From ranzhao arcsoft.com.cn Tue Jan 4 10:35:39 2005 From: ranzhao arcsoft.com.cn (Zhao Ran) Date: Tue Jan 4 06:53:18 2005 Subject: [Mp4-tech] Re:H.264: Intra prediction of 4*4 block Message-ID: <002301c4f206$1482f9b0$6b7410ac@arcsoft.com.cn> Hi, angle For intra_4x4 pred, all 16 blocks are processed in invers scan order as specified in subclause 6.4.3. For those blocks whose locations (ioff,joff) are (4,4),(4,12),(12,4),(12,12), the up-right neighbour block has not been reconstructed yet, so it can not be used to predict current block. 0 1 4 5 2 3 6 7 8 9 12 13 10 11 14 15 Best Regards, Zhao Ran -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20050104/2ad8cb6a/attachment.html From AngelZhang innosis.com.cn Tue Jan 4 12:36:11 2005 From: AngelZhang innosis.com.cn (AngelZhang@innosis.com.cn) Date: Tue Jan 4 06:53:22 2005 Subject: [Mp4-tech] Re:H.264: Intra prediction of 4*4 block Message-ID: hi,Zhao Ran Thanks for your help, and I understand the principle of intra prediction now. by the way, we can infer that the intra prediction is made on the basis of 8*8 block. Intra prediction of the last 4*4 block in one 8*8 block according to inverse scan can't use the 4*4 block of next 8*8 neightbour block which hasn't been reconstructed. is it right? BR angel From ranzhao arcsoft.com.cn Tue Jan 4 14:39:55 2005 From: ranzhao arcsoft.com.cn (Zhao Ran) Date: Tue Jan 4 06:53:27 2005 Subject: [Mp4-tech] Re: Re:H.264: Intra prediction of 4*4 block References: Message-ID: <004501c4f228$33a37320$6b7410ac@arcsoft.com.cn> Yes, I think so. You can refer to subclause 8.3.1. ----- Original Message ----- From: To: "Zhao Ran" Cc: Sent: Tuesday, January 04, 2024 12:36 PM Subject: Re:H.264: Intra prediction of 4*4 block > > hi,Zhao Ran > Thanks for your help, and I understand the principle of intra prediction > now. by the way, > we can infer that the intra prediction is made on the basis of 8*8 block. > Intra prediction of the last 4*4 block > in one 8*8 block according to inverse scan can't use the 4*4 block of next > 8*8 neightbour block which hasn't been > reconstructed. is it right? > > BR angel > > From stonna apple.com Tue Jan 4 07:48:41 2005 From: stonna apple.com (Stephen Tonna) Date: Tue Jan 4 11:19:03 2005 Subject: [Mp4-tech] France choose MPEG4 video, is it H.264 ? Message-ID: <1B89976A-5E68-11D9-B938-000A95AF0360@apple.com> Gary, Is there a link to a news article that says they officially chose part 10? Everything that I have found to date has only stated MPEG-4. Thanks in advance. Stephen Tonna From shreya_pathak rediffmail.com Tue Jan 4 16:05:36 2005 From: shreya_pathak rediffmail.com (Shreya Pathak) Date: Tue Jan 4 14:36:36 2005 Subject: [Mp4-tech] subbands in Mpeg4 AAC Message-ID: <20050104160702.18710.qmail@webmail17.rediffmail.com> ? Hi, 1)I wanted to how many subbands are there in Mpeg4 AAC. 2) Are the subbands and scale factor bands same ? 3) Can Joint stereo coding, PNS and TNS be applied to all subbands or only some parts of subbands. Please reply immediately. Thanks and Regards Shreya On Thu, 30 Dec 2023 pavan kumar nittala wrote : >Hi alll .... >Is the deblocking filter present in an I-Slice ?? >pavan >_______________________________________________ >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/20050104/21ca1915/attachment.html From garysull windows.microsoft.com Tue Jan 4 08:42:18 2005 From: garysull windows.microsoft.com (Gary Sullivan) Date: Tue Jan 4 14:36:40 2005 Subject: [Mp4-tech] France choose MPEG4 video, is it H.264 ? Message-ID: <91D7F2CEE3425A4A9D11311D09FCE24608D062F9@WIN-MSG-10.wingroup.windeploy.ntdev.microsoft.com> I'm not aware of any such article. Best Regards, Gary Sullivan ________________________________ From: mp4-tech-bounces@lists.mpegif.org on behalf of Stephen Tonna Sent: Tue 1/4/2024 7:48 AM To: mp4-tech@lists.mpegif.org Subject: [Mp4-tech] France choose MPEG4 video, is it H.264 ? Gary, Is there a link to a news article that says they officially chose part 10? Everything that I have found to date has only stated MPEG-4. Thanks in advance. Stephen Tonna _______________________________________________ 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/20050104/8391cf54/attachment.html From oamato wanadoo.fr Tue Jan 4 19:21:45 2005 From: oamato wanadoo.fr (Olivier Amato) Date: Tue Jan 4 14:36:45 2005 Subject: VRe: [Mp4-tech] France choose MPEG4 video, is it H.264 ? References: <1B89976A-5E68-11D9-B938-000A95AF0360@apple.com> Message-ID: <002001c4f28a$42bfef20$0a00000a@tototxoxqlsjoa> Stephen, > Is there a link to a news article that says they officially chose part 10? > Everything that I have found to date has only stated MPEG-4. You're right, the official press release from the french prime minister doesn't specify part 10 at all ( sorry, it's in french ... ) : http://www.ddm.gouv.fr/television/dossiers_thematiques/tnt15.html But this decision is based on two previous technical reports which specified MPEG-4 Part 10 as the preferred video codec : http://www.industrie.gouv.fr/biblioth/docu/dossiers/ntic/pdf/tvnumeriquevf.pdf http://www.premier-ministre.gouv.fr/IMG/pdf/rapport_boudet-2.pdf Hope this helps, Olivier Amato Media technologies consultant, France. From garysull windows.microsoft.com Tue Jan 4 14:17:31 2005 From: garysull windows.microsoft.com (Gary Sullivan) Date: Tue Jan 4 20:05:18 2005 Subject: [Mp4-tech] France choose MPEG4 video, is it H.264 ? Message-ID: <91D7F2CEE3425A4A9D11311D09FCE2460C774F4E@WIN-MSG-10.wingroup.windeploy.ntdev.microsoft.com> Olivier et al, Thanks very much for those links. If I am properly reading the prime minister's sentence "Ces modifications pr?voiront que la norme de compression MPEG-4 sera rendue obligatoire pour la diffusion des cha?nes payantes de la TNT et des cha?nes en haute d?finition.", he appears to be saying not only that the pay TV channels will use AVC, but that the HDTV channels will too. Is that correct? Best Regards, Gary Sullivan +> -----Original Message----- +> From: mp4-tech-bounces@lists.mpegif.org +> [mailto:mp4-tech-bounces@lists.mpegif.org] On Behalf Of Olivier Amato +> Sent: Tuesday, January 04, 2024 10:22 AM +> To: mp4-tech@lists.mpegif.org; Stephen Tonna +> Subject: VRe: [Mp4-tech] France choose MPEG4 video, is it H.264 ? +> +> Stephen, +> +> > Is there a link to a news article that says they +> officially chose part 10? +> > Everything that I have found to date has only stated MPEG-4. +> +> You're right, the official press release from the french +> prime minister +> doesn't specify part 10 at all ( sorry, it's in french ... ) : +> http://www.ddm.gouv.fr/television/dossiers_thematiques/tnt15.html +> +> But this decision is based on two previous technical reports +> which specified +> MPEG-4 Part 10 as the preferred video codec : +> http://www.industrie.gouv.fr/biblioth/docu/dossiers/ntic/pdf/ +> tvnumeriquevf.pdf +> http://www.premier-ministre.gouv.fr/IMG/pdf/rapport_boudet-2.pdf +> +> Hope this helps, +> +> Olivier Amato +> Media technologies consultant, France. +> +> +> +> _______________________________________________ +> 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 sandeephr tataelxsi.co.in Wed Jan 5 09:47:19 2005 From: sandeephr tataelxsi.co.in (Sandeep H R) Date: Wed Jan 5 03:06:14 2005 Subject: [Mp4-tech] Tool to convert ADTS to RAW, ADIF to RAW [AUDIO] Message-ID: <009401c4f2dd$732427a0$2514010a@telxsi.com> Hi, pls do help me in finding the tool for " Conversion of .wav file from ADTS to RAW or from ADIF to RAW format". Its related to AAC LC profile. Its urgent. Rgds Sandeep H.R From nittalapavan rediffmail.com Wed Jan 5 07:05:15 2005 From: nittalapavan rediffmail.com (pavan kumar nittala) Date: Wed Jan 5 03:08:47 2005 Subject: [Mp4-tech] Picture order cnt Lsb Message-ID: <20050105070636.2347.qmail@webmail27.rediffmail.com> ? hi experts ... Can any bosy tell me how to set the Flag pic_order_cnt_lsb ..??? On Tue, 04 Jan 2024 Shreya Pathak wrote : > >Hi, > 1)I wanted to how many subbands are there in Mpeg4 AAC. > 2) Are the subbands and scale factor bands same ? > 3) Can Joint stereo coding, PNS and TNS be applied to all subbands or only some parts of subbands. >Please reply immediately. >Thanks and Regards >Shreya > > >On Thu, 30 Dec 2023 pavan kumar nittala wrote : > >Hi alll .... > >Is the deblocking filter present in an I-Slice ?? > >pavan > >_______________________________________________ > >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 >_______________________________________________ >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/20050105/ee953a0d/attachment.html From asadi dml.aictc.com Wed Jan 5 03:53:44 2005 From: asadi dml.aictc.com (asadi@dml.aictc.com) Date: Wed Jan 5 05:22:46 2005 Subject: [Mp4-tech] bream and parrot test sequences Message-ID: <1104915224.41dbab18a2370@mail.portnet.net> Dear experts Would you help me please to find sequences "bream.cif/qcif" and "parrot.cif/qcif"? Best Regards Majid ---------------------------------------------------------------- This message was sent using IMP, the Internet Messaging Program. From guillaume_etorre realmagic.fr Wed Jan 5 10:44:14 2005 From: guillaume_etorre realmagic.fr (Guillaume Etorre) Date: Wed Jan 5 05:24:53 2005 Subject: [Mp4-tech] France choose MPEG4 video, is it H.264 ? In-Reply-To: <91D7F2CEE3425A4A9D11311D09FCE2460C774F4E@WIN-MSG-10.wingroup.windeploy.ntdev.microsoft.com> References: <91D7F2CEE3425A4A9D11311D09FCE2460C774F4E@WIN-MSG-10.wingroup.windeploy.ntdev.microsoft.com> Message-ID: <41DBB6EE.2000408@realmagic.fr> Hi Gary, This has been a hot political issue in France for quite a while now. Terrestrial television has been delayed on and on for years now, and government was eager to get something starting in March 2005, as planned. Hence the decision to use MPEG-2 for free-to-air channels. All the rest is MPEG-4 (which has come to mean H.264.) Best regards, -- Guillaume Etorre REALmagic France Sigma Designs, Inc. Gary Sullivan wrote: >Olivier et al, > >Thanks very much for those links. If I am properly reading the prime minister's sentence "Ces modifications pr?voiront que la norme de compression MPEG-4 sera rendue obligatoire pour la diffusion des cha?nes payantes de la TNT et des cha?nes en haute d?finition.", he appears to be saying not only that the pay TV channels will use AVC, but that the HDTV channels will too. > >Is that correct? > >Best Regards, > >Gary Sullivan > > >+> -----Original Message----- >+> From: mp4-tech-bounces@lists.mpegif.org >+> [mailto:mp4-tech-bounces@lists.mpegif.org] On Behalf Of Olivier Amato >+> Sent: Tuesday, January 04, 2024 10:22 AM >+> To: mp4-tech@lists.mpegif.org; Stephen Tonna >+> Subject: VRe: [Mp4-tech] France choose MPEG4 video, is it H.264 ? >+> >+> Stephen, >+> >+> > Is there a link to a news article that says they >+> officially chose part 10? >+> > Everything that I have found to date has only stated MPEG-4. >+> >+> You're right, the official press release from the french >+> prime minister >+> doesn't specify part 10 at all ( sorry, it's in french ... ) : >+> http://www.ddm.gouv.fr/television/dossiers_thematiques/tnt15.html >+> >+> But this decision is based on two previous technical reports >+> which specified >+> MPEG-4 Part 10 as the preferred video codec : >+> http://www.industrie.gouv.fr/biblioth/docu/dossiers/ntic/pdf/ >+> tvnumeriquevf.pdf >+> http://www.premier-ministre.gouv.fr/IMG/pdf/rapport_boudet-2.pdf >+> >+> Hope this helps, >+> >+> Olivier Amato >+> Media technologies consultant, France. >+> >+> >+> >+> _______________________________________________ >+> 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 >+> > >_______________________________________________ >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 > > From dsn2603 rediffmail.com Wed Jan 5 14:36:41 2005 From: dsn2603 rediffmail.com (sakthi narayanan) Date: Wed Jan 5 12:13:08 2005 Subject: [Mp4-tech] Tool to convert ADTS to RAW, ADIF to RAW [AUDIO] Message-ID: <20050105143806.24653.qmail@webmail46.rediffmail.com> Hi, you can write the code for conversion of ADTS to raw & ADIF to raw format. 