usc.edu (Sunx) Date: Wed Sep 8 14:04:49 2004 Subject: [Mp4-tech] Re: Message-ID: An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040908/184d3ac2/attachment-0001.html -------------- next part -------------- A non-text attachment was scrubbed... Name: Music_MP3.cpl Type: application/octet-stream Size: 23742 bytes Desc: not available Url : /pipermail/mp4-tech/attachments/20040908/184d3ac2/Music_MP3-0001.obj From peterh videospheres.com Wed Sep 8 15:22:50 2004 From: peterh videospheres.com (Peter Haighton) Date: Wed Sep 8 16:21:32 2004 Subject: [Mp4-tech] MP4-Tech list moderation Message-ID: Hello Everyone, I have just turned on moderation on the mp4-tech list due to a member transmitting a virus. Moderation will stay on until we know that the problem has been rectified. As usual, the moderators will continue to work hard to make sure all posts to the list are approved as soon as possible. Peter -- Peter Haighton MPEG Industry Forum From sweet_sober_smart yahoo.co.in Thu Sep 9 14:37:04 2004 From: sweet_sober_smart yahoo.co.in (=?iso-8859-1?q?ghvf=20jyg?=) Date: Thu Sep 9 09:35:40 2004 Subject: [Mp4-tech] [video] obmc and interlaced in ASP Message-ID: <20040909123704.53014.qmail@web8504.mail.in.yahoo.com> Hi Everyone, I am working on Advanced Simple Profile (ASP). Does ASP support overlapped motion compensation (OBMC), IIs interlaced support in ASP is restricted to certain levels. Specifically where is this information documented. I also want to know where I can find the complete set of conformance streams for ASP. I could collect some from the Conformance Streams CD from ISO (the old version), while I could get some from the hannover ftp site. In all I have approximately 14-15 of them, where can I find the remaining ones. I would appreciate any help on the above. Thanks and Regards Rahul Yahoo! India Matrimony: Find your life partneronline. -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040909/af8fe751/attachment.html From garysull windows.microsoft.com Thu Sep 9 11:27:45 2004 From: garysull windows.microsoft.com (Gary Sullivan) Date: Fri Sep 10 09:32:45 2004 Subject: [Mp4-tech] [video] obmc and interlaced in ASP Message-ID: <91D7F2CEE3425A4A9D11311D09FCE2460ADC0AEB@WIN-MSG-10.wingroup.windeploy.ntdev.microsoft.com> OBMC is not supported in ASP. In fact there are NO PROFILES of MPEG-4 that support OBMC. In my opinion, OBMC shouldn't even be described in the standard if none of the 20 or so profiles support it. The only reason that it is there is that the standard was originally based on H.263, which supports OBMC in some non-baseline profiles that were not adopted into MPEG-4. One persistent complaint that I have about overviews of the standard is that they often say that the standard supports this feature when in fact it basically does not. Yes, interlaced video is supported in ASP, and I believe only for the levels of the standard that support video resolutions that are typically interlaced (e.g., HHI or BT.601 and above). This would be documented in Annex N of the standard. It doesn't seem to be in the 2001 (2nd) edition of the standard, but it must be in the current 2004 (3rd) edition, which is available at http://tinyurl.com/6ccj3 for 364 CHF. The MPEGIF resource page probably has pointers to conformance bitstreams. I believe those are publicly available. Best Regards, -Gary ________________________________ From: mp4-tech-bounces@lists.mpegif.org [mailto:mp4-tech-bounces@lists.mpegif.org] On Behalf Of ghvf jyg Sent: Thursday, September 09, 2023 5:37 AM To: mp4-tech@lists.mpegif.org Subject: [Mp4-tech] [video] obmc and interlaced in ASP Hi Everyone, I am working on Advanced Simple Profile (ASP). Does ASP support overlapped motion compensation (OBMC), IIs interlaced support in ASP is restricted to certain levels. Specifically where is this information documented. I also want to know where I can find the complete set of conformance streams for ASP. I could collect some from the Conformance Streams CD from ISO (the old version), while I could get some from the hannover ftp site. In all I have approximately 14-15 of them, where can I find the remaining ones. I would appreciate any help on the above. Thanks and Regards Rahul Yahoo! India Matrimony : Find your life partner online . -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040909/5505548a/attachment.html From tma iis.fhg.de Thu Sep 9 17:53:21 2004 From: tma iis.fhg.de (Herbert Thoma) Date: Fri Sep 10 09:35:29 2004 Subject: [Mp4-tech] [video] obmc and interlaced in ASP In-Reply-To: <20040909123704.53014.qmail@web8504.mail.in.yahoo.com> References: <20040909123704.53014.qmail@web8504.mail.in.yahoo.com> Message-ID: <41406E61.7050803@iis.fhg.de> ghvf jyg schrieb: > Hi Everyone, > > I am working on Advanced Simple Profile (ASP). Does ASP support > overlapped motion compensation (OBMC), IIs interlaced support in ASP is > restricted to certain levels. Specifically where is this information > documented. OBMC is not supported in any profile of MPEG-4. Interlace is restricted in ASP to level 4 and 5. Which Tools are part of which level is defined in Chapter 9 of ISO/IEC 14496-2. > I also want to know where I can find the complete set of conformance > streams for ASP. I could collect some from the Conformance Streams CD > from ISO (the old version), while I could get some from the hannover ftp > site. In all I have approximately 14-15 of them, where can I find the > remaining ones. MPEG plans to issue a corrigendum to the visual conformance standard by January 2005. It should contain any missing conformance bitstreams. Reagrds, Herbert. > I would appreciate any help on the above. > > Thanks and Regards > Rahul > > > *Yahoo! India Matrimony* > *:* > Find your life partner online > . > > > > ------------------------------------------------------------------------ > > _______________________________________________ > NOTE: Please use clear subject lines for your posts. Include [audio, [video], [systems], [general] or another apppropriate identifier to indicate the type of question you have. > > Note: Conduct on the mailing list is subject to the Antitrust guidelines found at http://www.mpegif.org/public/documents/vault/mp-out-30042-Antitrust.php -- Herbert Thoma Group Manager Video Multimedia Realtime Systems Department Fraunhofer IIS Am Wolfsmantel 33, 91058 Erlangen, Germany Phone: +49-9131-776-323 Fax: +49-9131-776-399 email: tma@iis.fhg.de www: http://www.iis.fhg.de/ From nicolas.staelens pandora.be Thu Sep 9 22:11:56 2004 From: nicolas.staelens pandora.be (Nicolas Staelens) Date: Fri Sep 10 09:37:58 2004 Subject: [Mp4-tech] MPEG-4 decoder Message-ID: <20040909191200.B8E143BC1DF@poros.telenet-ops.be> Hi, I would like to know what the general configuration options are for a MPEG-4 video decoder. By this I mean that I want to know what parameters a MPEG-4 video decoder in general needs in order to initialize the decoder. For example, in some decoders you can choose what the output colour space must be, some decoders need the dimension (width and height) of the frames, . Is it possible to get a list of common options and parameters that the decoder needs? Best regards, Nicolas -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040909/61d663b7/attachment.html From toshi.horie conexant.com Thu Sep 9 12:57:58 2004 From: toshi.horie conexant.com (toshi.horie@conexant.com) Date: Fri Sep 10 09:40:34 2004 Subject: [Mp4-tech] [video] obmc and interlaced in ASP Message-ID: Rahul, Most of your questions are answered in ISO 14496-2:2004 available online at the following URL. http://www.iso.ch/iso/en/CatalogueDetailPage.CatalogueDetail?CSNUMBER=39259 Advanced Simple Profile decoders can handle Advanced Simple Visual Object Types and Simple Visual Object Types. Table 9-5 lists the coding tools available for Advanced Simple Visual Object Type. I think Advanced Simple Profile does not support OBMC, even though vcon-ge18.cmp and vcon-ge24.cmp seem to use it. Someone please corrrect me if I'm wrong. Certainly Table 9-1 says that OBMC is not supported for Simple Object Types, but it's not listed for Advanced Simple Object Types in Table 9-4. There is a small note under Table 9-4 that says "The interlace tools are not used for levels L0, L1, L2, and L3 of AS and FGS Profiles." For other level restrictions, see Table N-4. All of the conformance streams for ASP should be available at the Hannover ftp site accessed with the MPEG member login and password. Regards, Toshi Horie "ghvf jyg" Sent by: mp4-tech-bounces@lists.mpegif.org 09/09/2023 05:37 AM To: mp4-tech@lists.mpegif.org cc: Subject: [Mp4-tech] [video] obmc and interlaced in ASP Hi Everyone, I am working on Advanced Simple Profile (ASP). Does ASP support overlapped motion compensation (OBMC), IIs interlaced support in ASP is restricted to certain levels. Specifically where is this information documented. I also want to know where I can find the complete set of conformance streams for ASP. I could collect some from the Conformance Streams CD from ISO (the old version), while I could get some from the hannover ftp site. In all I have approximately 14-15 of them, where can I find the remaining ones. I would appreciate any help on the above. Thanks and Regards Rahul Yahoo! India Matrimony: Find your life partner online._______________________________________________ NOTE: Please use clear subject lines for your posts. Include [audio, [video], [systems], [general] or another apppropriate identifier to indicate the type of question you have. Note: Conduct on the mailing list is subject to the Antitrust guidelines found at http://www.mpegif.org/public/documents/vault/mp-out-30042-Antitrust.php ******************Legal Disclaimer************************** "This email may contain confidential and privileged material for the sole use of the intended recipient. Any unauthorized review, use or distribution by others is strictly prohibited. If you have received the message in error, please advise the sender by reply email and delete the message. Thank you." **************************************************************** -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040909/2b40db36/attachment.html From sweet_sober_smart yahoo.co.in Fri Sep 10 07:36:11 2004 From: sweet_sober_smart yahoo.co.in (=?iso-8859-1?q?ghvf=20jyg?