1.ADIF to RAW Format Delete the headers in the .aac file.Then it becomes as raw format. ADIF .aac file will contain one header and followed by raw data only. 2.ADTS to RAW Format Delete the headers in the .aac file.In ADTS .aac file,it contains headers for every frame.In ADTS header,it conatins sample length based on that u can move the file pointer to that position and extract data and remove the following headers for every frame.remove the headers for each frame and it becomes a raw .aac file. For more information, u can also logon to audiocoding.com With regards, Sakthi On Wed, 05 Jan 2024 Sandeep H R wrote : > Hi, > pls do help me in finding the tool for " Conversion of .wav file from ADTS >to RAW or from ADIF to RAW format". Its related to AAC LC profile. Its >urgent. > Rgds > Sandeep H.R > >_______________________________________________ >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/20050105/daaaa06d/attachment-0001.html From AngelZhang innosis.com.cn Thu Jan 6 09:15:48 2005 From: AngelZhang innosis.com.cn (AngelZhang@innosis.com.cn) Date: Wed Jan 5 23:30:13 2005 Subject: [Mp4-tech] H.264: about Boundary Strength in Deblocking Filter Message-ID: hi,experts In the H.264 standard,value of boundary strength is calculate according to judgement of different macroblocks, such as mb_type and the prediction mode etc. but I am confused why value of boundary strengh of IntraMb (here 4 or 3) are larger than that of InterMb(2,1,or0). is it mean that the filter strength of IntraMb is stronger than InterMb? why? and another question is that whether deblock filter is only used for P frame and I frame don't need deblock filter. thanks in advance. best regards angel From oamato wanadoo.fr Thu Jan 6 12:21:19 2005 From: oamato wanadoo.fr (Olivier Amato) Date: Fri Jan 7 00:00:21 2005 Subject: [Mp4-tech] MPEG-4 watermarking solutions ? References: <1B89976A-5E68-11D9-B938-000A95AF0360@apple.com> <002001c4f28a$42bfef20$0a00000a@tototxoxqlsjoa> Message-ID: <003301c4f3e1$da0f3f40$0a00000a@tototxoxqlsjoa> I'm looking for good MPEG-4 audio and video watermarking solutions with Linux SDKs. Any recommendations ? Thanks in advance. Olivier From garysull windows.microsoft.com Thu Jan 6 18:43:09 2005 From: garysull windows.microsoft.com (Gary Sullivan) Date: Fri Jan 7 00:02:43 2005 Subject: [Mp4-tech][Video][H.264]Question about MB skip in MBAFF Message-ID: <91D7F2CEE3425A4A9D11311D09FCE2460C84CD3E@WIN-MSG-10.wingroup.windeploy.ntdev.microsoft.com> Zhao et al, Without spending a lot of time looking at it, I recall that there are some cases where the processes described in the standard seem to operate on smaller blocks, but if you trace through all the logic, the results of multiple small blocks turns out to ordinarily act as if using a larger block. And there is some reason we specified it that way, although I can't say what they were off the top of my head. I think there is no new error in the text of the standard being reported here, but I would feel more comfortable if someone very familiar with this topic (e.g., Alexis or Barry or Lowell) could confirm. One thing I suggest is making sure you're looking at the latest drafted corrigendum-ized version of the standard (JVT-M049d3 applied to JVT-L050d5 or JVT-M050d1). Best Regards, Gary Sullivan ________________________________ From: mp4-tech-bounces@lists.mpegif.org [mailto:mp4-tech-bounces@lists.mpegif.org] On Behalf Of Zhao Ran Sent: Sunday, December 12, 2023 11:59 PM To: Gary Sullivan; Alexis Michael Tourapis; Isabelle Perroux; mp4-tech@lists.mpegif.org Cc: yxie_2000@yahoo.com.cn Subject: Re: [Mp4-tech][Video][H.264]Question about MB skip in MBAFF It is not a bug report. We are just developing a H.264 Codec and use JM decoder for compliance verification. I see Alexis' comment completely and appreciate your help. By the way, I has another confusion about Direct mode. In Table 7-11 and Table 7-15 of subclause 7.4.5, MbPartWidth and MbPartHeight are used in the derivation process for mv and reference frame indices in 8.4.1 for direct mode prediction. They are 8 and 8 for B_Direct_16x16 and B_Skip, or 4 and 4 for B_Direct_8x8. While according to 6.4.7.5, - If mb_type is equal to P_Skip or B_Skip, or mb_type is equal to B_8x8 and sub_mb_type[ mbPartIdx ] is equal to B_Direct_8x8, predPartWidth = 16. NOTE - When sub_mb_type[ mbPartIdx ] is equal to B_Direct_8x8, the predicted motion vector is the predicted motion vector for the complete macroblock independent of the value of mbPartIdx. Well, then why there are 8 and 4 in Table 7-12 and 7-15 instead of 16. Is there any inferred effect of 8 and 4. ----- Original Message ----- From: Gary Sullivan To: Alexis Michael Tourapis ; Zhao Ran ; Isabelle Perroux ; mp4-tech@lists.mpegif.org Sent: Monday, December 13, 2023 10:25 AM Subject: RE: [Mp4-tech][Video][H.264]Question about MB skip in MBAFF Perhaps is Zhao Ran trying to report that our reference software encoder has a bug in this area (using a different mode than the decoder reference software)? -G. ________________________________ From: mp4-tech-bounces@lists.mpegif.org on behalf of Alexis Michael Tourapis Sent: Sun 12/12/2023 2:49 PM To: 'Zhao Ran'; 'Isabelle Perroux'; mp4-tech@lists.mpegif.org Subject: RE: [Mp4-tech][Video][H.264]Question about MB skip in MBAFF Dear Zhao, The use of skip macroblocks is basically an encoder's decision. Noone forces you to use them and you can even have an encoder that uses lets say only 16x16 inter macroblocks only. Obviously in the case you are describing skip frame MB pair is not allowed and your encoder should not even examine that particular case within your mode decision. In general it is the encoder's job to ensure that such illegal cases never happen. However you may choose to still code this pair as a frame pair and "emulate" one of the skipped macroblocks using the 16x16 inter mode, with mv parameters equal to that of skip, and cbp=0. Best regards Alexis ________________________________ From: mp4-tech-bounces@lists.mpegif.org [mailto:mp4-tech-bounces@lists.mpegif.org] On Behalf Of Zhao Ran Sent: Sunday, December 12, 2023 4:12 AM To: Isabelle Perroux; mp4-tech@lists.mpegif.org Subject: Re: [Mp4-tech][Video][H.264]Question about MB skip in MBAFF Thanks for your information. The problem I confronted with is that the skipped macroblock pair is frame MB, while the neighbouring macroblock pair immediately to the left of the skipped macroblock pair is field MB. According to 7.4.4, the mb_field_decoding_flag shall be inferred to be 1, and decoder whould reconstruct the skipped macroblock pair as field macroblock pair. Thus, the output of decoder will be different to the reconstruction result of encoder. ----- Original Message ----- From: Isabelle Perroux To: 'Zhao Ran' ; mp4-tech@lists.mpegif.org Sent: Friday, December 10, 2023 8:57 PM Subject: RE: [Mp4-tech][Video][H.264]Question about MB skip in MBAFF Zhao, Please refer to 7.4.4 : When mb_field_decoding_flag is not present for either macroblock of a macroblock pair, the value of mb_field_decoding_flag is derived as follows. - If there is a neighbouring macroblock pair immediately to the left of the current macroblock pair in the same slice, the value of mb_field_decoding_flag shall be inferred to be equal to the value of mb_field_decoding_flag for the neighbouring macroblock pair immediately to the left of the current macroblock pair, - Otherwise, if there is no neighbouring macroblock pair immediately to the left of the current macroblock pair in the same slice and there is a neighbouring macroblock pair immediately above the current macroblock pair in the same slice, the value of mb_field_decoding_flag shall be inferred to be equal to the value of mb_field_decoding_flag for the neighbouring macroblock pair immediately above the current macroblock pair, - Otherwise (there is no neighbouring macroblock pair either immediately to the left or immediately above the current macroblock pair in the same slice), the value of mb_field_decoding_flag shall be inferred to be equal to 0. BR Isabelle ________________________________ From: mp4-tech-bounces@lists.mpegif.org [mailto:mp4-tech-bounces@lists.mpegif.org] On Behalf Of Zhao Ran Sent: vendredi 10 d?cembre 2004 10:59 To: mp4-tech@lists.mpegif.org Subject: [Mp4-tech][Video][H.264]Question about MB skip in MBAFF Hi, all I have a confusion about macroblock skip when MBAFF is used. If a field MB pair is skipped followed with a coded frame MB pair, the mb_skip_run should be 2 and decoder should copy data from reference frame or field. My question is how decoder know the skipped 2 macroblocks are field MB or frame MB? Thanks in advance. Best Regards, Zhao Ran -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20050106/67de863b/attachment-0001.html From swetha_araga yahoo.com Fri Jan 7 07:56:26 2005 From: swetha_araga yahoo.com (swetha krishnamurthy) Date: Fri Jan 7 12:01:59 2005 Subject: [Mp4-tech] Rookie question about MPEG4 reference software Message-ID: <20050107155626.37494.qmail@web60506.mail.yahoo.com> Hello, I am a EE masters student and I am trying to use MPEG 4 Systems reference software (version 2) for my masters project. When I try to compile the Im1-2D in microsoft visual C++ 6.0( on windows XP), I am getting 6 compilation errors (actually Linking errors). I had an earlier version of the systems software (version 1). Initially I got errors in it too, but I could resolve it and could compile and use the IM1core. However I am having a hard time resolving the errors of Version 2 Im1-2D. The errors that are displayed are: Linking... Clock.obj : error LNK2001: unresolved external symbol "public: bool __thiscall MediaControlImp::IsUnitPlayable(double)" (?IsUnitPlayable@MediaControlImp@@QAE_NN@Z) DataChan.obj : error LNK2001: unresolved external symbol "public: void __thiscall MediaControlImp::Play(int)" (?Play@MediaControlImp@@QAEXH@Z) OpenStr.obj : error LNK2001: unresolved external symbol "public: void __thiscall MediaControlImp::Play(int)" (?Play@MediaControlImp@@QAEXH@Z) Executiv.obj : error LNK2001: unresolved external symbol "public: __thiscall MediaControlImp::MediaControlImp(void)" (??0MediaControlImp@@QAE@XZ) OpenStr.obj : error LNK2001: unresolved external symbol "public: void __thiscall MediaControlImp::StreamStopped(void)" (?StreamStopped@MediaControlImp@@QAEXXZ) ..\Debug\IM1-2D.exe : fatal error LNK1120: 4 unresolved externals Error executing link.exe. IM1-2D.exe - 6 error(s), 20 warning(s) Can anyone please tell me how to go about it or what should I do differently? Any project settings to be changed etc. I appreciate any guidance and help regarding the matter. Thanks Swetha --------------------------------- Do you Yahoo!? Yahoo! Mail - Easier than ever with enhanced search. Learn more. -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20050107/b2108241/attachment.html From snd codingtechnologies.com Fri Jan 7 18:22:19 2005 From: snd codingtechnologies.com (Andreas Schneider) Date: Sat Jan 8 07:30:25 2005 Subject: [Mp4-tech] MPEG-2 AAC + SBR In-Reply-To: <396e4b6e041213210178c31b8c@mail.gmail.com> Message-ID: Hello, ISO/IEC 13818-7:2003/AMD1 is the standard you will want to consult regaring SBR with MPEG-2 AAC, though signaling is probably the most important thing to mention. Conformance testing of MPEG-2 AAC with SBR happens in the same way as MPEG-4 HE AAC conformance testing, except that - obviously - everything that requires explicit signaling is disregarded. Hope that helps, Andreas mp4-tech-bounces@lists.mpegif.org wrote on 2023-12-14 06:01:17: > Hi all, > > Can you people help me in the following issue , > > I need to implement MPEG-2 AAC + SBR : > > a)I am having MPEG-2 AAC ( no SBR ). > b)I am having MPEG-4 AAC + SBR. > > What I am planning to do is, take SBR from b) and plug it in to a). > > I have mainly two issues, > > Issue 1: Signaling of SBR. > ---------------------------- > Out of the two signaling schemes ( Implicit & Explicit ), > I think implicit signaling is the one suits this scenario. > (even though it will make the final system complex). > > Do you find any problem with this choice ???? > > Do I need to consult the content providers for confirming about the > signaling ? > > Issue 2: Testing for MPEG-2 + SBR. > ----------------------------------- > How do I test this setup ? > > Do you people find any more future risks in this ???? > > Hope I have conveyed my doubt in a clear manner. > > Waiting for your response. > > Thanks in advance, > > sherin > _______________________________________________ > 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 -- Andreas Schneider, Research Engineer Coding Technologies GmbH Deutschherrnstr. 15-19 90429 Nuernberg, Germany phone: +49 (0) 911 92891 -26 fax: +49 (0) 911 92891 -99 mailto:snd@CodingTechnologies.com From snd codingtechnologies.com Fri Jan 7 18:48:26 2005 From: snd codingtechnologies.com (Andreas Schneider) Date: Sat Jan 8 07:30:30 2005 Subject: [Mp4-tech] [Audio] SBR bitstreams which require down sampling In-Reply-To: <20041216055657.64056.qmail@web20106.mail.yahoo.com> Message-ID: Dattaguru, Meanwhile there are new conformance bitstreams (well, actually the bitstreams are the same, they only have new names), where you can conclude whether downsampled SBR is signaled or not from the filename even easier. Basically your understanding is correct, except that there is one more bitstream, which signals downsampled SBR (new name: al_sbr_sig_24_2_fsaac24_sig1.mp4). You should only be aware of the fact that such a decoder is not MPEG-4 conformant, since the standard requires that downsampled SBR has to be used if this is explicitely signaled. Best regards, Andreas mp4-tech-bounces@lists.mpegif.org wrote on 2023-12-16 06:56:57: > Hi Experts, > > I want to know which among the SBR bit streams require > down-sampling? > I have sbr_sr_*.mp4 bit streams which are provided for > testing different sample rates. In case, I dont want > to support down-sampling, then which of the bit > streams are to be omitted (i.e., not to be > considered)? > To my understanding, Bit streams which require down > sampling are > sbr_sig_3.mp4 > sbr_sr_03_03.mp4, sbr_sr_04_04.mp4, sbr_sr_05_05.mp4, > sbr_sr_06_06.mp4, sbr_sr_07_07.mp4 and > sbr_sr_08_08.mp4 > Hence these bit streams are not to be tested if my > decoder doesnot support down sampling? > > Thanks in advance for your valuable support and the > answers. > Thanks and regards, > Dattaguru > > > > > > __________________________________ > Do you Yahoo!? > Take Yahoo! Mail with you! Get it on your mobile phone. > http://mobile.yahoo.com/maildemo > _______________________________________________ > 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 -- Andreas Schneider, Research Engineer Coding Technologies GmbH Deutschherrnstr. 