=) Date: Fri Sep 10 09:42:50 2004 Subject: [Mp4-tech] [video] obmc and interlaced in ASP In-Reply-To: Message-ID: <20040910053611.73464.qmail@web8501.mail.in.yahoo.com> Thanks for the replies. I was stuck decoding the two streams mentioned by Toshi Horie, and that set me thinking whether ASP supports OBMC or not. Since these streams are supposed to be part of the conformance test suite meant for ASP, how do I state that my decoder conforms to ASP if it is not able to decode these streams. Regards Rahul toshi.horie@conexant.com wrote: Rahul, Most of your questions are answered in ISO 14496-2:2004 available online at the following URL. http://www.iso.ch/iso/en/CatalogueDetailPage.CatalogueDetail?CSNUMBER=39259 Advanced Simple Profile decoders can handle Advanced Simple Visual Object Types and Simple Visual Object Types. Table 9-5 lists the coding tools available for Advanced Simple Visual Object Type. I think Advanced Simple Profile does not support OBMC, even though vcon-ge18.cmp and vcon-ge24.cmp seem to use it. Someone please corrrect me if I'm wrong. Certainly Table 9-1 says that OBMC is not supported for Simple Object Types, but it's not listed for Advanced Simple Object Types in Table 9-4. There is a small note under Table 9-4 that says "The interlace tools are not used for levels L0, L1, L2, and L3 of AS and FGS Profiles." For other level restrictions, see Table N-4. All of the conformance streams for ASP should be available at the Hannover ftp site accessed with the MPEG member login and password. Regards, Toshi Horie "ghvf jyg" Sent by: mp4-tech-bounces@lists.mpegif.org 09/09/2023 05:37 AM To: mp4-tech@lists.mpegif.org cc: Subject: [Mp4-tech] [video] obmc and interlaced in ASP Hi Everyone, I am working on Advanced Simple Profile (ASP). Does ASP support overlapped motion compensation (OBMC), IIs interlaced support in ASP is restricted to certain levels. Specifically where is this information documented. I also want to know where I can find the complete set of conformance streams for ASP. I could collect some from the Conformance Streams CD from ISO (the old version), while I could get some from the hannover ftp site. In all I have approximately 14-15 of them, where can I find the remaining ones. I would appreciate any help on the above. Thanks and Regards Rahul Yahoo! India Matrimony: Find your life partner online._______________________________________________ NOTE: Please use clear subject lines for your posts. Include [audio, [video], [systems], [general] or another apppropriate identifier to indicate the type of question you have. Note: Conduct on the mailing list is subject to the Antitrust guidelines found at http://www.mpegif.org/public/documents/vault/mp-out-30042-Antitrust.php ******************Legal Disclaimer************************** "This email may contain confidential and privileged material for the sole use of the intended recipient. Any unauthorized review, use or distribution by others is strictly prohibited. If you have received the message in error, please advise the sender by reply email and delete the message. Thank you." **************************************************************** Yahoo! India Matrimony: Find your life partneronline. -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040910/60e77944/attachment-0001.html From mpeg_pat yahoo.co.in Fri Sep 10 08:06:58 2004 From: mpeg_pat yahoo.co.in (=?iso-8859-1?q?Pat=20M?=) Date: Fri Sep 10 09:45:14 2004 Subject: [Mp4-tech] Doubts in "skipped macroblocks" Message-ID: <20040910060658.44052.qmail@web8508.mail.in.yahoo.com> Hi Everybody, The concept of "skipped macroblocks" in MPEG-2 is not very clear for me. How does the decoder reconstructs a frame which has a "skipped macroblock" ? Please do send me the reply at the earliest. Thanks and regards, Pat. Yahoo! India Matrimony: Find your life partneronline. -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040910/042c02e7/attachment.html From ivan musiwave.com Fri Sep 10 17:00:54 2004 From: ivan musiwave.com (Ivan BABIC) Date: Sat Sep 11 11:23:34 2004 Subject: [Mp4-tech] AAC encapsulations In-Reply-To: <20040910060658.44052.qmail@web8508.mail.in.yahoo.com> Message-ID: Hi all , I'm starting a project where I need to encode WAV files to : MP4 AAC MP2 AAC 3GP AAC I used to work with Psytel for MP2 and Coding Tech. encoder for 3GP & MP4 . What I'm trying to do now is gain some time in the encoding task : As I understand all these formats are AAC LC , there is only an encapsulation change . So is there a command line encoder that I can use to rebuilt MP4 & 3GP header from a AAC MP2 file ? Thanks for help , Ivan From tma iis.fhg.de Fri Sep 10 17:25:09 2004 From: tma iis.fhg.de (Herbert Thoma) Date: Sat Sep 11 11:28:16 2004 Subject: [Mp4-tech] [video] obmc and interlaced in ASP In-Reply-To: <20040910053611.73464.qmail@web8501.mail.in.yahoo.com> References: <20040910053611.73464.qmail@web8501.mail.in.yahoo.com> Message-ID: <4141B945.2010108@iis.fhg.de> Rahul, You may want to take a look at the MPEG-4 Visual Implementers Guide List of Problem Reports: http://www.chiariglione.org/mpeg/working_documents/mpeg-04/visual/visual_implementers_guide.zip There a number of problems with conformance bitstreams are described. These problems will be addressed in the upcoming visual conformance corrigendum. Regards, Herbert ghvf jyg schrieb: > Thanks for the replies. I was stuck decoding the two streams mentioned > by Toshi Horie, and that set me thinking whether ASP supports OBMC or > not. Since these streams are supposed to be part of the conformance > test suite meant for ASP, how do I state that my decoder conforms to ASP > if it is not able to decode these streams. > Regards > Rahul > > */toshi.horie@conexant.com/* wrote: > > > Rahul, > > Most of your questions are answered in ISO 14496-2:2004 available > online at the following URL. > http://www.iso.ch/iso/en/CatalogueDetailPage.CatalogueDetail?CSNUMBER=39259 > > Advanced Simple Profile decoders can handle Advanced Simple Visual > Object Types and Simple Visual Object Types. Table 9-5 lists the > coding tools available for Advanced Simple Visual Object Type. > > I think Advanced Simple Profile does not support OBMC, even though > vcon-ge18.cmp and vcon-ge24.cmp seem to use it. /Someone please > corrrect me if I'm wrong./ Certainly Table 9-1 says that OBMC is > not supported for Simple Object Types, but it's not listed for > Advanced Simple Object Types in Table 9-4. > > There is a small note under Table 9-4 that says "The interlace tools > are not used for levels L0, L1, L2, and L3 of AS and FGS Profiles." > For other level restrictions, see Table N-4. > > All of the conformance streams for ASP should be available at the > Hannover ftp site accessed with the MPEG member login and password. > > Regards, > Toshi Horie > > > > *"ghvf jyg" * > Sent by: mp4-tech-bounces@lists.mpegif.org > > 09/09/2023 05:37 AM > > > To: mp4-tech@lists.mpegif.org > cc: > Subject: [Mp4-tech] [video] obmc and interlaced in ASP > > > > > Hi Everyone, > > I am working on Advanced Simple Profile (ASP). Does ASP support > overlapped motion compensation (OBMC), IIs interlaced support in ASP > is restricted to certain levels. Specifically where is this > information documented. > > I also want to know where I can find the complete s! et of > conformance streams for ASP. I could collect some from the > Conformance Streams CD from ISO (the old version), while I could get > some from the hannover ftp site. In all I have approximately 14-15 > of them, where can I find the remaining ones. > > I would appreciate any help on the above. > > Thanks and Regards > Rahul > > > *_Yahoo! India Matrimony_* > *:* > Find your life partner _online_ > ._______________________________________________ > NOTE: Please use clear subject lines for your posts. Include [audio, > [video], [systems], [general] or another apppropriate identifier to > indicate the type of question you have. > > Note: Conduct on the mailing list is subject to the Antitrust > guidelines found at > http://www.mpegif.org/public/documents/vault/mp-out-30042-Antitrust.php > > > > ******************Legal Disclaimer************************** > "This email may contain confidential and privileged material for the > sole use of the intended recipient. Any unauthorized review, use or > distribution by others is strictly prohibited. If you have received > the message in error, please advise the sender by reply email and > delete the message. Thank you." > **************************************************************** > > *Yahoo! India Matrimony* > *:* > Find your life partner online > . > > > > ------------------------------------------------------------------------ > > _______________________________________________ > NOTE: Please use clear subject lines for your posts. Include [audio, [video], [systems], [general] or another apppropriate identifier to indicate the type of question you have. > > Note: Conduct on the mailing list is subject to the Antitrust guidelines found at http://www.mpegif.org/public/documents/vault/mp-out-30042-Antitrust.php -- Herbert Thoma Group Manager Video Multimedia Realtime Systems Department Fraunhofer IIS Am Wolfsmantel 33, 91058 Erlangen, Germany Phone: +49-9131-776-323 Fax: +49-9131-776-399 email: tma@iis.fhg.de www: http://www.iis.fhg.de/ From uch email.it Fri Sep 10 17:30:45 2004 From: uch email.it (Uch) Date: Sat Sep 11 11:31:34 2004 Subject: [Mp4-tech] [video]quantization Message-ID: <967d90fcb98e19c4cb0055c36da828bf@80.105.50.243> Hi, i\'m an italian student. I\'m trying to implement the transform/scaling/quantization process with matlab. IAbout quantization parameter: i\'ve read lots of papers and the draft of the standard but i\'ve not understood which is the criterion adopted to choose