15-19 90429 Nuernberg, Germany phone: +49 (0) 911 92891 -26 fax: +49 (0) 911 92891 -99 mailto:snd@CodingTechnologies.com From p.y.a.yip herts.ac.uk Sat Jan 8 19:22:28 2005 From: p.y.a.yip herts.ac.uk (PY Amanda Yip) Date: Sun Jan 9 07:05:46 2005 Subject: [Mp4-tech] Decoding H.264 encoded streams Message-ID: <6.1.0.6.0.20050108191426.01a6afb8@altair.herts.ac.uk> Hi, I have used the partitioning mode in the H.264 reference software JM9.0 to partition my video streams into 3 partitions. The encoded .264 streams in partition mode is then sent through a wireless channel model and de-partitioning programs before it is sent to the decoder. However the H.264 decoder failed to decode even at a good SNR with no bit errors. Does anyone know why or have encountered problems like this before ? What and where should I start looking in the .264 files to help me sort out my problem ? From sherin.tech gmail.com Sun Jan 9 20:30:59 2005 From: sherin.tech gmail.com (sherin tech) Date: Sun Jan 9 16:31:54 2005 Subject: [Mp4-tech] MPEG-2 AAC + SBR In-Reply-To: References: <396e4b6e041213210178c31b8c@mail.gmail.com> Message-ID: <396e4b6e050109070033344ccf@mail.gmail.com> Thanks a lot Andreas !! As u suggested, I searched for "ISO/IEC 13818-7:2003/Amd1" in ISO website, Website is saying, that is Withdrawn standard. As per the following link .. link: http://www.iso.ch/iso/en/CatalogueDetailPage.CatalogueDetail?CSNUMBER=38719&ICS1=35 Is this correct information ? If so, which standard do I need to refer for my scenario (MPEG-2 + SBR) ???? But I could found a standard "ISO/IEC 13818-7:2004" Link : http://www.iso.org/iso/en/CatalogueDetailPage.CatalogueDetail? CSNUMBER=40886&scopelist= Will this help ?? ------------------------------------------------------------------------------------------ As you said , signalling is the most important aspect. So, If I support *only* implicit signaling, Can I assure that, it will cover all kinds of situation ??? ------------------------------------------------------------------------------------------ One more thing I want to confirm about the MPEG-2 ADTS streams generation with your (CT's) utility adif2mp4. The change I did in the script 'convert' is added extra options for, 1. MPEG-2 2. LC ( -p LC ) 3. implicit siganalling ( -k 0 ) 4. o/p file ADTS format. As, "$ADIF2MPEG -p LC -mpeg2 -k 0 -o adts ${FILE}.mp4 ${FILE}.adts" Is this fine ? Did I miss any more options ? ------------------------------------------------------------------------------------------- Hope I have conveyed my issues clearly. Waiting for a reply Thanks & regards, sherin On Fri, 7 Jan 2024 18:22:19 +0100, Andreas Schneider wrote: > Hello, > > ISO/IEC 13818-7:2003/AMD1 is the standard you will want to consult > regaring SBR with MPEG-2 AAC, though signaling is probably the most > important thing to mention. > Conformance testing of MPEG-2 AAC with SBR happens in the same way as > MPEG-4 HE AAC conformance testing, except that - obviously - everything > that requires explicit signaling is disregarded. > > Hope that helps, > > Andreas > > mp4-tech-bounces@lists.mpegif.org wrote on 2023-12-14 06:01:17: > > > Hi all, > > > > Can you people help me in the following issue , > > > > I need to implement MPEG-2 AAC + SBR : > > > > a)I am having MPEG-2 AAC ( no SBR ). > > b)I am having MPEG-4 AAC + SBR. > > > > What I am planning to do is, take SBR from b) and plug it in to a). > > > > I have mainly two issues, > > > > Issue 1: Signaling of SBR. > > ---------------------------- > > Out of the two signaling schemes ( Implicit & Explicit ), > > I think implicit signaling is the one suits this scenario. > > (even though it will make the final system complex). > > > > Do you find any problem with this choice ???? > > > > Do I need to consult the content providers for confirming about the > > signaling ? > > > > Issue 2: Testing for MPEG-2 + SBR. > > ----------------------------------- > > How do I test this setup ? > > > > Do you people find any more future risks in this ???? > > > > Hope I have conveyed my doubt in a clear manner. > > > > Waiting for your response. > > > > Thanks in advance, > > > > sherin > > _______________________________________________ > > 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 > > -- > Andreas Schneider, Research Engineer > > Coding Technologies GmbH > Deutschherrnstr. 15-19 > 90429 Nuernberg, Germany > phone: +49 (0) 911 92891 -26 > fax: +49 (0) 911 92891 -99 > > mailto:snd@CodingTechnologies.com > > From biplob_uap yahoo.com Sun Jan 9 20:42:29 2005 From: biplob_uap yahoo.com (biplob das) Date: Mon Jan 10 05:45:31 2005 Subject: [Mp4-tech] support AMR Message-ID: <20050110044229.92663.qmail@web50409.mail.yahoo.com> Hello Sir, As far as I know 3GPP allows AMR, MPEG does not,but how it will be possible to support AMR in MP4 ? If there has any possibility,please tell me concept. Regards Biplob --------------------------------- Do you Yahoo!? Yahoo! Mail - Helps protect you from nasty viruses. -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20050109/65fe87a9/attachment.html From zh_zhouhuan hotmail.com Mon Jan 10 09:01:04 2005 From: zh_zhouhuan hotmail.com (zhou huan) Date: Mon Jan 10 17:20:50 2005 Subject: [Mp4-tech] (no subject) Message-ID: Hi, all: I have downloaded MPEG 4 reference software and successfully compiled it. But I could not set the parameter correctly for plain MPEG2 AAC encoding/decoding mode. My test audio signal is a mono signal with 16bits, and 44.1kHz sampleing rate. Following the information on README_usage, my options are: ENCODE at 64kbit/s: mp4auenc -m tf -c "-aac_raw -aac_tns" -r 64000 harp.wav -o test.aac DECODE: mp4audec -c "-aac_raw" -aaceof test.aac -o harp64.wav -s 44100 -n Encoding process looks fine. My problem is whatever I set, the decoding process doesn't work. The reported errors are: 1) for =0, 1, and 2: Error: Unanticipated channel; 2) for =3, 4, ... 10: Error: DecTfInit: audio data has more than one channel; 3) for =11,12...: Error: Decode: max bit stream frame size too long. Could anyone give me an explanation about it? Or pass me the correct command options? Your help is greatly appreciated. Regards, Jove _________________________________________________________________ Find answers fast with MSN Search BETA. http://beta.search.msn.com.sg/ New look and improved results. Give it a try! From snd codingtechnologies.com Mon Jan 10 15:20:28 2005 From: snd codingtechnologies.com (Andreas Schneider) Date: Mon Jan 10 17:23:23 2005 Subject: [Mp4-tech] MPEG-2 AAC + SBR In-Reply-To: <396e4b6e050109070033344ccf@mail.gmail.com> Message-ID: Thanks for pointing this out, Sherin. It seems my cross references are a bit outdated. ISO/IEC 13818-7:2004 is indeed the latest version of MPEG-2 AAC, which also includes SBR. The abstract for this document on the ISO web site points this out nicely: " In comparison to ISO/IEC 13818-7:2003, ISO/IEC 13818-7:2004 supplements information on how to transmit and obtain MPEG-4 SBR data as part of the MPEG-2 AAC access unit. " Regards, Andreas mp4-tech-bounces@lists.mpegif.org wrote on 2024-01-09 16:00:59: > Thanks a lot Andreas !! > > As u suggested, I searched for "ISO/IEC 13818-7:2003/Amd1" in ISO > website, Website is saying, that is Withdrawn standard. As per the > following link .. > > link: > http://www.iso.ch/iso/en/CatalogueDetailPage.CatalogueDetail? > CSNUMBER=38719&ICS1=35 > > Is this correct information ? > > If so, which standard do I need to refer for my scenario (MPEG-2 + SBR) ???? > > But I could found a standard "ISO/IEC 13818-7:2004" > > Link : > http://www.iso.org/iso/en/CatalogueDetailPage.CatalogueDetail? > CSNUMBER=40886&scopelist= > > Will this help ?? > > ------------------------------------------------------------------------------------------ > > As you said , signalling is the most important aspect. > So, If I support *only* implicit signaling, Can I assure that, it will > cover all kinds of situation ??? > > ------------------------------------------------------------------------------------------ > One more thing I want to confirm about the MPEG-2 ADTS streams > generation with your (CT's) utility adif2mp4. The change I did in the > script 'convert' is added extra options for, > 1. MPEG-2 > 2. LC ( -p LC ) > 3. implicit siganalling ( -k 0 ) > 4. o/p file ADTS format. > > As, > > "$ADIF2MPEG -p LC -mpeg2 -k 0 -o adts ${FILE}.mp4 ${FILE}.adts" > > Is this fine ? > Did I miss any more options ? > ------------------------------------------------------------------------------------------- > > Hope I have conveyed my issues clearly. > > Waiting for a reply > > Thanks & regards, > sherin > > > > > > On Fri, 7 Jan 2024 18:22:19 +0100, Andreas Schneider > wrote: > > Hello, > > > > ISO/IEC 13818-7:2003/AMD1 is the standard you will want to consult > > regaring SBR with MPEG-2 AAC, though signaling is probably the most > > important thing to mention. > > Conformance testing of MPEG-2 AAC with SBR happens in the same way as > > MPEG-4 HE AAC conformance testing, except that - obviously - everything > > that requires explicit signaling is disregarded. > > > > Hope that helps, > > > > Andreas > > > > mp4-tech-bounces@lists.mpegif.org wrote on 2023-12-14 06:01:17: > > > > > Hi all, > > > > > > Can you people help me in the following issue , > > > > > > I need to implement MPEG-2 AAC + SBR : > > > > > > a)I am having MPEG-2 AAC ( no SBR ). > > > b)I am having MPEG-4 AAC + SBR. > > > > > > What I am planning to do is, take SBR from b) and plug it in to a). > > > > > > I have mainly two issues, > > > > > > Issue 1: Signaling of SBR. > > > ---------------------------- > > > Out of the two signaling schemes ( Implicit & Explicit ), > > > I think implicit signaling is the one suits this scenario. > > > (even though it will make the final system complex). > > > > > > Do you find any problem with this choice ???? > > > > > > Do I need to consult the content providers for confirming about the > > > signaling ? > > > > > > Issue 2: Testing for MPEG-2 + SBR. > > > ----------------------------------- > > > How do I test this setup ? > > > > > > Do you people find any more future risks in this ???? > > > > > > Hope I have conveyed my doubt in a clear manner. > > > > > > Waiting for your response. > > > > > > Thanks in advance, > > > > > > sherin > > > _______________________________________________ > > > 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 > > > > -- > > Andreas Schneider, Research Engineer > > > > Coding Technologies GmbH > > Deutschherrnstr. 15-19 > > 90429 Nuernberg, Germany > > phone: +49 (0) 911 92891 -26 > > fax: +49 (0) 911 92891 -99 > > > > mailto:snd@CodingTechnologies.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 -- Andreas Schneider, Research Engineer Coding Technologies GmbH Deutschherrnstr. 15-19 90429 Nuernberg, Germany phone: +49 (0) 911 92891 -26 fax: +49 (0) 911 92891 -99 mailto:snd@CodingTechnologies.com From AngelZhang innosis.com.cn Tue Jan 11 09:38:11 2005 From: AngelZhang innosis.com.cn (AngelZhang@innosis.com.cn) Date: Tue Jan 11 03:20:27 2005 Subject: [Mp4-tech] reference of intra and inter Macroblcok! Message-ID: hi,experts who can tell me concrete reference rule of intra macroblcok and inter macroblock? questions as following: 1)Macroblocks' prediction in I frame can only take macroblock in the same slice as reference, then when one frame has two slices, then does macroblock in one slice can take the macroblock in another slice of the same frame as reference? 2)P frame can have intra macroblock and inter macroblock. as far as inter macroblock is concerned,does it only take macroblocks in other frames decoded before as reference? or other rule? and what about reference of intra macroblocks in the P frame? I am confused very much, please give me some suggestions! thanks in advance BR angel From ravimpeg4video yahoo.co.in Tue Jan 11 03:16:32 2005 From: ravimpeg4video yahoo.co.in (ravi kumar) Date: Tue Jan 11 17:51:54 2005 Subject: [Mp4-tech] AACPlus encoder at 3gpp, building problem and testvectors In-Reply-To: <200501101830.j0AIUL8A005799@lists1.magma.ca> Message-ID: <20050111031632.17562.qmail@web8308.mail.in.yahoo.com> HI all, Any will provide step by step guide lines to execute AACPlus encoder at 3gpp latest version 6.1.0 1. how to execute mono? and from where i can download test vector? 2. How to execute Stereo? and from where I can down load test vector? Regards Ravi --------------------------------- Do you Yahoo!? The all-new My Yahoo! ? What will yours do? -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20050111/d0bc4332/attachment.html From gripened gmail.com Tue Jan 11 10:27:25 2005 From: gripened gmail.com (Jayant Chauhan) Date: Tue Jan 11 17:51:58 2005 Subject: [Mp4-tech] [SYSTEM] AVI Parser Message-ID: <5b996acb05011020571f72b898@mail.gmail.com> Hey fellas Am working on a media player of my own. Have implemented it for MP4 :). Would like to extend it to support AVI files also. I am using the ISO MP4Parser (libisomedia library), the reference software provided, for parsing the mp4 file and demuxing it into audio and video components. Can anyone provide me with a link to an equivalent parser for AVI files !?! thanking you with regards Jayant From nittalapavan rediffmail.com Tue Jan 11 06:39:14 2005 From: nittalapavan rediffmail.com (pavan kumar nittala) Date: Tue Jan 11 17:52:03 2005 Subject: [Mp4-tech] reference of intra and inter Macroblcok! Message-ID: <20050111064003.8398.qmail@webmail27.rediffmail.com> Hai experts I have downloaded Jm 9.2 code. Can any bosy tell me how motion estimation is done in JM-9.2 (not the FME)..... is there any documentation available for that Thanks in advance pavan kumar -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20050111/73763fb4/attachment.html From k_kotegar yahoo.co.in Tue Jan 11 11:22:27 2005 From: k_kotegar yahoo.co.in (karunakar A.K.) Date: Tue Jan 11 17:52:08 2005 Subject: [Mp4-tech] test sequences Message-ID: <20050111112227.63453.qmail@web8401.mail.in.yahoo.com> Dear all I could not download test sequences available at http://delboy.ucd.ie/research/downloads/test_sequences Please suggest me some other source where i can get all types of test sequences. with regards kk Yahoo! India Matrimony: Find your life partneronline. -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20050111/ee6c76a2/attachment.html From shreya_pathak rediffmail.com Tue Jan 11 12:33:19 2005 From: shreya_pathak rediffmail.com (Shreya Pathak) Date: Tue Jan 11 17:52:12 2005 Subject: [Mp4-tech] subbands in Mpeg4 AAC Message-ID: <20050111093530.26473.qmail@webmail47.rediffmail.com> ? Hi, 1)I wanted to how many subbands are there in Mpeg4 AAC. 2) Are the subbands and scale factor bands same ? 3) Can Joint stereo coding, PNS and TNS be applied to all subbands or only some parts of subbands. Please reply immediately. Thanks and Regards Shreya -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20050111/375a128e/attachment.html From dennis snapmedia.com Tue Jan 11 14:19:13 2005 From: dennis snapmedia.com (Dennis Perov) Date: Tue Jan 11 19:28:39 2005 Subject: [Mp4-tech] 3gp h.263+AMR-NB hint Message-ID: <41E426B1.9020905@snapmedia.com> Hi there... I've got a dilemma: a library of 3gp files without hint tracks that now need to be streamed over Darwin. The files were created by PVAuthor that has no hint track option. I tried adding it via MPEG4IP, but as I later found out it has no support for AMR hinting yet. Apparently MP4BOX supports it, but windows crash every time I try to add a hint track... Why? I don't know, I use Windows XP with DX 9.1, I also have fedora 3 - work fine with MPEG4IP but unable to build Linux version of GPAC (it fails to build libraries properly : ( ). Well, is there a simple tool for adding hint to 3gp (PVAuthor), or should I dump this idea and re-encode the whole library using MPEG4IP? Thanks, Dennis.. -------------- next part -------------- A non-text attachment was scrubbed... Name: dennis.vcf Type: text/x-vcard Size: 196 bytes Desc: not available Url : /pipermail/mp4-tech/attachments/20050111/1658bee9/dennis.vcf From nittalapavan rediffmail.com Tue Jan 11 20:01:31 2005 From: nittalapavan rediffmail.com (pavan kumar nittala) Date: Tue Jan 11 22:02:52 2005 Subject: [Mp4-tech] AACPlus encoder at 3gpp, building problem and testvectors Message-ID: <20050111200253.17637.qmail@webmail18.rediffmail.com> Hai all can u send me a document related to the Full serach block estimation algo in H264 ?? regards pavan kumar -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20050111/808be69e/attachment.html From singer apple.com Tue Jan 11 17:40:21 2005 From: singer apple.com (Dave Singer) Date: Wed Jan 12 02:09:26 2005 Subject: [Mp4-tech] 3gp h.263+AMR-NB hint In-Reply-To: <41E426B1.9020905@snapmedia.com> References: <41E426B1.9020905@snapmedia.com> Message-ID: At 2:19 PM -0500 1/11/05, Dennis Perov wrote: >Hi there... > >I've got a dilemma: a library of 3gp files without hint tracks that >now need to be streamed over Darwin. > >The files were created by PVAuthor that has no hint track option. I >tried adding it via MPEG4IP, but as I later found out it has no >support for AMR hinting yet. Apparently MP4BOX supports it, but >windows crash every time I try to add a hint track... Why? I don't >know, I use Windows XP with DX 9.1, I also have fedora 3 - work fine >with MPEG4IP but unable to build Linux version of GPAC (it fails to >build libraries properly : ( ). >Well, is there a simple tool for adding hint to 3gp (PVAuthor), or >should I dump this idea and re-encode the whole library using >MPEG4IP? QT Pro could probably hint it...alas, that costs money. > >Thanks, > >Dennis.. > > >Attachment converted: DaveG49:dennis.vcf (TEXT/ttxt) (000207D8) >_______________________________________________ >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 ranzhao arcsoft.com.cn Wed Jan 12 10:14:47 2005 From: ranzhao arcsoft.com.cn (Zhao Ran) Date: Wed Jan 12 02:54:36 2005 Subject: [Mp4-tech] reference of intra and inter Macroblcok! References: <200501111705.j0BH102Q019587@lists1.magma.ca> Message-ID: <000f01c4f84c$7d2bec50$6b7410ac@arcsoft.com.cn> > 1)Macroblocks' prediction in I frame can only take macroblock in the same > slice as reference, then when one frame has two slices, then does > macroblock in one slice can take the macroblock in another slice of the > same frame as reference? For intra prediction, only those macroblock in the same slice are available, which make the error resilience reliable. > 2)P frame can have intra macroblock and inter macroblock. as far as inter > macroblock is concerned,does it only take macroblocks in other frames > decoded before as reference? or other rule? and what about reference of > intra macroblocks in the P frame? The first one is just as you said. For the frame have not decoded yet, it is impossible to be used for the prediction of current frame. As far as intra macroblocks, if constrained_intra_pred_flag equal to 0, any macroblocks in the same slice is allowed for prediction; else if constrained_intra_pred_flag equal to 1, only the macorblocks coded in intra prediction mode in the same slice can be used for prediction. From amalot sarnoff.com Wed Jan 12 15:37:11 2005 From: amalot sarnoff.com (Ashish Malot) Date: Wed Jan 12 18:00:37 2005 Subject: [Mp4-tech] subbands in Mpeg4 AAC References: <20050111093530.26473.qmail@webmail47.rediffmail.com> Message-ID: <41E4F6CF.85C41094@sarnoff.com> Hi, All the info is available in the standard. Anyway.... 1. No of subbands vary for Long, Short blocks and for different sampling freqs. 2. Yes. 3. Standard allows for all or chosen subbands (ur wish...). TNS is applied only to higher part of the spectrum so TNS is not ON for All the subbands. Refer standard. bye, Ashish Malot Shreya Pathak wrote: > > Hi, > 1)I wanted to how many subbands are there in Mpeg4 AAC. > 2) Are the subbands and scale factor bands same ? > 3) Can Joint stereo coding, PNS and TNS be applied to all subbands > or only some parts of subbands. > Please reply immediately. > Thanks and Regards > Shreya > > > [Image] > > ---------------------------------------------------------------- > _______________________________________________ > 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 > From akamar essex.ac.uk Wed Jan 12 14:21:00 2005 From: akamar essex.ac.uk (Kamaruddin, Azlina) Date: Wed Jan 12 18:04:19 2005 Subject: [Mp4-tech] Packets per frame & Framerate of rtpdump file in JM software h.264 Message-ID: <4DDA3092E78C1848A31BA23250BF05CB2806E4@sernt28.essex.ac.uk> Hi, I'm using the rtpdump program in the JM software. I'd like to know how I can calculate or where I can find the packets per frame and also the frame rate of the encoded video sequence. I want to use the data to produce a trace file. Thanks. azlina From biplob_uap yahoo.com Wed Jan 12 20:49:01 2005 From: biplob_uap yahoo.com (biplob das) Date: Thu Jan 13 05:17:07 2005 Subject: [Mp4-tech] mp4 and 3gp file data Message-ID: <20050113044901.80211.qmail@web50403.mail.yahoo.com> Hi, I already made a .3gp audio file from .mp4 audio file by changing File type and extention. Is it necessary to compress mp4 audio data to keep data in mdat atom of 3gp file? I compare mp4 and 3gp file data and I think it was compressed. Now I am confused about it's compression, because is it necessary or not? Please help. Regards. Biplob --------------------------------- Do you Yahoo!? Yahoo! Mail - 250MB free storage. Do more. Manage less. -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20050112/0a630d35/attachment.html From amol_chavan persistent.co.in Thu Jan 13 13:00:49 2005 From: amol_chavan persistent.co.in (Amol Chavan) Date: Thu Jan 13 19:43:49 2005 Subject: [Mp4-tech] Newbie question References: <20050113044901.80211.qmail@web50403.mail.yahoo.com> Message-ID: <00e501c4f941$cfb40b10$34322c0a@persistent.co.in> I am new to this group. I want to know what is new is MPEG-4. what the different codec for example AVC/H.264/JVT/H.26L ...Any link or document will do... Where can i find a store of mpeg-4 video and audio files ? Are there any tools to create mpeg-4 audio and videos ??? Are there any MPEG-4 filters (Direct Show filters) Thanks in advance Amol -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20050113/121227f5/attachment.html From ds_sunitha rediffmail.com Fri Jan 14 04:53:18 2005 From: ds_sunitha rediffmail.com (Sunitha DS) Date: Fri Jan 14 16:30:18 2005 Subject: [Mp4-tech] Help regarding AAC LD encoder Message-ID: <20050114045436.2206.qmail@webmail28.rediffmail.com> Hi ? Please send me the details regarding AAC Low Delay profile encoder. Is there any players or reference encoders are available for AAC LD encoder and decoder. awaiting for your response regards Sunitha -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20050114/7e96477a/attachment.html From ds_sunitha rediffmail.com Fri Jan 14 04:55:57 2005 From: ds_sunitha rediffmail.com (Sunitha DS) Date: Fri Jan 14 16:30:23 2005 Subject: [Mp4-tech] Help regarding AAC LD block switching Message-ID: <20050114045719.28926.qmail@webmail29.rediffmail.com> Hi, In case of AAC LC Encoder Block switching will decide the Windowing Sequence and based on the Windowing sequence Window type (KDB or SineWindow) will be decided. In case of AAC LD there is no block switching mechanism, instead of using KDB and Sine window in AAC LC, Overlap and Sinewindow will be used in case of AAC LD. Please let me know how the block switching is replaced in case of AAC LD encoder. regards Sunitha -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20050114/2557ec77/attachment.html From kexu ee.cuhk.edu.hk Sun Jan 16 21:51:51 2005 From: kexu ee.cuhk.edu.hk (Xu Ke) Date: Mon Jan 17 10:30:13 2005 Subject: [Mp4-tech] [Mp4][Video][H.264] Message-ID: <200501161353.j0GDrsQk015356@cuees8.ee.cuhk.edu.hk> Dear Experts, I have some questions on the motion vector prediction of inter-prediction in the H.264/AVC.Would you mind make it clear to me? The motion vector of inter-prediction should be able to address quarter-sample positions.However,since the coding of motion vectors is se(v),which is an integer number.Then,how to address quarter-sample position by the integer value? My understanding is,for example,motion vector=16 means pointing to 4 integer position while motion vector=17 means pointing to 4.25 factional position. Am I right? Many thanks in advance! Best regards, Xu Ke From jjaji2003 yahoo.com Mon Jan 17 02:24:21 2005 From: jjaji2003 yahoo.com (ahmad jalal) Date: Mon Jan 17 10:33:41 2005 Subject: [Mp4-tech] About floating point Message-ID: <20050117022421.93131.qmail@web41825.mail.yahoo.com> Hello Expert , I do not understand this paragraph about floating point and integer. " The reason for using floating point instructions instead of integer instruction is the nonpipelined, 11-cycle integer multiply operation. The floating point multiply takes only three cycles to execute and executes in a pipelined unit. " Waiting for reply Thanks Ahmad --------------------------------- Yahoo! Messenger - Communicate instantly..."Ping" your friends today! Download Messenger Now -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20050117/3309e175/attachment.html From kexu ee.cuhk.edu.hk Mon Jan 17 17:07:53 2005 From: kexu ee.cuhk.edu.hk (Xu Ke) Date: Mon Jan 17 10:35:05 2005 Subject: [Mp4-tech][Video][H.264] Message-ID: <200501170905.j0H95dQk014764@cuees8.ee.cuhk.edu.hk> Dear Experts, I have some questions on the inter/intra prediction in the H.264/AVC.Would you mind make it clear to me? 1)The motion vector of inter-prediction should be able to address quarter-sample positions.However,since the coding of motion vectors is se(v),which is an integer number.Then,how to address quarter-sample position by the integer value? My understanding is,for example,motion vector=16 means pointing to 4 integer position while motion vector=17 means pointing to 4.25 factional position. Am I right? 2)The Hadamard transform is used for the 4*4 array of luma DC coefficients in intra MBs predicted in 16*16 mode.However,if a MB is predicted by 4*4 sub-MB modes,is Hadamard still applicable? Many thanks in advance! Best regards, XU Ke From ssingh179 gmail.com Mon Jan 17 18:36:46 2005 From: ssingh179 gmail.com (Shailendra Singh) Date: Mon Jan 17 16:02:05 2005 Subject: [Mp4-tech] Clarifications regarding H.263 Message-ID: Hi, Could someone please clarify: (1) Is there an appropriate forum where one can get clarifications regarding H.263 related issues ? (2) Is there an existing conformance document for H.263 ? I found one at http://ftp3.itu.ch/av-arch/video-site/h263/h263con1.doc but it seems to be outdated and if I search on ITU's site, I can see the H.263 recommendation, and various Annexes and Appendixes, but no document which explains how to test a H.263 decoder for compliance with the recommendation, the way it is explained, for example in 14496-4. Regards, Shailendra From AngelZhang innosis.com.cn Tue Jan 18 09:44:56 2005 From: AngelZhang innosis.com.cn (AngelZhang@innosis.com.cn) Date: Tue Jan 18 08:50:21 2005 Subject: [Mp4-tech][Video][H.264] (Xu Ke) Message-ID: hi,Xu Ke I am study the part of inter prediction in these days. following if my idea about your question,wish it useful to you. and i think the first conception of yours about mv's quarter-sample accuracy is right. for in the encoder,MV's value is calculate by MC in which interpolation is used. The second question of yours confused me,too. and it seems that Hadmard transform hasn't been used in the encoder but just used in the decoding process. then the purpose of the hadmard is to reduce possible correlation between DC coeffs which has bigger value. then as far as MB with 4*4 mode,it maybe unnecessary used Hadmard because of small correlation between MB. I don't know whether my opinions are right, wish experts give further explainations. thanks a lot! best regards angel From asadi dml.aictc.com Mon Jan 17 23:23:47 2005 From: asadi dml.aictc.com (asadi@dml.aictc.com) Date: Tue Jan 18 08:50:26 2005 Subject: [Mp4-tech] About floating point In-Reply-To: <20050117022421.93131.qmail@web41825.mail.yahoo.com> References: <20050117022421.93131.qmail@web41825.mail.yahoo.com> Message-ID: <1106022227.41ec8f53b08d7@mail.portnet.net> Hi there, The paragraph indicates that: The integer multiply operation takes 11 cycles to execute, because it does not use pipeline technique. But the floating point multiply operation takes 3 cycles to execute, because it uses pipeline technique. So, the integer multiply operation is time consuming rather than floating point multiply. Regards Quoting ahmad jalal : > Hello Expert , > > I do not understand this paragraph about floating point and integer. > > " The reason for using floating point instructions instead of integer > instruction is the nonpipelined, 11-cycle integer multiply operation. The > floating point multiply takes only three cycles to execute and executes in a > pipelined unit. " > > Waiting for reply > Thanks > Ahmad > > > --------------------------------- > Yahoo! Messenger - Communicate instantly..."Ping" your friends today! > Download Messenger Now ---------------------------------------------------------------- This message was sent using IMP, the Internet Messaging Program. From ranzhao arcsoft.com.cn Tue Jan 18 09:09:11 2005 From: ranzhao arcsoft.com.cn (Zhao Ran) Date: Tue Jan 18 08:50:32 2005 Subject: [Mp4-tech][Video][H.264] Message-ID: <000f01c4fcfa$519a3260$6b7410ac@arcsoft.com.cn> 1)The motion vector of inter-prediction should be able to address quarter-sample positions.However,since the coding of motion vectors is se(v),which is an integer number.Then,how to address quarter-sample position by the integer value? My understanding is,for example,motion vector=16 means pointing to 4 integer position while motion vector=17 means pointing to 4.25 factional position. Am I right? Just as you said, the motion vector is on a scale of 1/4 pixel. 