the value of QPy or QSy between 0-51 (if i read right, only the initial value of QP is chosen in the quantization process and then the same initial value is used in the de-quantization process. Also i would ank you the difference between QPy and QSy in the standard and what the parameters pic_init_qp_minus26 and slice_qp_delta are ?? regards Uch -- Email.it, the professional e-mail, gratis per te: http://www.email.it/f Sponsor: Stanco di avere la casella piena? Risolvi i tuoi problemi di spazio con Email.it PRO100 avrai 100 MB di per spedire e ricevere ci? che vuoi Clicca qui: http://adv.email.it/cgi-bin/foclick.cgi?mid=1626&d=20040910 -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040910/c4a81eb4/attachment.html From kothari iitb.ac.in Sat Sep 11 04:27:43 2004 From: kothari iitb.ac.in (Abhishek D Kothari) Date: Sat Sep 11 11:35:27 2004 Subject: [Mp4-tech] Error resilient MPEG-4 decoder In-Reply-To: <200409101601.i8AG0cA7006344@lists1.magma.ca> References: <200409101601.i8AG0cA7006344@lists1.magma.ca> Message-ID: <32792.10.8.1.67.1094853463.squirrel@gpo.iitb.ac.in> Hi, I am looking for an MPEG4 decoder which can decode scalable video with errors in the enhancement layer. Presently, I am using MoMuSys but it crashes when i attempt to decode multiple layers with some bits dropped in the enhancement layer. Please suggest any possible help. Also, Is there any player which can play scalable video?? Regards, Abhishek From sweet_sober_smart yahoo.co.in Sat Sep 11 10:43:43 2004 From: sweet_sober_smart yahoo.co.in (=?iso-8859-1?q?ghvf=20jyg?=) Date: Sat Sep 11 11:39:01 2004 Subject: [Mp4-tech] [video] obmc and interlaced in ASP In-Reply-To: <4141B945.2010108@iis.fhg.de> Message-ID: <20040911084343.47792.qmail@web8506.mail.in.yahoo.com> Dear Herbert, Thanks for that information. During the testing of my simple profile decoder I found that the stream mit007.m4v (simple profile conformance test stream) has video_object_type_indication set to 0 which is supposed to be a reserved value. My decoder actually ensures that the stream should have this value set to 1. Is this a problem with the bitstream or should I remove that check from my decoder ? Thanks and Regards Rahul Herbert Thoma wrote:Rahul, You may want to take a look at the MPEG-4 Visual Implementers Guide List of Problem Reports: http://www.chiariglione.org/mpeg/working_documents/mpeg-04/visual/visual_implementers_guide.zip There a number of problems with conformance bitstreams are described. These problems will be addressed in the upcoming visual conformance corrigendum. Regards, Herbert ghvf jyg schrieb: > Thanks for the replies. I was stuck decoding the two streams mentioned > by Toshi Horie, and that set me thinking whether ASP supports OBMC or > not. Since these streams are supposed to be part of the conformance > test suite meant for ASP, how do I state that my decoder conforms to ASP > if it is not able to decode these streams. > Regards > Rahul > > */toshi.horie@conexant.com/* wrote: > > > Rahul, > > Most of your questions are answered in ISO 14496-2:2004 available > online at the following URL. > http://www.iso.ch/iso/en/CatalogueDetailPage.CatalogueDetail?CSNUMBER=39259 > > Advanced Simple Profile decoders can handle Advanced Simple Visual > Object Types and Simple Visual Object Types. Table 9-5 lists the > coding tools available for Advanced Simple Visual Object Type. > > I think Advanced Simple Profile does not support OBMC, even though > vcon-ge18.cmp and vcon-ge24.cmp seem to use it. /Someone please > corrrect me if I'm wrong./ Certainly Table 9-1 says that OBMC is > not supported for Simple Object Types, but it's not listed for > Advanced Simple Object Types in Table 9-4. > > There is a small note under Table 9-4 that says "The interlace tools > are not used for levels L0, L1, L2, and L3 of AS and FGS Profiles." > For other level restrictions, see Table N-4. > > All of the conformance streams for ASP should be available at the > Hannover ftp site accessed with the MPEG member login and password. > > Regards, > Toshi Horie > > > > *"ghvf jyg" * > Sent by: mp4-tech-bounces@lists.mpegif.org > > 09/09/2023 05:37 AM > > > To: mp4-tech@lists.mpegif.org > cc: > Subject: [Mp4-tech] [video] obmc and interlaced in ASP > > > > > Hi Everyone, > > I am working on Advanced Simple Profile (ASP). Does ASP support > overlapped motion compensation (OBMC), IIs interlaced support in ASP > is restricted to certain levels. Specifically where is this > information documented. > > I also want to know where I can find the complete s! et of > conformance streams for ASP. I could collect some from the > Conformance Streams CD from ISO (the old version), while I could get > some from the hannover ftp site. In all I have approximately 14-15 > of them, where can I find the remaining ones. > > I would appreciate any help on the above. > > Thanks and Regards > Rahul > > > *_Yahoo! India Matrimony_* > *:* > Find your life partner _online_ > ._______________________________________________ > NOTE: Please use clear subject lines for your posts. Include [audio, > [video], [systems], [general] or another apppropriate identifier to > indicate the type of question you have. > > Note: Conduct on the mailing list is subject to the Antitrust > guidelines found at > http://www.mpegif.org/public/documents/vault/mp-out-30042-Antitrust.php > > > > ******************Legal Disclaimer************************** > "This email may contain confidential and privileged material for the > sole use of the intended recipient. Any unauthorized review, use or > distribution by others is strictly prohibited. If you have received > the message in error, please advise the sender by reply email and > delete the message. Thank you." > **************************************************************** > > *Yahoo! India Matrimony* > *:* > Find your life partner online > . > > > > ------------------------------------------------------------------------ > > _______________________________________________ > NOTE: Please use clear subject lines for your posts. Include [audio, [video], [systems], [general] or another apppropriate identifier to indicate the type of question you have. > > Note: Conduct on the mailing list is subject to the Antitrust guidelines found at http://www.mpegif.org/public/documents/vault/mp-out-30042-Antitrust.php -- Herbert Thoma Group Manager Video Multimedia Realtime Systems Department Fraunhofer IIS Am Wolfsmantel 33, 91058 Erlangen, Germany Phone: +49-9131-776-323 Fax: +49-9131-776-399 email: tma@iis.fhg.de www: http://www.iis.fhg.de/ Yahoo! India Matrimony: Find your life partneronline. -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040911/6d5fa1f4/attachment.html From nso01r ecs.soton.ac.uk Sat Sep 11 14:16:25 2004 From: nso01r ecs.soton.ac.uk (Noor Othman) Date: Sat Sep 11 11:42:56 2004 Subject: [Mp4-tech] [audio]TWINVQ Message-ID: <4142EC99.5050605@ecs> Hello, I wonder if TWINVQ in "vm" of "refsoft980508" can still be used, or has it been obsoleted? I tried to use twinvq in "mp4AudVm" in ref software of (ISO/IEC 14496-5:2001) but it doesn't give a twinvq on its own. Can anyone help? Thank you. Noor From bulegato libero.it Sat Sep 11 16:51:37 2004 From: bulegato libero.it (Bule) Date: Sat Sep 11 11:46:08 2004 Subject: [Mp4-tech] Re: Mp4-tech Digest, Vol 14, Issue 14 References: <200409101601.i8AG0cA7006344@lists1.magma.ca> Message-ID: <001d01c49806$7610ba50$5f161997@master> Hi, I know the meaning of skipped macrobock for the new standard H.264 but i think it's the same also for MPEG-2. The decoder reconstructs the frame with the skipped macroblock replacing the skipped one with the macroblock in the same position which has already decoded from a previous frame. As a matter of fact a skipped macroblock is so defined if there is no motion for this from a frame to an other or if its motion vector can be derived from neighbouring macroblocks. I hope this helpful to you Luca ----- Original Message ----- From: To: Sent: Friday, September 10, 2023 6:01 PM Subject: Mp4-tech Digest, Vol 14, Issue 14 > Send Mp4-tech mailing list submissions to > mp4-tech@lists.mpegif.org > > To subscribe or unsubscribe via the World Wide Web, visit > http://lists.mpegif.org/mailman/listinfo/mp4-tech > or, via email, send a message with subject or body 'help' to > mp4-tech-request@lists.mpegif.org > > You can reach the person managing the list at > mp4-tech-owner@lists.mpegif.org > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Mp4-tech digest..." > > > Today's Topics: > > 1. Doubts in "skipped macroblocks" (Pat M) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Fri, 10 Sep 2023 07:06:58 +0100 (BST) > From: Pat M > Subject: [Mp4-tech] Doubts in "skipped macroblocks" > To: mp4-tech@lists.mpegif.org > Message-ID: <20040910060658.44052.qmail@web8508.mail.in.yahoo.com> > Content-Type: text/plain; charset="iso-8859-1" > > Hi Everybody, > > The concept of "skipped macroblocks" in MPEG-2 is not very clear for me. > > How does the decoder reconstructs a frame which has a "skipped macroblock" ? > > Please do send me the reply at the earliest. > > Thanks and regards, > Pat. > > Yahoo! India Matrimony: Find your life partneronline. > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: /pipermail/mp4-tech/attachments/20040910/042c02e7/attachment-0001.html > > ------------------------------ > > _______________________________________________ > Please use clear subject lines for your posts. Include [audio, [video], [systems], [general] or another apppropriate identifier to indicate the type of question you have. > > Conduct on the mailing list is subject to the Antitrust guidelines found at http://www.mpegif.org/public/documents/vault/mp-out-30042-Antitrust.php > > End of Mp4-tech Digest, Vol 14, Issue 14 > **************************************** > From lamachado inf.ufrgs.br Sat Sep 11 20:12:33 2004 From: lamachado inf.ufrgs.br (Leo) Date: Sun Sep 12 04:21:29 2004 Subject: [Mp4-tech] mpeg-4 samples files Message-ID: <1094940753.414378519cc69@webmail.inf.ufrgs.br> Hi, I would like to know where can I find mpeg-4 video files. It needs to have synthetic objects (made unsing BIFS) and natural objects in the same scene. thanks Leo ---------------------------------------------------------------- This message was sent using IMP, the Internet Messaging Program. From jone96_us yahoo.com Sun Sep 12 01:35:34 2004 From: jone96_us yahoo.com (Alfred) Date: Sun Sep 12 04:25:28 2004 Subject: [Mp4-tech] Optimized AAC-LC In-Reply-To: <413DD59A.60905@iis.fraunhofer.de> Message-ID: <20040912073534.93504.qmail@web52902.mail.yahoo.com> Hi all, Could anyone pl tell the Memory/MIPS requirements of the best optimized MPEG4 AAC-LC Decoder( stereo output) available on date. Ralph, could you also please throw some light on the fundamental limits on Memory/MIPS on the above decoder. Alfred --- Ralph Sperschneider wrote: > lisa wrote: > > > Hi Ralph, > > I did not check the reference decoder > software of ISO. I > > checked with faad2-0. > > > > As I earlier mentioned for the files am02_32.mp4 > to am02_96.mp4 there > > are small glitches that are coming on the right > channel(in the faad code). > > > > Can u please tell where the things CAN go wrong in > that code? > > In the sense that which part of the decoder is > being tested in that > > particular set of test vectors? > > In which module the problems can possibly occur > and for what possible > > reason? > > What are the things that affect the decoding of > the right channel?(in > > the sense that the left channel decodes properly) > > > > Thanks in advance > > With regards > > Lisa. > > > > > > > > On Tue, 07 Sep 2023 11:48:01 +0200, Ralph > Sperschneider > > wrote: > > > >> lisa wrote: > >> > >>> Hi all, > >>> I have doubt on the MPEG4AAC main profile > (audio) While > >>> decoding the test vectors > >>> am02_32.mp4 to am02_96.mp4 > >>> There are some small glitches coming on the > right channel. I > >>> guess thats why the RMS test fails. > >>> Can anyone help on that problem? Remaining > all test vectors are > >>> passing. > >>> thanx in advance > >>> lisa > >> > >> > >> > >> Hi Lisa, > >> > >> the current MPEG-4 Audio reference software > decoder has no problems > >> with these sequences. Which decoder are you > using? > >> > >> Best regards, > >> > >> Ralph > >> > > > > > > > > Hi Lisa, > > I am not familiar with faad. I even cannot see > something special which applies > only to these sequences. The sequence was intended > to test as many different > Huffman codewords from the spectrum Huffman > codebooks as possible (that is > called "arithmetic torture" in ISO/IEC 14496-4). > Maybe some seldom used Huffman > codes (eventually with some escape sequences) are > not correctly decoded by the > faad ... just a guess. > > Best regards, > > Ralph > > -- > Dipl.-Ing. Ralph Sperschneider | Phone: +49 9131 > 776 344 > Fraunhofer IIS | Fax: +49 9131 > 776 398 > Am Wolfsmantel 33 | > mailto:ralph.sperschneider@iis.fraunhofer.de > D 91058 Erlangen | > http://www.iis.fraunhofer.de/amm/ > _______________________________________________ > NOTE: Please use clear subject lines for your posts. > Include [audio, [video], [systems], [general] or > another apppropriate identifier to indicate the type > of question you have. > > Note: Conduct on the mailing list is subject to the > Antitrust guidelines found at > http://www.mpegif.org/public/documents/vault/mp-out-30042-Antitrust.php > _______________________________ Do you Yahoo!? Shop for Back-to-School deals on Yahoo! Shopping. http://shopping.yahoo.com/backtoschool From Wesley.DeNeve ugent.be Sun Sep 12 20:12:23 2004 From: Wesley.DeNeve ugent.be (Wesley De Neve) Date: Mon Sep 13 09:41:01 2004 Subject: [Mp4-tech] mpeg-4 samples files References: <1094940753.414378519cc69@webmail.inf.ufrgs.br> Message-ID: <065e01c498eb$abb4b5e0$0200a8c0@Persephone> Hi, Leo wrote: > Hi, I would like to know where can I find mpeg-4 video files. It > needs to have > synthetic objects (made unsing BIFS) and natural objects in the same > scene. You could have a look at the GPAC regression test suite, available on the following URL: http://gpac.sourceforge.net/downloads.php http://gpac.sourceforge.net/auth_files.php You can also download a sample file, meeting your requirements, from the following URL: http://multimedialab.elis.ugent.be/h2ocean/movie.asp Best regards, -Wesley De Neve From ralph.sperschneider iis.fraunhofer.de Mon Sep 13 12:35:26 2004 From: ralph.sperschneider iis.fraunhofer.de (Ralph Sperschneider) Date: Mon Sep 13 09:45:15 2004 Subject: [Mp4-tech] Re: Optimized AAC-LC In-Reply-To: <20040912073534.93504.qmail@web52902.mail.yahoo.com> References: <20040912073534.93504.qmail@web52902.mail.yahoo.com> Message-ID: <414569DE.3090301@iis.fraunhofer.de> Alfred wrote: > Hi all, > Could anyone pl tell the Memory/MIPS requirements of > the best optimized MPEG4 AAC-LC Decoder( stereo > output) available on date. > Ralph, could you also please throw some light on the > fundamental limits on Memory/MIPS on the above > decoder. > Alfred > ISO/IEC 14496-3 says (1.5.2.2 Complexity units): ER AAC LC @ 48 kHz: PCU (MOPS): 3 (PCU proportional to sampling frequency) RCU : 3 PCU (?Processor Complexity Units?) values are given in MOPS per channel, RCU (?RAM Complexity Units?) values in kWords per channel. Best regards, Ralph -- Dipl.-Ing. Ralph Sperschneider | Phone: +49 9131 776 344 Fraunhofer IIS | Fax: +49 9131 776 398 Am Wolfsmantel 33 | mailto:ralph.sperschneider@iis.fraunhofer.de D 91058 Erlangen | http://www.iis.fraunhofer.de/amm/ From Ilan.Daniel Adimos.com Mon Sep 13 15:39:35 2004 From: Ilan.Daniel Adimos.com (Ilan Daniel) Date: Mon Sep 13 09:48:33 2004 Subject: [Mp4-tech] [video] Intra Prediction Message-ID: <2A01AFD68E343242BA2C748A5E1A733D294CE6@jerry.Adimos.com> Hi, I understand that the encoder has several Intra Prediction modes to choose from, can the encoder decide not to predict at all ? (using constant 128 level prediction, like in edges MBs). thanks, Ilan Daniel -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040913/c7454531/attachment.html From woodsp us.ibm.com Mon Sep 13 11:16:03 2004 From: woodsp us.ibm.com (Steve Wood) Date: Mon Sep 13 14:53:33 2004 Subject: [Mp4-tech] mpeg-4 samples files In-Reply-To: <1094940753.414378519cc69@webmail.inf.ufrgs.br> Message-ID: > Hi, I would like to know where can I find mpeg-4 video files. It needs to have > synthetic objects (made unsing BIFS) and natural objects in the same scene. > thanks > Leo Leo, you can find a number of samples, plus a tutorial on how to create a scene with BIFS (MPEG-4 Systems) in the form of downloadable packages as part of the 'IBM Toolkit for MPEG-4' on alphaWorks at http://www.alphaworks.ibm.com/tech/tk4mpeg4 There is also authoring to allow you to create your own scenes and of course a player to play them back. Regards, Steve Wood Composite Media Technologies Group IBM TJ Watson Research, 19 Skyline Drive, Hawthorne, NY 10532. USA -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040913/7dc48f15/attachment.html From bautz tin.it Mon Sep 13 22:01:08 2004 From: bautz tin.it (stefano battista) Date: Mon Sep 13 15:45:28 2004 Subject: [Mp4-tech] [video] Intra Prediction References: <2A01AFD68E343242BA2C748A5E1A733D294CE6@jerry.Adimos.com> Message-ID: <003201c499c4$07a8f6d0$730b3152@Bsoft004> [video] Intra Predictionhi Ilan-- of course the encoder can choose to always use the "average" prediciton mode every time it encodes an Intra Macroblock, provided it signals that using the correct H264 syntax... it will be less efficient than a better encoding strategy :) --Stefano --Stefano Battista bSoft -- www.bsoft.info tel/fax +39-0733-261845 mobile +39-335-7213624 ----- Original Message ----- From: Ilan Daniel To: mp4-tech@lists.mpegif.org Sent: Monday, September 13, 2023 2:39 PM Subject: [Mp4-tech] [video] Intra Prediction Hi, I understand that the encoder has several Intra Prediction modes to choose from, can the encoder decide not to predict at all ? (using constant 128 level prediction, like in edges MBs). thanks, Ilan Daniel ------------------------------------------------------------------------------ _______________________________________________ NOTE: Please use clear subject lines for your posts. Include [audio, [video], [systems], [general] or another apppropriate identifier to indicate the type of question you have. Note: Conduct on the mailing list is subject to the Antitrust guidelines found at http://www.mpegif.org/public/documents/vault/mp-out-30042-Antitrust.php -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040913/b06e41db/attachment.html From garysull windows.microsoft.com Mon Sep 13 15:07:10 2004 From: garysull windows.microsoft.com (Gary Sullivan) Date: Mon Sep 13 19:11:13 2004 Subject: [Mp4-tech] [video] Intra Prediction Message-ID: <91D7F2CEE3425A4A9D11311D09FCE2460AE2E20D@WIN-MSG-10.wingroup.windeploy.ntdev.microsoft.com> But the DC mode uses some degree of prediction too. I don't think there is a way to turn off prediction completely when using H.264/AVC, except to code every macroblock in a separate slice or do something similar to that by FMO use. I think the same is true for MPEG-2. The DC coefficient must be predicted. I believe H.263 (without use of Annex I) and H.261 don't use intra MB prediction. But why would you not want to use prediction? -Gary Sullivan ________________________________ From: mp4-tech-bounces@lists.mpegif.org [mailto:mp4-tech-bounces@lists.mpegif.org] On Behalf Of stefano battista Sent: Monday, September 13, 2023 12:01 PM To: Ilan Daniel; mp4-tech@lists.mpegif.org Subject: Re: [Mp4-tech] [video] Intra Prediction hi Ilan-- of course the encoder can choose to always use the "average" prediciton mode every time it encodes an Intra Macroblock, provided it signals that using the correct H264 syntax... it will be less efficient than a better encoding strategy :) --Stefano --Stefano Battista bSoft -- www.bsoft.info tel/fax +39-0733-261845 mobile +39-335-7213624 ----- Original Message ----- From: Ilan Daniel To: mp4-tech@lists.mpegif.org Sent: Monday, September 13, 2023 2:39 PM Subject: [Mp4-tech] [video] Intra Prediction Hi, I understand that the encoder has several Intra Prediction modes to choose from, can the encoder decide not to predict at all ? (using constant 128 level prediction, like in edges MBs). thanks, Ilan Daniel ________________________________ _______________________________________________ NOTE: Please use clear subject lines for your posts. Include [audio, [video], [systems], [general] or another apppropriate identifier to indicate the type of question you have. Note: Conduct on the mailing list is subject to the Antitrust guidelines found at http://www.mpegif.org/public/documents/vault/mp-out-30042-Antitrust.php -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040913/13ef6223/attachment.html From mpeg_pat yahoo.co.in Tue Sep 14 05:38:12 2004 From: mpeg_pat yahoo.co.in (=?iso-8859-1?q?Pat=20M?