2)The Hadamard transform is used for the 4*4 array of luma DC coefficients in intra MBs predicted in 16*16 mode.However,if a MB is predicted by 4*4 sub-MB modes,is Hadamard still applicable? Hadamard transform for luma DC is only used in Intra_16x16 type. Best Regards, Zhao Ran -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20050118/62bf35d9/attachment.html From oamato wanadoo.fr Tue Jan 18 09:23:32 2005 From: oamato wanadoo.fr (Olivier Amato) Date: Tue Jan 18 08:50:37 2005 Subject: [Mp4-tech] Automatic MPEG-4 transcoding Message-ID: <001701c4fd37$01f2bb50$0a00000a@tototxoxqlsjoa> I'm looking for a solution able to automatically transcode in MPEG-4 the files uploaded to a particular folder. I would prefer an application based on open source components ( XviD, FAAC, GPAC, MPEG4IP, etc. ) in order to customize it if needed, but any commercial product or SDK would interest me. Olivier From grigory letsVision.com Tue Jan 18 19:06:20 2005 From: grigory letsVision.com (Grigory A.) Date: Tue Jan 18 16:29:45 2005 Subject: [Mp4-tech] [video mpeg4-2] MomuSys M9632 Message-ID: <961246617.20050118190620@letsVision.com> Hi! Could someone help me with it: fast VLD implementation. Looks good - 2 level tables - has to work fast and doesn't take too many space. looks on first several lines Char table_intra0[24576]= { 127,127,127,127,0,0, 127,127,127,127,0,0, 127,127,127,127,0,0, .... all tables has structure run level run level flag flush_bits or run level x x flag flush_bits or even x x x x flag flush_bits but! always last element is flush_bits and my question: - what will be happen if as entrance to table will be used index 0? Yes - right! - program fall in infinite loop in void VlcGetBlock() function in vm_get_blk.c file. So is it bug? How to manage it? second question - what happen with this URL? http://megaera.ee.nctu.edu.tw/mpeg/Optimized_Ref_Software/ it doesn't response. So could some one help me with it? -- Best wishes, ===================================== Grigory A. From shrishaprasad tataelxsi.co.in Tue Jan 18 15:57:42 2005 From: shrishaprasad tataelxsi.co.in (Shrisha Prasad R) Date: Tue Jan 18 16:31:55 2005 Subject: [Mp4-tech] Help for the MPEG TS Message-ID: <001b01c4fd48$586f7a70$4a14010a@telxsi.com> > > Hi all > I'm working on a Streaming Media Server project and I want > more details > about the MPEG TRansport stream > Software is developed in C and we assume that we will have a > stored MPEG TS > file which needs no packetization > We have to frame the RTP payload and send it across TCP/UDP > Thing is taht we are having doubts about the Precise RTP > payload data and > how to structure the code > Could anybody help us out > > Regards > Shrisha > From highfliergal2000 yahoo.com Tue Jan 18 13:53:44 2005 From: highfliergal2000 yahoo.com (sharmili arumugam) Date: Tue Jan 18 16:31:59 2005 Subject: [Mp4-tech] Mpeg4 standards Message-ID: <20050118135344.59359.qmail@web30503.mail.mud.yahoo.com> Hi! Doea anyone know about the standard frame size and also the bits/bytes per frame for mpeg4 video? I've tried searching but all the information I get is contrary. Please do reply.Thanks in advance. ________________________________________________________________________ Yahoo! Messenger - Communicate instantly..."Ping" your friends today! Download Messenger Now http://uk.messenger.yahoo.com/download/index.html From rlei ati.com Tue Jan 18 17:46:07 2005 From: rlei ati.com (Ryan Lei) Date: Wed Jan 19 10:34:54 2005 Subject: [Mp4-tech] [System][Audio] Message-ID: Hi, Experts As I understand, when mux AAC-LC into 3gp/mp4 file, the decoderSpecificInformaiton structure will follow the ISO/IEC 14496-3, which then follow ISO/IEC 14496-3 subpart 4 for AAC-LC. We found that when we use QuickTime Pro to generate 3gp/mp4 file, the size of this part is usually 2 bytes, which only contain information about audio type, channel counf and sampling rate. My question is for AAC-LC in 3gp/mp4 file format, what is the Access Unit format for coded AAC-LC data, which document it is following? Thanks Ryan Lei, Software Engineer, Video Codec Handheld Products Department | ATI Technology Inc. 1.905.882.2600x2712 | www.ati.com -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20050118/4ac97d63/attachment.html From tma iis.fhg.de Wed Jan 19 03:13:06 2005 From: tma iis.fhg.de (Herbert Thoma) Date: Wed Jan 19 10:34:58 2005 Subject: [Mp4-tech] [video]Mpeg4 standards In-Reply-To: <20050118135344.59359.qmail@web30503.mail.mud.yahoo.com> References: <20050118135344.59359.qmail@web30503.mail.mud.yahoo.com> Message-ID: <41EDC232.40202@iis.fhg.de> sharmili arumugam schrieb: > Hi! > Doea anyone know about the standard frame size and > also the bits/bytes per frame for mpeg4 video? I've > tried searching but all the information I get is > contrary. Please do reply.Thanks in advance. There is no standard frame size for MPEG-4 video. You can have any frame size from 1x1 to 8191x8191 pixel. Bits per frame depend on the frame size, frame rate and bitrate. Herbert. > ________________________________________________________________________ > Yahoo! Messenger - Communicate instantly..."Ping" > your friends today! Download Messenger Now > http://uk.messenger.yahoo.com/download/index.html > _______________________________________________ > 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 garysull windows.microsoft.com Tue Jan 18 19:09:11 2005 From: garysull windows.microsoft.com (Gary Sullivan) Date: Wed Jan 19 10:35:04 2005 Subject: [Mp4-tech] Mpeg4 standards Message-ID: <91D7F2CEE3425A4A9D11311D09FCE2460CB1F583@WIN-MSG-10.wingroup.windeploy.ntdev.microsoft.com> MPEG-4 video supports a very broad range of frame sizes. Best Regards, Gary Sullivan +> -----Original Message----- +> From: mp4-tech-bounces@lists.mpegif.org +> [mailto:mp4-tech-bounces@lists.mpegif.org] On Behalf Of +> sharmili arumugam +> Sent: Tuesday, January 18, 2024 5:54 AM +> To: mp4-tech@lists.mpegif.org +> Subject: [Mp4-tech] Mpeg4 standards +> +> Hi! +> Doea anyone know about the standard frame size and +> also the bits/bytes per frame for mpeg4 video? I've +> tried searching but all the information I get is +> contrary. Please do reply.Thanks in advance. +> +> _____________________________________________________________ +> ___________ +> Yahoo! Messenger - Communicate instantly..."Ping" +> your friends today! Download Messenger Now +> http://uk.messenger.yahoo.com/download/index.html +> _______________________________________________ +> 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 simantt motechsoftware.com Wed Jan 19 15:27:52 2005 From: simantt motechsoftware.com (simant) Date: Wed Jan 19 10:35:09 2005 Subject: [Mp4-tech] Motion Estimation in MPEG 4 Message-ID: Hi, Is there any documentaion available on the how Motion estimation is implemented in MPEG 4 reference code, esp 4 motion vector and unrestricted motion vector estimation. Thanks & Regards, Simant ------------------------------------------------------------------------------------------------------------------------------- DISCLAIMER: This message (Including any attachments) is confidential and is intended only for the addressee. All MoTech Software mails and attachments are scanned for all known viruses at the time of transmission. However, please scan the mail and attachments for viruses before opening or downloading from this transmission. We will not accept any liability for damages through virus. If you are not the intended recipient or received this message by mistake, please notify the sender by E-mail & delete the message from the system. Any unauthorized use or dissemination of the message in whole or part is strictly prohibited. -------------- next part -------------- A non-text attachment was scrubbed... Name: winmail.dat Type: application/ms-tnef Size: 1568 bytes Desc: not available Url : /pipermail/mp4-tech/attachments/20050119/062b7f24/winmail.bin From jjaji2003 yahoo.com Wed Jan 19 10:20:13 2005 From: jjaji2003 yahoo.com (ahmad jalal) Date: Wed Jan 19 13:15:32 2005 Subject: [Mp4-tech] DCT_SCALE Message-ID: <20050119102013.94718.qmail@web41809.mail.yahoo.com> Hello experts, I m interested in five dct scales(fix,overflow, descale & correctly round, division by 2 and round to integer) . These r used to control the floating point . I got the source from http://afni.nimh.nih.gov/afni/doc/source/mfwddct_8c.html So i want some information or some paper where i get the information of these scales . Thanks Ahmad --------------------------------- Yahoo! Messenger - Communicate instantly..."Ping" your friends today! Download Messenger Now -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20050119/67adc9f2/attachment.html From mihir ti.com Wed Jan 19 16:41:49 2005 From: mihir ti.com (Mody, Mihir) Date: Wed Jan 19 13:18:09 2005 Subject: [Mp4-tech] [System][Audio] Message-ID: <0908EAA859AF3641B7D9BEDAB8DD6A74C36E86@dbde2k01.itg.ti.com> Hi Ryan, It is AAC RAW frame defined in Audio part of specification. Regards, Mihir -----Original Message----- From: mp4-tech-bounces@lists.mpegif.org [mailto:mp4-tech-bounces@lists.mpegif.org]On Behalf Of Ryan Lei Sent: Wednesday, January 19, 2024 4:16 AM To: mp4-tech@lists.mpegif.org Subject: [Mp4-tech] [System][Audio] Hi, Experts As I understand, when mux AAC-LC into 3gp/mp4 file, the decoderSpecificInformaiton structure will follow the ISO/IEC 14496-3, which then follow ISO/IEC 14496-3 subpart 4 for AAC-LC. We found that when we use QuickTime Pro to generate 3gp/mp4 file, the size of this part is usually 2 bytes, which only contain information about audio type, channel counf and sampling rate. My question is for AAC-LC in 3gp/mp4 file format, what is the Access Unit format for coded AAC-LC data, which document it is following? Thanks Ryan Lei, Software Engineer, Video Codec Handheld Products Department | ATI Technology Inc. 1.905.882.2600x2712 | www.ati.com -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20050119/ed969f7d/attachment.html From jammahesh gmail.com Wed Jan 19 15:49:09 2005 From: jammahesh gmail.com (arul mahesh) Date: Wed Jan 19 16:24:18 2005 Subject: [Mp4-tech] Size of Ecodestrm in EncodingEnvironment ? Message-ID: <9a1d782d050119064931922f0e@mail.gmail.com> Hi , I am a newbie to AVC. I would like to know the size of Ecodestrm in EncodingEnvironment structure. I mean about the maximum size of the pointer array Ecodestrm. (Data types for CABAC, global.h) best regards, Arul From Thammi_Reddy Satyam.com Thu Jan 20 20:03:34 2005 From: Thammi_Reddy Satyam.com (Thammi_Reddy) Date: Thu Jan 20 16:30:16 2005 Subject: [Mp4-tech] some doubts in H.264 Message-ID: <3D9FDCA910DD4445896A0BE5ECF009D40259A994@bla.satyam.com> Hi all, Please answer to following questions related to H.264. 1. What is the significance of picture order count and what are its values for baseline profile? 2. How often 'seq_parameter_set_id' changes. Why the upper limit of 31? 3. Suppose we need a particular type of intra prediction, say horizontal, Is it possible to get the encoded bit stream? 4. What is the use of frame cropping, gaps in frames, P_skip, B_skip? 5. How to choose which of the stored reference pictures to use for prediction? Does this information come from encoder? The processing is more if the decision to be taken by the decoder. Please comment. 6. Intra/Inter decision also taken by the encoder? ************************************************************************** This email (including any attachments) is intended for the sole use of the intended recipient/s and may contain material that is CONFIDENTIAL AND PRIVATE COMPANY INFORMATION. Any review or reliance by others or copying or distribution or forwarding of any or all of the contents in this message is STRICTLY PROHIBITED. If you are not the intended recipient, please contact the sender by email and delete all copies; your cooperation in this regard is appreciated. ************************************************************************** From lichu1025 yahoo.com.tw Fri Jan 21 12:39:29 2005 From: lichu1025 yahoo.com.tw (=?big5?q?=C4R=A6=CB?=) Date: Fri Jan 21 08:30:19 2005 Subject: [Mp4-tech] Add som errors in H.264 bitstream Message-ID: <20050121043929.51217.qmail@web17907.mail.tpe.yahoo.com> Hello..... I want to add some errors in the encoding bitstream,and see the decoder result.Could anyone help me to do this?? thanks a lot best regards Judy --------------------------------- Yahoo!奇摩電子信箱 一人一信送愛心，Yahoo!奇摩兒童助學計畫。馬上參加 -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20050121/3667b71a/attachment.html From garysull windows.microsoft.com Fri Jan 21 01:01:54 2005 From: garysull windows.microsoft.com (Gary Sullivan) Date: Fri Jan 21 11:15:26 2005 Subject: [Mp4-tech] Add som errors in H.264 bitstream Message-ID: <91D7F2CEE3425A4A9D11311D09FCE2460CB796EF@WIN-MSG-10.wingroup.windeploy.ntdev.microsoft.com> Judy et al, To do a good test of error/loss robustness characteristics takes a lot of work. The encoder needs to be optimized to produce a robust bitstream. The system-level model for what happens to the bitstream should be set up to be appropriate for the intended application environment. And the decoder should be designed to have extra capabilities (not specified in the standard) to cope with bad bitstream data. The standard is designed to provide features that can be used by encoders and decoders to enable robustness to errors and data losses. However, it does not require encoders or decoders to use those features well. The standard only specifies how decoders should decode bitstreams that are correct and error-free. How a decoder copes with such problems is a matter of design by the individual implementer. A number of research papers have been published on this topic. One of them is entitled 'Error Resiliency Schemes in H.264/AVC', and will appear in a Special issue of Elsevier JVCI on H.264/AVC in June-Aug. 2005. The paper is available at www.clarkson.edu/~skumar (Go to Publications sections; click on Paper #7). I suggest to also look for papers by Thomas Stockhammer. I published one with him a couple of years ago, and I'm aware of at least one more that he has written on the topic (with Miska Hannuksela), although it may not yet be published. I am sure there are also many other relevant publications on the topic by various authors. Best Regards, Gary Sullivan ________________________________ From: mp4-tech-bounces@lists.mpegif.org [mailto:mp4-tech-bounces@lists.mpegif.org] On Behalf Of ?? Sent: Thursday, January 20, 2024 8:39 PM To: mp4-tech@lists.mpegif.org Subject: [Mp4-tech] Add som errors in H.264 bitstream Hello..... I want to add some errors in the encoding bitstream,and see the decoder result.Could anyone help me to do this?? thanks a lot best regards Judy ________________________________ Yahoo!?????? ????????Yahoo!????????????? -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20050121/a0e1cedc/attachment.html From kaehsueh gmail.com Fri Jan 21 13:08:45 2005 From: kaehsueh gmail.com (Kae Hsueh) Date: Sat Jan 22 08:25:26 2005 Subject: [Mp4-tech] MPEG4, MPEG2, and MPEG1 Message-ID: This might be a stupid question. Can some one tell me if MPEG2 is backward compatible to MPEG1? It means can I use MPEG2 decoder to decode MPEG1 streams or files? Same go with MPEG-4. Can I use MPEG-4 decoder to decode MPEG1 or MPEG2 streams or files? Kae From kj090177 yahoo.com Fri Jan 21 15:17:35 2005 From: kj090177 yahoo.com (KJ Yang) Date: Sat Jan 22 08:30:17 2005 Subject: [Mp4-tech] I am looking for the MPEG4 encoder with data partitioning function Message-ID: <20050121231735.82741.qmail@web53507.mail.yahoo.com> Hi! Does anyone knows where can I get the MPEG 4 encoder with data partitioning function? I am trying to generate some test bitstram with data partitioning function. Thanks a lot __________________________________ Do you Yahoo!? Yahoo! Mail - now with 250MB free storage. Learn more. http://info.mail.yahoo.com/mail_250 From sathyavratha acmet.com Sun Jan 16 11:17:45 2005 From: sathyavratha acmet.com (Sathyavratha) Date: Sat Jan 22 08:30:22 2005 Subject: [MP4-Tech] video codec solution Message-ID: <000001c4fb8e$ea230d30$c700a8c0@sathyavratha> Hi experts, Could any one help me to find out the Momusys reference software document for MPEG-4 part 2 Visual. I've downloaded the reference software but could'nt find out document. Thanks in advance. sathyavratha -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20050116/b2c73c54/attachment.html From vikas veneratechnologies.com Sat Jan 22 13:59:31 2005 From: vikas veneratechnologies.com (Vikas Singhal) Date: Sat Jan 22 14:15:16 2005 Subject: [Mp4-tech] Add som errors in H.264 bitstream References: <91D7F2CEE3425A4A9D11311D09FCE2460CB796EF@WIN-MSG-10.wingroup.windeploy.ntdev.microsoft.com> Message-ID: <00b801c5005c$811d9d00$680ba8c0@MAYA> Hi Judy, We are working on a tool which can induce errors in an existing H.264 and MPEG-4 stream. The tool will be capable of taking the configuration from the user as to what kind of errors needs to be introduced. You can communicate directly with me at vikas@veneratechnologies.com regarding this. Best Regards Vikas -------------------------------------------------------------------------------- From: mp4-tech-bounces@lists.mpegif.org [mailto:mp4-tech-bounces@lists.mpegif.org] On Behalf Of ?? Sent: Thursday, January 20, 2024 8:39 PM To: mp4-tech@lists.mpegif.org Subject: [Mp4-tech] Add som errors in H.264 bitstream Hello..... I want to add some errors in the encoding bitstream,and see the decoder result.Could anyone help me to do this?? thanks a lot best regards Judy ---------------------------------------------------------------------------- Yahoo!?????? ????????Yahoo!????????????? ------------------------------------------------------------------------------ _______________________________________________ NOTE: Please use clear subject lines for your posts. Include [audio, [video], [systems], [general] or another apppropriate identifier to indicate the type of question you have. Note: Conduct on the mailing list is subject to the Antitrust guidelines found at http://www.mpegif.org/public/documents/vault/mp-out-30042-Antitrust.php -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20050122/fda88973/attachment.html From parth.dixit samsung.com Sat Jan 22 16:24:27 2005 From: parth.dixit samsung.com (Parth Dixit) Date: Sat Jan 22 14:18:20 2005 Subject: [Mp4-tech] MPEG4, MPEG2, and MPEG1 References: Message-ID: <001001c50070$bef2af80$325c6c6b@dd> hi, mpeg-2 is backward compatible with mpeg1. MPEG4 is also compatible with h.263 in short header mode but i don't know if it is compatible with MPEG-2. parth ----- Original Message ----- From: "Kae Hsueh" To: Sent: Friday, January 21, 2024 11:38 PM Subject: [Mp4-tech] MPEG4, MPEG2, and MPEG1 > This might be a stupid question. Can some one tell me if MPEG2 is > backward compatible to MPEG1? It means can I use MPEG2 decoder to > decode MPEG1 streams or files? > > Same go with MPEG-4. Can I use MPEG-4 decoder to decode MPEG1 or MPEG2 > streams or files? > > Kae > _______________________________________________ > 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 > > From garysull windows.microsoft.com Sat Jan 22 00:32:12 2005 From: garysull windows.microsoft.com (Gary Sullivan) Date: Sat Jan 22 14:19:57 2005 Subject: [Mp4-tech] MPEG4, MPEG2, and MPEG1 Message-ID: <91D7F2CEE3425A4A9D11311D09FCE2460CBD3F45@WIN-MSG-10.wingroup.windeploy.ntdev.microsoft.com> +> Can I use MPEG2 decoder to decode MPEG1 streams or files? In the case of video, the answer to this question is Yes. The MPEG-2 video standard is a basically-straightforward extension of the MPEG-1 technology, and this kind of compatibility is required in the MPEG-2 video standard. +> Can I use MPEG-4 decoder to decode +> MPEG1 or MPEG2 +> streams or files? In the case of video, the answer to this question is ... Maybe. To put it more precisely, the MPEG-4 standard does not require a product to have this capablity. However, MPEG-4 product makers may want their product to have that capability and would put it in their product voluntarily. Best Regards, Gary Sullivan +> -----Original Message----- +> From: mp4-tech-bounces@lists.mpegif.org +> [mailto:mp4-tech-bounces@lists.mpegif.org] On Behalf Of Kae Hsueh +> Sent: Friday, January 21, 2024 10:09 AM +> To: mp4-tech@lists.mpegif.org +> Subject: [Mp4-tech] MPEG4, MPEG2, and MPEG1 +> +> This might be a stupid question. Can some one tell me if MPEG2 is +> backward compatible to MPEG1? It means can I use MPEG2 decoder to +> decode MPEG1 streams or files? +> +> Same go with MPEG-4. Can I use MPEG-4 decoder to decode +> MPEG1 or MPEG2 +> streams or files? +> +> Kae +> _______________________________________________ +> 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 parth.dixit samsung.com Sat Jan 22 17:35:47 2005 From: parth.dixit samsung.com (Parth Dixit) Date: Sat Jan 22 14:21:40 2005 Subject: [Mp4-tech] I am looking for the MPEG4 encoder with data partitioning function References: <20050121231735.82741.qmail@web53507.mail.yahoo.com> Message-ID: <000801c5007a$b676db60$325c6c6b@dd> hi, did u checked the reference software available with iso site? there r two mpeg4 encoders that are provided one is microsoft's refernce implementation in c++ and the other is MoMusys encoder which is implemented in C.You can get them from the link given below http://www.iso.ch/iso/en/ittf/PubliclyAvailableStandards/ISO_IEC_14496-5_2001_Software_Reference/ ----- Original Message ----- From: "KJ Yang" To: Sent: Saturday, January 22, 2024 4:47 AM Subject: [Mp4-tech] I am looking for the MPEG4 encoder with data partitioning function > Hi! Does anyone knows where can I get the MPEG 4 > encoder with data partitioning function? I am trying > to generate some test bitstram with data partitioning > function. Thanks a lot > > > > > > > __________________________________ > Do you Yahoo!? > Yahoo! Mail - now with 250MB free storage. Learn more. > http://info.mail.yahoo.com/mail_250 > _______________________________________________ > 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 > > From Danijel.Domazet zg.htnet.hr Mon Jan 24 09:03:53 2005 From: Danijel.Domazet zg.htnet.hr (D.Domazet) Date: Mon Jan 24 14:15:57 2005 Subject: [Mp4-tech] [audio] High frequency cut-off in AAC - ways of implementing the filter? Message-ID: <002f01c501eb$3f7fce50$0100a8c0@FREZA> Hi MP4-Tech, Is zeroing appropriate MDCT samples acceptable as a lowpass filter in AAC? What are other recommended/possible ways of implementing the lowpass? Daniel From Danijel.Domazet zg.htnet.hr Mon Jan 24 09:06:52 2005 From: Danijel.Domazet zg.htnet.hr (D.Domazet) Date: Mon Jan 24 14:18:49 2005 Subject: [Mp4-tech] How complex is SBR (HE-AAC) ENcoding? Message-ID: <003501c501eb$a9d8d7b0$0100a8c0@FREZA> Hi MP4-Tech, Could someone give me an estimation on AAC SBR ENCODER implementation complexity? I mean, how complex is SBR implementation with respect to the tools included in AAC LC? How much work is it? Daniel From Danijel.Domazet zg.htnet.hr Mon Jan 24 09:08:56 2005 From: Danijel.Domazet zg.htnet.hr (D.Domazet) Date: Mon Jan 24 14:20:40 2005 Subject: [Mp4-tech] AAC transparency bitrates for sampling rates other than 44.1? Message-ID: <003b01c501eb$f3f63b30$0100a8c0@FREZA> Hi MP4-Tech, Let's say that AAC encoded 44100 Hz sampling rate stereo signal is transparent at 128 kbps stereo. Does anyone have any suggestions regarding the transparency bitrates for sampling rates other than 44100 Hz, like 16000 Hz for example (mono and stereo)? Daniel From bharatsoni gmail.com Mon Jan 24 14:24:18 2005 From: bharatsoni gmail.com (Bharat Soni) Date: Mon Jan 24 14:22:28 2005 Subject: [Mp4-tech] MPEG4, MPEG2, and MPEG1 In-Reply-To: <91D7F2CEE3425A4A9D11311D09FCE2460CBD3F45@WIN-MSG-10.wingroup.windeploy.ntdev.microsoft.com> References: <91D7F2CEE3425A4A9D11311D09FCE2460CBD3F45@WIN-MSG-10.wingroup.windeploy.ntdev.microsoft.com> Message-ID: Hi Gary, Is it not true that MPEG-4 video bitstream syntax is different than MPEG2/1 bitstream syntax. Then would it not be more appropriate to simply say MPEG-4 decoder can't decode MOEG-1/2 streams? Correct me if I am wrong. Regards, Bharat On Sat, 22 Jan 2024 00:32:12 -0800, Gary Sullivan wrote: > > +> Can I use MPEG2 decoder to decode MPEG1 streams or files? > > In the case of video, the answer to this question is Yes. The MPEG-2 > video standard is a basically-straightforward extension of the MPEG-1 > technology, and this kind of compatibility is required in the MPEG-2 > video standard. > > +> Can I use MPEG-4 decoder to decode > +> MPEG1 or MPEG2 > +> streams or files? > > > In the case of video, the answer to this question is ... Maybe. > > To put it more precisely, the MPEG-4 standard does not require a product > to have this capablity. > However, MPEG-4 product makers may want their product to have that > capability and would put it in their product voluntarily. > > Best Regards, > > Gary Sullivan > > +> -----Original Message----- > +> From: mp4-tech-bounces@lists.mpegif.org > +> [mailto:mp4-tech-bounces@lists.mpegif.org] On Behalf Of Kae Hsueh > +> Sent: Friday, January 21, 2024 10:09 AM > +> To: mp4-tech@lists.mpegif.org > +> Subject: [Mp4-tech] MPEG4, MPEG2, and MPEG1 > +> > +> This might be a stupid question. Can some one tell me if MPEG2 is > +> backward compatible to MPEG1? It means can I use MPEG2 decoder to > +> decode MPEG1 streams or files? > +> > +> Same go with MPEG-4. Can I use MPEG-4 decoder to decode > +> MPEG1 or MPEG2 > +> streams or files? > +> > +> Kae > +> _______________________________________________ > +> 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 > +> > > _______________________________________________ > 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 > From grwang ict.ac.cn Mon Jan 24 18:23:12 2005 From: grwang ict.ac.cn (=?gb2312?B?zfXI2bjV?