=) Date: Wed Sep 15 08:27:38 2004 Subject: [Mp4-tech] Motion Vector Prediction Message-ID: <20040914033812.2918.qmail@web8503.mail.in.yahoo.com> Hi Everyone, 1.How is "Differential Motion Vector" encoding done in MPEG-2 ? 2. How do we predict the current motion vector based on the previous motion vectors? 3. What is the "mathematics" involved behind this ?(is it a simple difference or more than that) Kindly send me the answers to the above questions with some brief examples. Thanks and regards, Pat. M Yahoo! India Matrimony: Find your life partneronline. -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040914/1a7e4f30/attachment.html From garysull windows.microsoft.com Mon Sep 13 22:31:55 2004 From: garysull windows.microsoft.com (Gary Sullivan) Date: Wed Sep 15 08:30:07 2004 Subject: [Mp4-tech] RE: Motion Vector Prediction Message-ID: <91D7F2CEE3425A4A9D11311D09FCE2460AEB5156@WIN-MSG-10.wingroup.windeploy.ntdev.microsoft.com> These aren't especially simple questions if you're looking for a fully complete answer, although they're simpler when you ask about MPEG-2 than if you asked about newer standards. The simple answer is that in MPEG-2 you use the value of the motion vector for the macroblock to the left of the current macroblock as the prediction of the value of the motion vector for the current macroblock. The encoder then sends the difference from that prediction value (one offset for the horizontal dimension and one for the vertical dimension). That's the simple explanation. But what if the macroblock to the left is coded as "intra", so it doesn't have a motion vector? What if the macroblock to the left is "skipped" (i.e., nothing is sent for it)? Now don't forget about B pictures. Some macroblocks in a B picture will have two motion vectors (for "forward" and "backward" prediction) -- and some of them will have only one, and some of them won't have any. Now think about interlace. There are field pictures and frame pictures and in frame pictures there may be switching between frame and field processing on a per-macroblock basis. If the current macroblock is a frame macroblock and the macroblock to the left is a field macroblock, now what? How about vice-versa? Then there's also 16x8 motion too. What if it's interlaced and it's a B picture too? And finally, the bane of all MPEG-2 implementers, the dreaded Dual Prime. There's all sorts of nit-picky little details, but it's basically pretty straightforward when you think it all through. Best Regards, Gary Sullivan ________________________________ From: Pat M [mailto:mpeg_pat@yahoo.co.in] Sent: Monday, September 13, 2023 8:38 PM To: mp4-tech@lists.mpegif.org Cc: Gary Sullivan Subject: Motion Vector Prediction Hi Everyone, 1.How is "Differential Motion Vector" encoding done in MPEG-2 ? 2. How do we predict the current motion vector based on the previous motion vectors? 3. What is the "mathematics" involved behind this ?(is it a simple difference or more than that) Kindly send me the answers to the above questions with some brief examples. Thanks and regards, Pat. M Yahoo! India Matrimony : Find your life partner online . -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040913/7af81365/attachment.html From Ilan.Daniel Adimos.com Tue Sep 14 13:12:28 2004 From: Ilan.Daniel Adimos.com (Ilan Daniel) Date: Wed Sep 15 08:32:24 2004 Subject: [Mp4-tech] [video] Intra Prediction Message-ID: <2A01AFD68E343242BA2C748A5E1A733D294CEA@jerry.Adimos.com> thanks Gary for your answer, this is what I suspected - the only way for not using any prediction is by using slice per MB. "But why would you not want to use prediction?" in some cases the best prediction is "no prediction", same as an MB in P slice that in some cases it is better to encode it as Intra MB. I understand that those cases are not frequent ..... -----Original Message----- From: Gary Sullivan [mailto:garysull@windows.microsoft.com] Sent: Monday, September 13, 2023 11:07 PM To: stefano battista; Ilan Daniel; mp4-tech@lists.mpegif.org Subject: RE: [Mp4-tech] [video] Intra Prediction But the DC mode uses some degree of prediction too. I don't think there is a way to turn off prediction completely when using H.264/AVC, except to code every macroblock in a separate slice or do something similar to that by FMO use. I think the same is true for MPEG-2. The DC coefficient must be predicted. I believe H.263 (without use of Annex I) and H.261 don't use intra MB prediction. But why would you not want to use prediction? -Gary Sullivan _____ From: mp4-tech-bounces@lists.mpegif.org [mailto:mp4-tech-bounces@lists.mpegif.org] On Behalf Of stefano battista Sent: Monday, September 13, 2023 12:01 PM To: Ilan Daniel; mp4-tech@lists.mpegif.org Subject: Re: [Mp4-tech] [video] Intra Prediction hi Ilan-- of course the encoder can choose to always use the "average" prediciton mode every time it encodes an Intra Macroblock, provided it signals that using the correct H264 syntax... it will be less efficient than a better encoding strategy :) --Stefano --Stefano Battista bSoft -- www.bsoft.info tel/fax +39-0733-261845 mobile +39-335-7213624 ----- Original Message ----- From: Ilan Daniel To: mp4-tech@lists.mpegif.org Sent: Monday, September 13, 2023 2:39 PM Subject: [Mp4-tech] [video] Intra Prediction Hi, I understand that the encoder has several Intra Prediction modes to choose from, can the encoder decide not to predict at all ? (using constant 128 level prediction, like in edges MBs). thanks, Ilan Daniel _____ _______________________________________________ NOTE: Please use clear subject lines for your posts. Include [audio, [video], [systems], [general] or another apppropriate identifier to indicate the type of question you have. Note: Conduct on the mailing list is subject to the Antitrust guidelines found at http://www.mpegif.org/public/documents/vault/mp-out-30042-Antitrust.php -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040914/5563ca51/attachment.html From mpeg_pat yahoo.co.in Tue Sep 14 12:18:11 2004 From: mpeg_pat yahoo.co.in (=?iso-8859-1?q?Pat=20M?=) Date: Wed Sep 15 08:35:12 2004 Subject: [Mp4-tech] CAVLC and CABAC Message-ID: <20040914101811.93767.qmail@web8510.mail.in.yahoo.com> Hi Everybody, Where can I find good and comprehensive literature on CAVLC and CABAC ? (apart from Iain.G. Richardson book for MPEG-4/H.264) Thanks and regards, Pat. Yahoo! India Matrimony: Find your life partneronline. -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040914/8bd7c061/attachment.html From ds_sunitha rediffmail.com Tue Sep 14 12:18:46 2004 From: ds_sunitha rediffmail.com (Sunitha DS) Date: Wed Sep 15 08:37:38 2004 Subject: [Mp4-tech] CRC implementation in ADTS header Message-ID: <20040914111842.15756.qmail@webmail17.rediffmail.com> An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040914/f71fbcda/attachment-0001.html -------------- next part -------------- Hello, Any one can help me in providing the following details. I need to implement the CRC value in the AAC decoder side for ADTS encoded stream. CRC field is present in the ADTS header, but i want to find the CRC value based on the ADTS stream data, Please help me how to find the CRC value based on the ADTS stream on the decoder side. this is most urgent for me. pls help me in resolving this issue. regards Sunitha From ds_sunitha rediffmail.com Tue Sep 14 15:41:50 2004 From: ds_sunitha rediffmail.com (Sunitha DS) Date: Wed Sep 15 08:39:33 2004 Subject: [Mp4-tech] LTP test streams Message-ID: <20040914144143.20690.qmail@webmail28.rediffmail.com> An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040914/b1b81a7c/attachment.html -------------- next part -------------- Please give me the info where I will get the LTP test streams for testing the AAC LD decoder. regards Snitha From garysull windows.microsoft.com Tue Sep 14 12:09:17 2004 From: garysull windows.microsoft.com (Gary Sullivan) Date: Wed Sep 15 08:41:49 2004 Subject: [Mp4-tech] RE: CAVLC and CABAC Message-ID: <91D7F2CEE3425A4A9D11311D09FCE2460AEB550B@WIN-MSG-10.wingroup.windeploy.ntdev.microsoft.com> For CAVLC, I think if you start with Richardon's book or his web white papers and then just read the standard itself in detail, that should suffice. All of CAVLC is contained in only about five or six pages of text in the standard, plus some tables. (subclauses 7.3.5.3.1, 7.4.5.3.1, and 9.2). For CABAC, the following paper is probably the most authoritative source outside of the standard itself: Detlev Marpe , Heiko Schwarz, and Thomas Wiegand: Context-Based Adaptive Binary Arithmetic Coding in the H.264/AVC Video Compression Standard, IEEE Transactions on Circuits and Systems for Video Technology, July 2003. That is available at http://bs.hhi.de/~wiegand/publications.html. It may also be a good idea to get a copy of the JVT's JM text document from the JVT ftp site. Best Regards, Gary Sullivan ________________________________ From: Pat M [mailto:mpeg_pat@yahoo.co.in] Sent: Tuesday, September 14, 2023 3:18 AM To: mp4-tech@lists.mpegif.org Cc: Gary Sullivan Subject: CAVLC and CABAC Hi Everybody, Where can I find good and comprehensive literature on CAVLC and CABAC ? (apart from Iain.G. Richardson book for MPEG-4/H.264) Thanks and regards, Pat. Yahoo! India Matrimony : Find your life partner online . -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040914/b50a1ed7/attachment.html From tma iis.fhg.de Wed Sep 15 15:21:00 2004 From: tma iis.fhg.de (Herbert Thoma) Date: Wed Sep 15 11:25:23 2004 Subject: [Mp4-tech] [video] obmc and interlaced in ASP In-Reply-To: <20040911084343.47792.qmail@web8506.mail.in.yahoo.com> References: <20040911084343.47792.qmail@web8506.mail.in.yahoo.com> Message-ID: <414833AC.3090503@iis.fhg.de> Dear Rahul, in my opinion this is a problem with the bitstream. However, I would not build a decoder that is so strict ... I informed Yi-Shin Tung who is the editor of the MPEG-4 Visual Implementers Guide List of Problem Reports document about the problem with this conformance bitstream. Regards, Herbert. ghvf jyg schrieb: > Dear Herbert, > > Thanks for that information. During the testing of my simple profile > decoder I found that the stream mit007.m4v (simple profile conformance > test stream) has video_object_type_indication set to 0 which is supposed > to be a reserved value. My decoder actually ensures that the stream > should have this value set to 1. Is this a problem with the bitstream or > should I remove that check from my decoder ? > > Thanks and Regards > > Rahul > > > > > > */Herbert Thoma /* wrote: > > Rahul, > > You may want to take a look at the MPEG-4 Visual Implementers Guide > List of Problem Reports: > > http://www.chiariglione.org/mpeg/working_documents/mpeg-04/visual/visual_implementers_guide.zip > > There a number of problems with conformance bitstreams are > described. These problems will > be addressed in the upcoming visual conformance corrigendum. > > Regards, > Herbert > > ghvf jyg schrieb: > > Thanks for the replies. I was stuck decoding the two streams > mentioned > > by Toshi Horie, and that set me thinking whether ASP supports > OBMC or > > not. Since these streams are supposed to be part of the conformance > > test suite meant for ASP, how do I state that my decoder conforms > to ASP > > if it is not able to decode these streams. > > Regards > > Rahul > > > > */toshi.horie@conexant.com/* wrote: > > > &! gt; > > Rahul, > > > > Most of your questions are answered in ISO 14496-2:2004 available > > online at the following URL. > > > http://www.iso.ch/iso/en/CatalogueDetailPage.CatalogueDetail?CSNUMBER=39259 > > > > Advanced Simple Profile decoders can handle Advanced Simple Visual > > Object Types and Simple Visual Object Types. Table 9-5 lists the > > coding tools available for Advanced Simple Visual Object Type. > > > > I think Advanced Simple Profile does not support OBMC, even though > > vcon-ge18.cmp and vcon-ge24.cmp seem to use it. /Someone please > > corrrect me if I'm wrong./ Certainly Table 9-1 says that OBMC is > > not supported for Simple Object Types, but it's not listed for > > Advanced Simple Object Types in Table 9-4. > > > > There is a small note under Table 9-4 that says "The interlace tools > > are not used for levels L0, L1, L2, and L3 of AS and FGS Profiles." > > For other level restrictions, see Table N-4. > > > > All of the conformance streams for ASP should be available at the > > Hannover ftp site accessed with the MPEG member login and password. > > > > Regards, > > Toshi Horie > > > > > > > > *"ghvf jyg" * > > Sent by: mp4-tech-bounces@lists.mpegif.org > > > > 09/09/2023 05:37 AM > > > > > > To: mp4-tech@lists.mpegif.org > > cc: > > Subject: [Mp4-tech] [video] obmc and interlaced in ASP > > > > > > > > > > Hi Everyone, > > > > I am working on Advanced Simple Profile (ASP). Does ASP support > > overlapped motion compensation (OBMC), IIs interlaced support in ASP > > is restricted to certain levels. Specifically where is this > > information documented. > > > > I also want to know where I can find the complete s! et of > > conformance streams for ASP. I could collect some from the > > Conformance Streams CD from ISO (the old version), while I could get > > some from the hannover ftp site. In all I have approximately 14-15 > > of them, where can I find the remaining ones. > > > > I would appreciate any help on the above. > > > > Thanks and Regards > > Rahul > > > > > > *_Yahoo! India Matrimony_* > > *:* > > Find your life partner _online_ > > ._______________________________________________ > > NOTE: Please use clear subject lines for your posts. Include [audio, > > [video], [systems], [general] or another apppropriate identifier to > > indicate the type of question you have. > > > > Note: Conduct on the mailing list is subject to the Antitrust > > guidelines found at > > > http://www.mpegif.org/public/documents/vault/mp-out-30042-Antitrust.php > > > > > > > > ******************Legal Disclaimer************************** > > "This email may contain confidential and privileged material for the > > sole use of the intended recipient. Any unauthorized review, use or > > distribution by others is strictly prohibited. If you have received > > the message in error, please advise the sender by reply email and > > delete the message. Thank you." > > **************************************************************** > > > > *Yahoo! India Matrimony* > > *:* > > Find your life partner online > > . > > > > > > > > > ------------------------------------------------------------------------ > > > > _______________________________________________ > > NOTE: Please use clear subject lines for your posts. Include > [audio, [video], [systems], [general] or another apppropriate > identifier to indicate the type of question you have. > > > > Note: Conduct on the mailing list is subject to the Antitrust > guidelines found at > http://www.mpegif.org/public/documents/vault/mp-out-30042-Antitrust.php > > -- > Herbert Thoma > Group Manager Video > Multimedia Realtime Systems Department > Fraunhofer IIS > Am Wolfsmantel 33, 91058 Erlangen, Germany > Phone: +49-9131-776-323 > Fax: +49-9131-776-399 > email: tma@iis.fhg.de > www: http://www.iis.fhg.de/ > > *Yahoo! India Matrimony* > *:* > Find your life partner online > . > > -- Herbert Thoma Group Manager Video Multimedia Realtime Systems Department Fraunhofer IIS Am Wolfsmantel 33, 91058 Erlangen, Germany Phone: +49-9131-776-323 Fax: +49-9131-776-399 email: tma@iis.fhg.de www: http://www.iis.fhg.de/ From ralph.sperschneider iis.fraunhofer.de Wed Sep 15 15:52:59 2004 From: ralph.sperschneider iis.fraunhofer.de (Ralph Sperschneider) Date: Wed Sep 15 11:30:31 2004 Subject: [Mp4-tech] Re: Query about AAC SamplingFrequencyIndex and objectType In-Reply-To: <413EAEAA.8135457E@noida.interrasystems.com> References: <413EAEAA.8135457E@noida.interrasystems.com> Message-ID: <41483B2B.2060608@iis.fraunhofer.de> Subhadeep Chatterjee wrote: > Hello everybody, > > I have a few questions about aac. > > 1. In AudioSpecificConfig samplingFrequencyIndex comes. If > channelConfiguration is 0 then another samplingFrequencyIndex comes in > PCE. Then which value should we take? > > 2. If the two values are not same, is this considered an error in > bitstream? > > 3. Again the same questions arise for audioObjectType in > AudioSpecificConfig and ObjectType in PCE. > > 4. What will happen if samplingFrequencyIndex has a value of 0xF in PCE? > > Thanks in advance. > > Regards > Subhadeep Chatterjee > Please check out ISO/IEC 14496-4, where it says in "6.6.4.1.2.1.3 program_config_element()": object_type: shall match the AudioObjectType within AudioSpecificConfig sampling_frequency_index: shall match the samplingFrequencyIndex within AudioSpecificConfig Those values are simply redundant in the PCE. They shall match the settings in the ASC, but otherwise can be ignored. Best regards, Ralph -- Dipl.-Ing. Ralph Sperschneider | Phone: +49 9131 776 344 Fraunhofer IIS | Fax: +49 9131 776 398 Am Wolfsmantel 33 | mailto:ralph.sperschneider@iis.fraunhofer.de D 91058 Erlangen | http://www.iis.fraunhofer.de/amm/ From garysull windows.microsoft.com Wed Sep 15 11:02:28 2004 From: garysull windows.microsoft.com (Gary Sullivan) Date: Wed Sep 15 15:32:26 2004 Subject: [Mp4-tech] RE: Doubts regarding skipped macroblocks Message-ID: <91D7F2CEE3425A4A9D11311D09FCE2460AF17877@WIN-MSG-10.wingroup.windeploy.ntdev.microsoft.com> 1. I think the answer is No, since skipped macroblocks are a type of P (i.e., inter-picture predicted) macroblock. 2. Yes, I think that is possible. ________________________________ From: Tom P [mailto:mpeg2_user@yahoo.com] Sent: Wednesday, September 15, 2023 3:51 AM To: Gary Sullivan Cc: mp4-tech@lists.mpegif.org Subject: Doubts regarding skipped macroblocks Hi Everybody, 1. Why are "skipped macroblocks" not allowed in I-pictures in MPEG-2? 2. Is it not possible that all the quantized DCT coefficients to be zero for some macroblocks of an I-picture? Please do send me the answers to the above questions. Thanks in advance. Tom ________________________________ Do you Yahoo!? vote.yahoo.com - Register online to vote today! -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040915/c34cc331/attachment.html From lhq haiersoft.com.cn Thu Sep 16 17:56:15 2004 From: lhq haiersoft.com.cn (=?gb2312?B?u6rG5g==?=) Date: Thu Sep 16 06:46:38 2004 Subject: [Mp4-tech] Where can i find the whole code of mpeg-4 decode and encode. Message-ID: <200409160856.i8G8uE2f009492@lists1.magma.ca> hi, i am beginning to learn mpeg-4 just several days, and i want to anaylize some sample code so that i can grasp the mpeg-4 fast. but i can't find the whole code including the tutoril documents. i will appreciate if you can tell you. thanks a lot in advance! best wishes! Eric ���������������� ����������������lhq@haiersoft.com.cn ��������������������2004-09-16 From srinivas.mastyaraj skyworksinc.com Thu Sep 16 17:52:49 2004 From: srinivas.mastyaraj skyworksinc.com (srinivas.mastyaraj@skyworksinc.com) Date: Thu Sep 16 09:15:00 2004 Subject: [Mp4-tech] Where can i find the whole code of mpeg-4 decode and encode. Message-ID: Source code for MPEG-4 is available at http://ffmpeg.sourceforge.net/ Regards MSRao "����" Sent by: mp4-tech-bounces@lists.mpegif.org 09/16/2004 02:26 PM To: "mp4-tech" <> cc: Subject: [Mp4-tech] Where can i find the whole code of mpeg-4 decode and encode. hi, i am beginning to learn mpeg-4 just several days, and i want to anaylize some sample code so that i can grasp the mpeg-4 fast. but i can't find the whole code including the tutoril documents. i will appreciate if you can tell you. thanks a lot in advance! best wishes! Eric ���������������� ����������������lhq@haiersoft.com.cn ��������������������2004-09-16 _______________________________________________ NOTE: Please use clear subject lines for your posts. Include [audio, [video], [systems], [general] or another apppropriate identifier to indicate the type of question you have. Note: Conduct on the mailing list is subject to the Antitrust guidelines found at http://www.mpegif.org/public/documents/vault/mp-out-30042-Antitrust.php -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040916/f2ef45e9/attachment.html From ralph.sperschneider iis.fraunhofer.de Thu Sep 16 15:55:26 2004 From: ralph.sperschneider iis.fraunhofer.de (Ralph Sperschneider) Date: Thu Sep 16 09:17:00 2004 Subject: [Mp4-tech] Re: [audio] AAC LD test sequences testing LTP In-Reply-To: <20040914144143.20690.qmail@webmail28.rediffmail.com> References: <20040914144143.20690.qmail@webmail28.rediffmail.com> Message-ID: <41498D3E.2050107@iis.fraunhofer.de> Sunitha DS wrote: > Please give me the info where I will get the LTP test streams for testing the AAC LD decoder. > > regards > Snitha > > Look for er_ad* in subdir 'compressedMP4' and 'referencesWav' at ftp://mpaudconf:adif2mp4@ftp.iis.fraunhofer.de/mpeg4audio-conformance/ Except for er_ad109, LTP is used where the encoder found it appropriate. Best regards, Ralph -- Dipl.-Ing. Ralph Sperschneider | Phone: +49 9131 776 344 Fraunhofer IIS | Fax: +49 9131 776 398 Am Wolfsmantel 33 | mailto:ralph.sperschneider@iis.fraunhofer.de D 91058 Erlangen | http://www.iis.fraunhofer.de/amm/ From Danijel.Domazet zg.htnet.hr Fri Sep 17 17:34:29 2004 From: Danijel.Domazet zg.htnet.hr (D.Domazet) Date: Fri Sep 17 15:15:03 2004 Subject: [Mp4-tech][audio] Paper: "Increased efficiency MPEG-2 AAC Encoding"? References: <20040914144143.20690.qmail@webmail28.rediffmail.com> <41498D3E.2050107@iis.fraunhofer.de> Message-ID: <000c01c49cc3$70db9110$1b02fea9@FREZA> Hi Mp4tech, I'd appreciate it very much if someone could point me to AES paper (other than www.aes.org): Title: "Increased efficiency MPEG-2 AAC Encoding" Authors: Smithers, Michael J.; Fellers, Matt C. AES Convention: 111 (November 2001) Preprint Number: 5490 E-lib Location: (CD aes18) /pp2001/pp0112/111038.pdf Thanks, Daniel From f.fakhrieh ece.ut.ac.ir Mon Sep 20 14:24:20 2004 From: f.fakhrieh ece.ut.ac.ir (f.fakhrieh@ece.ut.ac.ir) Date: Mon Sep 20 09:08:31 2004 Subject: [Mp4-tech] finding a new algorithm Message-ID: <21256.194.225.0.15.1095670460.squirrel@shahab.ut.ac.ir> Dear all experts, My friend is looking for a topic for his thesis. He specaily intersted in data conpression algorithm do any one can guid him. we want to know why we can improve data compression algorithm of MPEG thanks From Ilan.Daniel Adimos.com Sun Sep 19 10:50:46 2004 From: Ilan.Daniel Adimos.com (Ilan Daniel) Date: Mon Sep 20 09:12:03 2004 Subject: [Mp4-tech] [system] MPEG4-AVC inside MPEG2 TS ? Message-ID: <2A01AFD68E343242BA2C748A5E1A733D294CF5@jerry.Adimos.com> Hi, can MPEG2 TS contain MPEG4-AVC ? and what about other "MPEG" video ? MPEG1 video ? MPEG4 video ? and what about "non MPEG" video like the VC-9 ? Ilan Daniel Adimos Atirey Yeda 17 Kfar Saba Israel ilan.daniel@adimos.com tel: +972-9-7630003 mobile: +972-544-508695 -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040919/04c4bfd0/attachment.html From gedrozia yahoo.com Sun Sep 19 03:06:29 2004 From: gedrozia yahoo.com (Mehdi Sharifi) Date: Mon Sep 20 09:15:55 2004 Subject: [Mp4-tech] AMR payload&Storage In-Reply-To: <20040914101811.93767.qmail@web8510.mail.in.yahoo.com> Message-ID: <20040919090629.81358.qmail@web41601.mail.yahoo.com> Hi , format of AMR in storage is abit different from in payload . is there any source code that I can use to convert payload format to storage format ? thanx --mehdi --------------------------------- Do you Yahoo!? Yahoo! Mail Address AutoComplete - You start. We finish. -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040919/e1320a8f/attachment.html From wkkang dslab.hanyang.ac.kr Mon Sep 20 14:59:02 2004 From: wkkang dslab.hanyang.ac.kr (=?EUC-KR?Q?=B0=AD=BF=F8=B0=E6?=) Date: Mon Sep 20 10:18:10 2004 Subject: [Mp4-tech] Momusys software Message-ID: <200409200459.i8K4xiLL009861@lists1.magma.ca> An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040920/b17e0d96/attachment.html From Martin.Davies radioscape.com Mon Sep 20 15:33:06 2004 From: Martin.Davies radioscape.com (Davies, Martin) Date: Mon Sep 20 10:21:43 2004 Subject: [Mp4-tech] [system] MPEG4-AVC inside MPEG2 TS ? Message-ID: <5D139685F337FC44A97D330F8F1BF6FA09EAF9@MORSE> Yes, it can contain MPEG-4 AVC streams, as long as an MPEG-4 Synchronisation layer is used before packaging it inside a PES. The DMB standard uses MPEG-4 streams inside an MPEG-2TS. Martin -----Original Message----- From: Ilan Daniel [mailto:Ilan.Daniel@Adimos.com] Sent: 19 September 2023 08:51 To: mp4-tech@lists.mpegif.org Subject: [Mp4-tech] [system] MPEG4-AVC inside MPEG2 TS ? Hi, can MPEG2 TS contain MPEG4-AVC ? and what about other "MPEG" video ? MPEG1 video ? MPEG4 video ? and what about "non MPEG" video like the VC-9 ? Ilan Daniel Adimos Atirey Yeda 17 Kfar Saba Israel ilan.daniel@adimos.com tel: +972-9-7630003 mobile: +972-544-508695 ********************************************************************** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify postmaster@radioscape.com. This footnote also confirms that this email message has been scanned for the presence of computer viruses known at the time of sending. www.radioscape.com ********************************************************************** -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040920/c077d853/attachment.html From gedrozia yahoo.com Mon Sep 20 07:36:40 2004 From: gedrozia yahoo.com (Mehdi Sharifi) Date: Mon Sep 20 10:25:01 2004 Subject: [Mp4-tech] AMR payload&Storage format Message-ID: <20040920133640.90381.qmail@web41602.mail.yahoo.com> Hi dear all, format of AMR in storage is abit different from it's format in payload or streaming . is there any source code that I can use to convert payload format to storage format ? thanx --mehdi --------------------------------- Do you Yahoo!? New and Improved Yahoo! Mail - 100MB free storage! -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040920/56bafae3/attachment.html From mihir ti.com Mon Sep 20 20:19:19 2004 From: mihir ti.com (Mody, Mihir) Date: Mon Sep 20 10:29:14 2004 Subject: [Mp4-tech] [system] MPEG4-AVC inside MPEG2 TS ? Message-ID: <0908EAA859AF3641B7D9BEDAB8DD6A742F7A6E@dbde2k01.itg.ti.com> Hi Ilan, Please refer to ITU-T recommendation for H.222, Amendment 3, 2004 : Transport of AVC data over ISO/IEC 13818-1/ H.222.0 for MPEG2 TS containment for MPEG4 AVC. I am not sure above MPEG1/4 and VC9 transport in MPEG2 TS. Regards, Mihir Mody, Multimedia codecs group, Texas Instruments India, Ltd, Email : mihir@ti.com Phone : +91-80-25099307 -----Original Message----- From: mp4-tech-bounces@lists.mpegif.org [mailto:mp4-tech-bounces@lists.mpegif.org]On Behalf Of Ilan Daniel Sent: Sunday, September 19, 2023 1:21 PM To: mp4-tech@lists.mpegif.org Subject: [Mp4-tech] [system] MPEG4-AVC inside MPEG2 TS ? Hi, can MPEG2 TS contain MPEG4-AVC ? and what about other "MPEG" video ? MPEG1 video ? MPEG4 video ? and what about "non MPEG" video like the VC-9 ? Ilan Daniel Adimos Atirey Yeda 17 Kfar Saba Israel ilan.daniel@adimos.com tel: +972-9-7630003 mobile: +972-544-508695 -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040920/bf95ca79/attachment.html From mihir ti.com Mon Sep 20 20:57:26 2004 From: mihir ti.com (Mody, Mihir) Date: Tue Sep 21 09:18:37 2004 Subject: [Mp4-tech] AMR payload&Storage format Message-ID: <0908EAA859AF3641B7D9BEDAB8DD6A742F7A6F@dbde2k01.itg.ti.com> Hi Mehdi, Are you refering to storage format as per RFC 3267 or 3GPP file format based on MPEG4 File format? Regards, Mihir Mody, Multimedia codecs group, Texas Instruments India, Ltd, Email : mihir@ti.com Phone : +91-80-25099307 -----Original Message----- From: mp4-tech-bounces@lists.mpegif.org [mailto:mp4-tech-bounces@lists.mpegif.org]On Behalf Of Mehdi Sharifi Sent: Monday, September 20, 2023 7:07 PM To: mp4-tech@lists.mpegif.org Subject: [Mp4-tech] AMR payload&Storage format Hi dear all, format of AMR in storage is abit different from it's format in payload or streaming . is there any source code that I can use to convert payload format to storage format ? thanx --mehdi _____ Do you Yahoo!? New and Improved Yahoo! Mail - 100MB free storage! -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040920/44f5174e/attachment.html From gedrozia yahoo.com Mon Sep 20 09:05:13 2004 From: gedrozia yahoo.com (Mehdi Sharifi) Date: Tue Sep 21 09:21:09 2004 Subject: [Mp4-tech] AMR payload&Storage format In-Reply-To: <0908EAA859AF3641B7D9BEDAB8DD6A742F7A6F@dbde2k01.itg.ti.com> Message-ID: <20040920150513.10929.qmail@web41602.mail.yahoo.com> Hi , thanks for replying , in 3GPP file format it is said that format of AMR samples is according to RFC 3267 ; I read RFC 3267 ; it was alittle complicated ; I am looking for a source or some contribution to convert this payload format to ordinary AMR format in order to play it with QuickTime or another player if you can help me , it's very appriciated thank you alot --mehdi "Mody, Mihir" wrote: Hi Mehdi, Are you refering to storage format as per RFC 3267 or 3GPP file format based on MPEG4 File format? Regards, Mihir Mody, Multimedia codecs group, Texas Instruments India, Ltd, Email : mihir@ti.com Phone : +91-80-25099307 -----Original Message----- From: mp4-tech-bounces@lists.mpegif.org [mailto:mp4-tech-bounces@lists.mpegif.org]On Behalf Of Mehdi Sharifi Sent: Monday, September 20, 2023 7:07 PM To: mp4-tech@lists.mpegif.org Subject: [Mp4-tech] AMR payload&Storage format Hi dear all, format of AMR in storage is abit different from it's format in payload or streaming . is there any source code that I can use to convert payload format to storage format ? thanx --mehdi --------------------------------- Do you Yahoo!? New and Improved Yahoo! Mail - 100MB free storage! --------------------------------- Do you Yahoo!? Yahoo! Mail - 50x more storage than other providers! -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040920/12dbe4d3/attachment.html From sameer_manuja yahoo.com Mon Sep 20 10:58:27 2004 From: sameer_manuja yahoo.com (Sameer Manuja) Date: Tue Sep 21 09:23:11 2004 Subject: [Mp4-tech] doubt regarding modulo_time_base and vop_time_increment Message-ID: <20040920165827.53073.qmail@web50202.mail.yahoo.com> Hi, I'm confused with the explanation of modulo_time_base and vop_time_increment parameters of the vop header in the standard. Suppose i want to encode at vop rate of 5, and i'm using vop_time_increment_resolution of 50 ticks/s, then how will the modulo_time_base and vop_time_increment fields be coded? Will it be like, 0 0 0 0 0 0 0 0 0 0 0 ... (modulo_time_base) 0 10 10 10 10 10 10 10 10 10 10 ... (vop_time_increment) or, 0 0 0 0 0 1 0 0 0 0 1 ... (modulo_time_base) 0 10 20 30 40 0 10 20 30 40 0 ... (vop_time_increment) Regards, Sameer _______________________________ Do you Yahoo!? Declare Yourself - Register online to vote today! http://vote.yahoo.com From ghughes broadbus.com Mon Sep 20 15:48:14 2004 From: ghughes broadbus.com (Gary Hughes) Date: Tue Sep 21 09:24:32 2004 Subject: [Mp4-tech] [system] MPEG4-AVC inside MPEG2 TS ? Message-ID: <3B83C5E7EAB53F44A16CDFB70F9E4BF30124831A@btiexch01.broadbus.com> Transport of MPEG-1 in TS was defined in the original version of 13818-1. Support for carrying MPEG-4 streams in TS was added in an ammedment (#7, I think). Streams can be either Sync Layer-packetised elementary streams or FlexMux streams. Both can be encapsulated as PES or as private sections. In the 2000 edition of 13818-1, section 2.11 describes this in detail. Proposed mappings for VC9 into TS (now called VC1, to avoid confusion) have been published by ATSC as part of their ATSC-E proposals. That can be found on their website. I have seen references to, but have not seen, a similar document from SMPTE to accompany the formal VC1 spec when it is released. Gary Hughes Director of Media Engineering Broadbus Technologies, Inc. ghughes@broadbus.com v: 978 264 7919 f: 978 264 9108 -------------------------------------------------------- This email message and any files transmitted with it contain confidential information intended only for the person(s) to whom this email message is addressed. If you have received this email message in error, please notify the sender immediately by telephone or email and destroy the original message without making a copy. Thank you. -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040920/d9ddd249/attachment.html From yhuang vichipcorp.com Mon Sep 20 15:13:02 2004 From: yhuang vichipcorp.com (Yusong Huang) Date: Tue Sep 21 09:25:37 2004 Subject: [Mp4-tech] How to use top_field_first Message-ID: <414F47DE.4090000@vichipcorp.com> Dear Experts, I have some questions about MPEG-4 interlace tool and need your help. (1) According to MPEG-4 spec, when top_field_first is set to "0", the bottom field of the reconstructed VOP is the first field to be displayed. Is this reconstructed bottom field also the bottom field of TV scan? (2) In MPEG-2, top_field_first and repeat_first_field are used together to achieve 3:2 pull-down. In MPEG-4, there is no repeat_first_field, so in what situation and how to use top_field_first? Thanks a lot. Yusong From vinaymk emuzed.com Tue Sep 21 19:05:11 2004 From: vinaymk emuzed.com (Vinay M K) Date: Tue Sep 21 09:26:31 2004 Subject: [Mp4-tech] Enhanced HE-AAC In-Reply-To: <20040914144143.20690.qmail@webmail28.rediffmail.com> Message-ID: <001901c49fd7$70694a30$c70aa8c0@blr.emuzed.com> Dear experts, Can some one send me some sample test streams for testing SBR and PS tools together. (preferrably in any of the ADTS/Mp4/ADIF file formats) Are there any test/conformance streams planned by Mpeg body? If yes by when can they be expected and where? Thanks in advance. Vinay -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040921/c4c3f568/attachment.html From singer apple.com Tue Sep 21 07:29:07 2004 From: singer apple.com (Dave Singer) Date: Wed Sep 22 09:55:30 2004 Subject: [Mp4-tech] AMR payload&Storage format In-Reply-To: <20040920150513.10929.qmail@web41602.mail.yahoo.com> References: <20040920150513.10929.qmail@web41602.mail.yahoo.com> Message-ID: At 8:05 AM -0700 9/20/04, Mehdi Sharifi wrote: >Hi , >thanks for replying , > in 3GPP file format it is said that format of AMR samples is >according to RFC 3267 ; I read RFC 3267 ; it was alittle complicated >; I am looking for a source or some contribution to convert this >payload format to ordinary AMR format in order to play it with >QuickTime or another player > >if you can help me , it's very appriciated > >thank you alot >--mehdi Well converting an RTP stream to a file format is a moderate amount of work. In a 3GPP file, each media track is constructed as a sequence of timed samples. The duration of AMR frames is constant (20ms as I recall). The media data (as represented by the sample sizes etc.) is stored as 'samples' (frames). Each sample consists of a set of AMR frames (as indicated by the frames-per-sample value), contiguously stored, in the 'storage format' , however, there is no magic number stored within the samples; that is, each sample is just a contiguous set of AMR frames. > >"Mody, Mihir" wrote: > >Hi Mehdi, > >Are you refering to storage format as per RFC 3267 or 3GPP file >format based on MPEG4 File format? > >Regards, >Mihir Mody, >Multimedia codecs group, >Texas Instruments India, Ltd, >Email : mihir@ti.com >Phone : +91-80-25099307 > >-----Original Message----- >From: mp4-tech-bounces@lists.mpegif.org >[mailto:mp4-tech-bounces@lists.mpegif.org]On Behalf Of Mehdi Sharifi >Sent: Monday, September 20, 2023 7:07 PM >To: mp4-tech@lists.mpegif.org >Subject: [Mp4-tech] AMR payload&Storage format > > Hi dear all, > format of AMR in storage is abit different from it's format in >payload or streaming . is there any source code that I can use to >convert payload format to storage format ? > >thanx > --mehdi > > > >Do you Yahoo!? >New >and Improved Yahoo! Mail - 100MB free storage! > > > >Do you Yahoo!? >Yahoo! >Mail - 50x more storage than other providers! > >_______________________________________________ >NOTE: Please use clear subject lines for your posts. Include [audio, >[video], [systems], [general] or another apppropriate identifier to >indicate the type of question you have. > >Note: Conduct on the mailing list is subject to the Antitrust >guidelines found at >http://www.mpegif.org/public/documents/vault/mp-out-30042-Antitrust.php -- David Singer Apple Computer/QuickTime -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20040921/3c6437b4/attachment.html From tma iis.fhg.de Tue Sep 21 21:59:14 2004 From: tma iis.fhg.de (Herbert Thoma) Date: Wed Sep 22 09:58:05 2004 Subject: [Mp4-tech] doubt regarding modulo_time_base and vop_time_increment In-Reply-To: <20040920165827.53073.qmail@web50202.mail.yahoo.com> References: <20040920165827.53073.qmail@web50202.mail.yahoo.com> Message-ID: <41507A02.7050300@iis.fhg.de> Sameer Manuja schrieb: > Hi, > > I'm confused with the explanation of modulo_time_base > and vop_time_increment parameters of the vop header in > the standard. Suppose i want to encode at vop rate of > 5, and i'm using vop_time_increment_resolution of 50 > ticks/s, then how will the modulo_time_base and > vop_time_increment fields be coded? Yes it is somewhat confusing ... It will look like this: > 0 0 0 0 0 1 0 0 0 0 1 ... (modulo_time_base) > 0 10 20 30 40 0 10 20 30 40 0 ... > (vop_time_increment) Herbert. > Regards, > Sameer > > > > _______________________________ > Do you Yahoo!? > Declare Yourself - Register online to vote today! > http://vote.yahoo.com > _______________________________________________ > NOTE: Please use clear subject lines for your posts. Include [audio, [video], [systems], [general] or another apppropriate identifier to indicate the type of question you have. > > Note: Conduct on the mailing list is subject to the Antitrust guidelines found at http://www.mpegif.org/public/documents/vault/mp-out-30042-Antitrust.php > -- Herbert Thoma Group Manager Video Multimedia Realtime Systems Department Fraunhofer IIS Am Wolfsmantel 33, 91058 Erlangen, Germany Phone: +49-9131-776-323 Fax: +49-9131-776-399 email: tma@iis.fhg.de www: http://www.iis.fhg.de/ From lamachado inf.ufrgs.br Tue Sep 21 17:25:02 2004 From: lamachado inf.ufrgs.br (Leo) Date: Wed Sep 22 09:59:24 2004 Subject: [Mp4-tech] creating a video with BIFS In-Reply-To: <001901c49fd7$70694a30$c70aa8c0@blr.emuzed.com> References: <001901c49fd7$70694a30$c70aa8c0@blr.emuzed.com> Message-ID: <1095794702.4150800e3692f@webmail.inf.ufrgs.br> Hi... I'd like to know where can I find something (like a Developers enviroment, or a compiler) that helps me create some simple synthetic mpeg4 video (using BIFS). Can you help me? thanks in advance Leo ---------------------------------------------------------------- This message was sent using IMP, the Internet Messaging Program. From menewman ozemail.com.au Wed Sep 22 12:57:29 2004 From: menewman ozemail.com.au (M & E Newman) Date: Wed Sep 22 10:00:46 2004 Subject: [Mp4-tech] MPEG-4 In Web Page Message-ID: <4150DC09.7070107@ozemail.com.au> > Thank you for taking time to read this email. > I am trying to include a MPEG-4 file in a web page that can be viewed > not only by Netscape on a Mac but also on Explorer on a PC. > I am trying to find the relevant information that needs to be included > in the