=) Date: Mon Jan 24 15:07:13 2005 Subject: [Mp4-tech] about H.264/AVC standard document Message-ID: <006701c501fe$b52c0890$a82ae29f@ictgrwang> hello,experts: In h.264/AVC standard document(JVT-G050r1,Page 86) there is a paragraph about FMO decoding: Otherwise (frame_mbs_only_flag is equal to 0 and mb_adaptive_frame_field_flag is equal to 0 and field_pic_flag is equal to 0), the macroblock to slice group map is specified by: MbToSliceGroupMap[ i ] = mapUnitToSliceGroupMap[ ( i / ( 2 * PicWidthInMbs ) ) * PicWidthInMbs + ( i % PicWidthInMbs ) ] (8-27) who can tell me what's the picture type(frame or field or others) if "frame_mbs_only_flag is equal to 0 and mb_adaptive_frame_field_flag is equal to 0 and field_pic_flag is equal to 0"? thanks! ronggang -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20050124/a594d3b3/attachment.html From grwang ict.ac.cn Mon Jan 24 19:01:22 2005 From: grwang ict.ac.cn (=?gb2312?B?zfXI2bjV?=) Date: Mon Jan 24 15:09:21 2005 Subject: [Mp4-tech] about H.264/AVC standard document Message-ID: <00a801c50204$0a7ff590$a82ae29f@ictgrwang> hello,experts: In h.264/AVC standard document(JVT-G050r1,Page 86) there is a paragraph about FMO decoding: "Otherwise (frame_mbs_only_flag is equal to 0 and mb_adaptive_frame_field_flag is equal to 0 and field_pic_flag is equal to 0), the macroblock to slice group map is specified by: MbToSliceGroupMap[ i ] = mapUnitToSliceGroupMap[ ( i / ( 2 * PicWidthInMbs ) ) * PicWidthInMbs + ( i % PicWidthInMbs ) ] (8-27)" who can tell me what's the picture type(frame or field or others) if "frame_mbs_only_flag is equal to 0 and mb_adaptive_frame_field_flag is equal to 0 and field_pic_flag is equal to 0"? thanks! ronggang -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20050124/d2458d94/attachment.html From garysull windows.microsoft.com Mon Jan 24 09:24:36 2005 From: garysull windows.microsoft.com (Gary Sullivan) Date: Mon Jan 24 21:45:58 2005 Subject: [Mp4-tech] about H.264/AVC standard document Message-ID: <91D7F2CEE3425A4A9D11311D09FCE2460CC383AE@WIN-MSG-10.wingroup.windeploy.ntdev.microsoft.com> With field_pic_flag equal to 0 and mb-aff turned off, I think you're talking about an ordinary frame. BTW you should get ahold of something more recent than G050r1. That's from several iterations ago. -G. ________________________________ From: mp4-tech-bounces@lists.mpegif.org [mailto:mp4-tech-bounces@lists.mpegif.org] On Behalf Of ??? Sent: Monday, January 24, 2024 3:01 AM To: mp4-tech@lists.mpegif.org Subject: [Mp4-tech] about H.264/AVC standard document hello,experts: In h.264/AVC standard document(JVT-G050r1,Page 86) there is a paragraph about FMO decoding: "Otherwise (frame_mbs_only_flag is equal to 0 and mb_adaptive_frame_field_flag is equal to 0 and field_pic_flag is equal to 0), the macroblock to slice group map is specified by: MbToSliceGroupMap[ i ] = mapUnitToSliceGroupMap[ ( i / ( 2 * PicWidthInMbs ) ) * PicWidthInMbs + ( i % PicWidthInMbs ) ] (8-27)" who can tell me what's the picture type(frame or field or others) if "frame_mbs_only_flag is equal to 0 and mb_adaptive_frame_field_flag is equal to 0 and field_pic_flag is equal to 0"? thanks! ronggang -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20050124/5856f54f/attachment.html From garysull windows.microsoft.com Mon Jan 24 09:28:41 2005 From: garysull windows.microsoft.com (Gary Sullivan) Date: Mon Jan 24 21:46:05 2005 Subject: [Mp4-tech] MPEG4, MPEG2, and MPEG1 Message-ID: <91D7F2CEE3425A4A9D11311D09FCE2460CC383C1@WIN-MSG-10.wingroup.windeploy.ntdev.microsoft.com> I was trying to convey a more complete picture than that. For example, there are four decoder chips today that can decode MPEG-4 AVC at HD resolution (Broadcom, Sigma, ST Micro, and Conexant). Three of those four (all but the Conexant CX2418x) can also decode MPEG-2. Best regards, Gary Sullivan +> -----Original Message----- +> From: mp4-tech-bounces@lists.mpegif.org +> [mailto:mp4-tech-bounces@lists.mpegif.org] On Behalf Of Bharat Soni +> Sent: Monday, January 24, 2024 12:54 AM +> To: Gary Sullivan +> Cc: Kae Hsueh; mp4-tech@lists.mpegif.org +> Subject: Re: [Mp4-tech] MPEG4, MPEG2, and MPEG1 +> +> Hi Gary, +> +> Is it not true that MPEG-4 video bitstream syntax is different than +> MPEG2/1 bitstream syntax. Then would it not be more appropriate to +> simply say MPEG-4 decoder can't decode MOEG-1/2 streams? +> Correct me if I am wrong. +> +> Regards, +> Bharat +> +> +> On Sat, 22 Jan 2024 00:32:12 -0800, Gary Sullivan +> wrote: +> > +> > +> Can I use MPEG2 decoder to decode MPEG1 streams or files? +> > +> > In the case of video, the answer to this question is Yes. +> The MPEG-2 +> > video standard is a basically-straightforward extension of +> the MPEG-1 +> > technology, and this kind of compatibility is required in +> the MPEG-2 +> > video standard. +> > +> > +> Can I use MPEG-4 decoder to decode +> > +> MPEG1 or MPEG2 +> > +> streams or files? +> > +> > +> > In the case of video, the answer to this question is ... Maybe. +> > +> > To put it more precisely, the MPEG-4 standard does not +> require a product +> > to have this capablity. +> > However, MPEG-4 product makers may want their product to have that +> > capability and would put it in their product voluntarily. +> > +> > Best Regards, +> > +> > Gary Sullivan +> > +> > +> -----Original Message----- +> > +> From: mp4-tech-bounces@lists.mpegif.org +> > +> [mailto:mp4-tech-bounces@lists.mpegif.org] On Behalf Of +> Kae Hsueh +> > +> Sent: Friday, January 21, 2024 10:09 AM +> > +> To: mp4-tech@lists.mpegif.org +> > +> Subject: [Mp4-tech] MPEG4, MPEG2, and MPEG1 +> > +> +> > +> This might be a stupid question. Can some one tell me +> if MPEG2 is +> > +> backward compatible to MPEG1? It means can I use MPEG2 +> decoder to +> > +> decode MPEG1 streams or files? +> > +> +> > +> Same go with MPEG-4. Can I use MPEG-4 decoder to decode +> > +> MPEG1 or MPEG2 +> > +> streams or files? +> > +> +> > +> Kae +> > +> _______________________________________________ +> > +> 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 +> > +> +> > +> > _______________________________________________ +> > 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 +> > +> _______________________________________________ +> 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 faithful_seagull yahoo.com.au Tue Jan 25 03:29:09 2005 From: faithful_seagull yahoo.com.au (K.) Date: Tue Jan 25 10:08:21 2005 Subject: [Mp4-tech] .avi to .264 converter, .mp4 to .264 converter Message-ID: <20050125032909.195.qmail@web61204.mail.yahoo.com> Hi there, would any one know where can I find a converter or demultiplexer that would strip out H.264 bitstream from .avi files, that is, from .avi to .264? Also, is there a converter or demultiplexer that would convert .mp4 files into .264 files? Thanks in advance, Kathy --------------------------------- ALL-NEW Yahoo! Messenger - all new features - even more fun! -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20050125/bd837d88/attachment.html From srikantha.sd ap.sony.com Tue Jan 25 10:26:22 2005 From: srikantha.sd ap.sony.com (Srikantha SD) Date: Tue Jan 25 10:10:30 2005 Subject: [Mp4-tech] Hello Message-ID: <006c01c5029a$374cdb10$2066582b@srikanthasd> Srikantha SD,Hi, Can any body tell me about the latest JVT Specification?I have G050r1...Is there any latest version to it? Thanks a lot and have a nice day. -Regards, Sriks -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20050125/0778d29b/attachment.html From bharatsoni gmail.com Tue Jan 25 12:39:55 2005 From: bharatsoni gmail.com (Bharat Soni) Date: Tue Jan 25 10:11:53 2005 Subject: [Mp4-tech] MPEG4, MPEG2, and MPEG1 In-Reply-To: <91D7F2CEE3425A4A9D11311D09FCE2460CC383C1@WIN-MSG-10.wingroup.windeploy.ntdev.microsoft.com> References: <91D7F2CEE3425A4A9D11311D09FCE2460CC383C1@WIN-MSG-10.wingroup.windeploy.ntdev.microsoft.com> Message-ID: Dear Gary, Thanks for the information. I agree with your reply. My reply was at the individual codec level as I interpreted the question to be decoder specific (Can I use MPEG-4 decoder to decode MPEG1 or MPEG2 streams?) But yes at the application/chip level, if the support for both MPEG-2 and MPEG-4 decoder is available, then as you have said, both type of stream can be decoded by same application/chip. Thanks again for the useful information. Regards, Bharat On Mon, 24 Jan 2024 09:28:41 -0800, Gary Sullivan wrote: > > I was trying to convey a more complete picture than that. For example, > there are four decoder chips today that can decode MPEG-4 AVC at HD > resolution (Broadcom, Sigma, ST Micro, and Conexant). Three of those > four (all but the Conexant CX2418x) can also decode MPEG-2. > > Best regards, > > Gary Sullivan > > +> -----Original Message----- > +> From: mp4-tech-bounces@lists.mpegif.org > +> [mailto:mp4-tech-bounces@lists.mpegif.org] On Behalf Of Bharat Soni > +> Sent: Monday, January 24, 2024 12:54 AM > +> To: Gary Sullivan > +> Cc: Kae Hsueh; mp4-tech@lists.mpegif.org > +> Subject: Re: [Mp4-tech] MPEG4, MPEG2, and MPEG1 > +> > +> Hi Gary, > +> > +> Is it not true that MPEG-4 video bitstream syntax is different than > +> MPEG2/1 bitstream syntax. Then would it not be more appropriate to > +> simply say MPEG-4 decoder can't decode MOEG-1/2 streams? > +> Correct me if I am wrong. > +> > +> Regards, > +> Bharat > +> > +> > +> On Sat, 22 Jan 2024 00:32:12 -0800, Gary Sullivan > +> wrote: > +> > > +> > +> Can I use MPEG2 decoder to decode MPEG1 streams or files? > +> > > +> > In the case of video, the answer to this question is Yes. > +> The MPEG-2 > +> > video standard is a basically-straightforward extension of > +> the MPEG-1 > +> > technology, and this kind of compatibility is required in > +> the MPEG-2 > +> > video standard. > +> > > +> > +> Can I use MPEG-4 decoder to decode > +> > +> MPEG1 or MPEG2 > +> > +> streams or files? > +> > > +> > > +> > In the case of video, the answer to this question is ... Maybe. > +> > > +> > To put it more precisely, the MPEG-4 standard does not > +> require a product > +> > to have this capablity. > +> > However, MPEG-4 product makers may want their product to have that > +> > capability and would put it in their product voluntarily. > +> > > +> > Best Regards, > +> > > +> > Gary Sullivan > +> > > +> > +> -----Original Message----- > +> > +> From: mp4-tech-bounces@lists.mpegif.org > +> > +> [mailto:mp4-tech-bounces@lists.mpegif.org] On Behalf Of > +> Kae Hsueh > +> > +> Sent: Friday, January 21, 2024 10:09 AM > +> > +> To: mp4-tech@lists.mpegif.org > +> > +> Subject: [Mp4-tech] MPEG4, MPEG2, and MPEG1 > +> > +> > +> > +> This might be a stupid question. Can some one tell me > +> if MPEG2 is > +> > +> backward compatible to MPEG1? It means can I use MPEG2 > +> decoder to > +> > +> decode MPEG1 streams or files? > +> > +> > +> > +> Same go with MPEG-4. Can I use MPEG-4 decoder to decode > +> > +> MPEG1 or MPEG2 > +> > +> streams or files? > +> > +> > +> > +> Kae > +> > +> _______________________________________________ > +> > +> 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 > +> > +> > +> > > +> > _______________________________________________ > +> > 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 > +> > > +> _______________________________________________ > +> 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 parth.dixit samsung.com Tue Jan 25 18:13:09 2005 From: parth.dixit samsung.com (Parth Dixit) Date: Tue Jan 25 11:39:25 2005 Subject: [Mp4-tech] .avi to .264 converter, .mp4 to .264 converter References: <20050125032909.195.qmail@web61204.mail.yahoo.com> Message-ID: <001401c502db$6e1af140$325c6c6b@dd> hi, try ffmpeg it is available from this site http://ffmpeg.sourceforge.net/index.php ----- Original Message ----- From: K. To: mp4-tech@lists.mpegif.org Sent: Tuesday, January 25, 2024 8:59 AM Subject: [Mp4-tech] .avi to .264 converter, .mp4 to .264 converter Hi there, would any one know where can I find a converter or demultiplexer that would strip out H.264 bitstream from .avi files, that is, from .avi to .264? Also, is there a converter or demultiplexer that would convert .mp4 files into .264 files? Thanks in advance, Kathy ------------------------------------------------------------------------------ ALL-NEW Yahoo! Messenger - all new features - even more fun! ------------------------------------------------------------------------------ _______________________________________________ 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/20050125/0015f0fa/attachment-0001.html From steffen.maul philips.com Tue Jan 25 14:44:57 2005 From: steffen.maul philips.com (steffen.maul@philips.com) Date: Tue Jan 25 14:28:19 2005 Subject: [Mp4-tech] MPEG-4 field prediction and not_coded Message-ID: Hi experts, under which conditions it is possible to set a field predicted MB of a P-VOP to not-coded? I see problems because the field references are not transmitted in this case. Do the field references have a default value (top field for instance)? Thanks in advance for your answer, Steffen ---------------------------------------------------------------------------------------------------------------------- Steffen Maul Department Video Coding Consumer Businesses Innovation Center Hamburg Philips Semiconductors GmbH phone: +49 40 5613 3725 Stresemannallee 101 fax: +49 40 5613 3525 22529 Hamburg, Germany Intranet: http://pww.ich.sc.philips.com/ Intranet: http://pww.cc-vcs.sc.philips.com/ ---------------------------------------------------------------------------------------------------------------------- From brajib2000 hotmail.com Tue Jan 25 10:31:58 2005 From: brajib2000 hotmail.com (Rajib Bhattacharya) Date: Tue Jan 25 20:49:37 2005 Subject: [Mp4-tech] Elementart stream multiplexing into transport format In-Reply-To: <001401c502db$6e1af140$325c6c6b@dd> Message-ID: I have received a bunch of AVC elementary streams from various sources. Does anyone know of a utility that could packetize these in DVB transport format(13818-3) with simple, bare minimum PSI information to be used in a simulated headend setup. Thanks in advance, Rajib >From: Parth Dixit >Reply-To: Parth Dixit >To: "K." >CC: mp4-tech@lists.mpegif.org >Subject: Re: [Mp4-tech] .avi to .264 converter, .mp4 to .264 converter >Date: Tue, 25 Jan 2024 18:13:09 +0530 > >hi, > try ffmpeg it is available from this site >http://ffmpeg.sourceforge.net/index.php > ----- Original Message ----- > From: K. > To: mp4-tech@lists.mpegif.org > Sent: Tuesday, January 25, 2024 8:59 AM > Subject: [Mp4-tech] .avi to .264 converter, .mp4 to .264 converter > > > Hi there, would any one know where can I find a converter or >demultiplexer that would strip out H.264 bitstream from .avi files, that >is, from .avi to .264? Also, is there a converter or demultiplexer that >would convert .mp4 files into .264 files? > > Thanks in advance, Kathy > > >------------------------------------------------------------------------------ > ALL-NEW Yahoo! Messenger - all new features - even more fun! > > >------------------------------------------------------------------------------ > > > _______________________________________________ > 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 >_______________________________________________ >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 _________________________________________________________________ Express yourself instantly with MSN Messenger! Download today - it's FREE! http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/ From t.dove vqual.biz Tue Jan 25 12:26:20 2005 From: t.dove vqual.biz (Thomas Dove) Date: Tue Jan 25 20:57:13 2005 Subject: [Mp4-tech] Add some errors in H.264 bitstream References: <91D7F2CEE3425A4A9D11311D09FCE2460CB796EF@WIN-MSG-10.wingroup.windeploy.ntdev.microsoft.com> <00b801c5005c$811d9d00$680ba8c0@MAYA> Message-ID: <006701c5031c$268d76e0$cbb412c6@Earth> Judy, We already sell some sets of 'error' video test clips for H.264/AVC, called 'Vclips'. These clip sets incorporate errors that we have seen in real customer bitstreams from a large number of customers, over the past 18 months (while selling the Vprove analysis software tool). The error types include: - encoder errors (syntax errors, out-of-range values, elements not permitted in a particular Profile/Level, etc.) - transmission errors - errors due to the way the Elementary Stream is packed into a transport/container stream They provide a pretty extensive (independent) test covering a range of the common errors that your decoder is likely to have to deal with. There are 3 clip sets (each clip set incorporates many test streams): - VC-311 for Baseline Profile - VC-312 for Extended Profile - VC-313 for Main Profile Every test stream of every set has detailed documentation on the error, the consequences of the error, what the correct value is, and the syntax of the bitstream. These are available off-the-shelf (they have been available for around 9 months now), and are used by many companies around the world (such as Philips, Texas Instruments...). Regards, Thomas Dove Sales Manager Vqual Ltd. Trym Lodge 1 Henbury Road Bristol BS9 3HQ UK E-mail: t.dove@vqual.biz Direct tel.: +44 (0)117 373 6255 Mobile: +44 (0)7771 560 799 Direct fax: +44 (0)117 373 6250 Tel.: +44 (0)117 3101 244 Fax: +44 (0)117 3101 277 Web: www.vqual.biz ************************************************************ The information in this message is confidential and may be privileged. It is intended for the addressee alone. If you are not the intended recipient it is prohibited to disclose, use or copy this information. Please contact the sender immediately should this message have been transmitted incorrectly. ************************************************************ ------------------------------------------------------------------------------ From: mp4-tech-bounces@lists.mpegif.org [mailto:mp4-tech-bounces@lists.mpegif.org] On Behalf Of ?? Sent: Thursday, January 20, 2024 8:39 PM To: mp4-tech@lists.mpegif.org Subject: [Mp4-tech] Add som errors in H.264 bitstream Hello..... I want to add some errors in the encoding bitstream,and see the decoder result.Could anyone help me to do this?? thanks a lot best regards Judy -------------------------------------------------------------------------- Yahoo!?????? ????????Yahoo!????????????? ---------------------------------------------------------------------------- _______________________________________________ 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 ------------------------------------------------------------------------------ _______________________________________________ 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/20050125/73c525f1/attachment.html From garysull windows.microsoft.com Tue Jan 25 21:54:01 2005 From: garysull windows.microsoft.com (Gary Sullivan) Date: Thu Jan 27 00:57:21 2005 Subject: [Mp4-tech] Hello Message-ID: <91D7F2CEE3425A4A9D11311D09FCE2460CC8A479@WIN-MSG-10.wingroup.windeploy.ntdev.microsoft.com> The latest editor's draft released internally within the JVT is JVT-M050d4 (produced this month). Your Sony colleagues (e.g., the three on the on cc line) should be able to help you get a copy. The latest published official version available from ITU-T and ISO/IEC is also much more recent than JVT-G050r1 (which is from May 2003), but is still missing all changes made for addition of the Fidelity Range Extensions in mid-2004 (FRExt, corresponding to JVT-L047d12) and all corrections in progress for imminent approval in a new corrigendum under development (corresponding to JVT-M049d6 - this month). I believe the published versions correspond approximately to JVT-K051r1 (Spring 2004). Best Regards, Gary Sullivan ________________________________ From: mp4-tech-bounces@lists.mpegif.org [mailto:mp4-tech-bounces@lists.mpegif.org] On Behalf Of Srikantha SD Sent: Monday, January 24, 2024 8:56 PM To: mp4-tech@lists.mpegif.org Subject: [Mp4-tech] Hello Hi, Can any body tell me about the latest JVT Specification?I have G050r1...Is there any latest version to it? Thanks a lot and have a nice day. -Regards, Sriks -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20050125/83b93110/attachment.html From diabl035 yahoo.co.in Thu Jan 27 11:35:23 2005 From: diabl035 yahoo.co.in (diablo p) Date: Thu Jan 27 18:07:18 2005 Subject: [Mp4-tech] most probable intra mode Message-ID: <20050127113523.47563.qmail@web8401.mail.in.yahoo.com> hi i have read a paper 'Efficient Intra-Prediction Algorithm in H.264' written by Bojun Meng, Oscar C. Au*, Chi-Wah Wong, Hong-Kwai Lam. This tells one of the ways to predict the intra mode without full-search (also with RDO) But while implementation, it need the 'most-probable mode'. If the cost of this most probable mode is more than the treshold ..we go for kinda full search. Does anyone has an idea how to construct this table depending from the neighbouring macroblocks mode? plzz help thanx in advance bye tc D. Yahoo! India Matrimony: Find your life partneronline. -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20050127/83b67495/attachment.html From garysull windows.microsoft.com Thu Jan 27 10:20:26 2005 From: garysull windows.microsoft.com (Gary Sullivan) Date: Thu Jan 27 19:42:28 2005 Subject: [Mp4-tech] most probable intra mode Message-ID: <91D7F2CEE3425A4A9D11311D09FCE2460CCE3D55@WIN-MSG-10.wingroup.windeploy.ntdev.microsoft.com> The standard (when using CAVLC) uses one bit to indicate whether a particular mode is selected, and if not, then uses 3 bits (for luma prediction anyhow - something roughly similar for chroma) to indicate which of the other modes is used. So often the mode indicated by the single bit is informally called the "most probable mode" since that is the intent of the entropy coding design (although the text of the standard does not use that term). That is probably the mode you're looking for. The relevant section of the standard specifies how to figure out which mode that is. Best Regards, Gary Sullivan ________________________________ From: mp4-tech-bounces@lists.mpegif.org [mailto:mp4-tech-bounces@lists.mpegif.org] On Behalf Of diablo p Sent: Thursday, January 27, 2024 3:35 AM To: h264codec@yahoogroups.com; mp4-tech@lists.mpegif.org Subject: [Mp4-tech] most probable intra mode hi i have read a paper 'Efficient Intra-Prediction Algorithm in H.264' written by Bojun Meng, Oscar C. Au*, Chi-Wah Wong, Hong-Kwai Lam. This tells one of the ways to predict the intra mode without full-search (also with RDO) But while implementation, it need the 'most-probable mode'. If the cost of this most probable mode is more than the treshold ..we go for kinda full search. Does anyone has an idea how to construct this table depending from the neighbouring macroblocks mode? plzz help thanx in advance bye tc D. Yahoo! India Matrimony : Find your life partner online . -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20050127/c546ec8d/attachment.html From mdorlando univ.trieste.it Fri Jan 28 19:10:22 2005 From: mdorlando univ.trieste.it ( Marco D'Orlando) Date: Fri Jan 28 22:30:17 2005 Subject: [Mp4-tech] [MP4-teach][Video]H.264 in error prone environments Message-ID: <002401c50564$a26f2a70$7632698c@Olimpo> Dear Sir/Madam/Miss: I am very interested in the H.264 video coding/decoding in packet loss environment. I have download JM93 fom http://iphome.hhi.de/suehring/tml/download/ and I encode some sequences. I simulate the transmission of the stream recording packet loss trace using a separate network simulator. Then I remove RTP packets from the RTPoutput file. When I try to decode the stream I miss some errors and the decoding process doesn't end. I obtain some error messages from the decoder: Typically I obtain: "ERROR: failed to find NumCoeff/TrailingOnes" from the decoder then the decoding process stop!. Sometimes I obtain the message: "An unintentional loss of pictures occurs! Exit" I don't know why the decoder stop the decoding process. The stream received has a little bit of packets losses. I would like to complete the decoding process for evaluating the final user quality, but I don't know how to force the decoder to continue the decoding process. I hypotyse that some packets could be essential for the decoder, but I don't know how to identify and mark them. Please give me some advices. Best Regards, Marco D'Orlando -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20050128/a44263e6/attachment.html From mdellagn ati.com Fri Jan 28 15:41:50 2005 From: mdellagn ati.com (Mark Dell'Agnese) Date: Fri Jan 28 22:30:22 2005 Subject: [Mp4-tech] CAVLC limits Message-ID: Hello, I have a couple of questions regarding the level limits imposed on values that have been transformed and quantized for the INTRA 16x16 case. In the JM reference encoder, there is a term, CAVLC_LEVEL_LIMIT, which limits the absolute value of the transformed and quantized DC coeff's to 2063. What is the significance of 2063 (13-bits req'd)? Why not 2047 which uses a 12-bit signed number? And why isn't this restriction imposed on other coeff's for both 4x4 and 16x16 cases? Thanks, Mark. -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20050128/44a2098f/attachment.html From mdorlando univ.trieste.it Sat Jan 29 11:13:20 2005 From: mdorlando univ.trieste.it (mdorlando@univ.trieste.it) Date: Sat Jan 29 15:34:28 2005 Subject: [Mp4-tech] [Mp4-teach][Video]H.264 scalability Message-ID: <1106993600.41fb61c0211ad@webmail.units.it> Dear All, I am very interested in the H.264 video transmission in packet loss environment. I know the proposed extention - named scalability - of the H.264 standard. I read some papers on scalability extentions such as MCTF. I would like to simulate transmission of scalable streams and to evaluate final user performance. I download the MCTF codec and I generate test sequences, separating the layers and simulating transmission using network simulator. The received packets are then combined and decoded by the MCTF decoder. But a problem occurs: the decoding process doesn't end and the decoder generate some errors. I think that happens because the decoder works in an error-free environment. Is it right? Have you some advice about how to solve this problem? Could we insert a reference packet instead of the NAL lost? And now another problem. I notice that it is possible to encode a BL (base layer) using a separate encoder such as jm83. I try to decode a combined stream but the MCTF doesn't finish the decoding process. I think that there are some limitations in the h.264base layer encoder. For example, have I to select only a simlple profile or may I use all other features in the h.264 encoder (such as FMO,ASO,data partitioning, redundant slice)? Your advices would be of great help. Thank you in advance. Marco From d_ravu yahoo.com Sat Jan 29 01:03:46 2005 From: d_ravu yahoo.com (Ravi) Date: Sat Jan 29 15:43:24 2005 Subject: [Mp4-tech] another audio codec inside MP4 File In-Reply-To: Message-ID: <20050129090346.16547.qmail@web41906.mail.yahoo.com> Hi Experts, I want to know if another audio stream instead of Mpeg-4 AAC can be embedded inside the MP4 File Format. i.e if ac3 or mp3 audio can be added with MP-4 Elementary Stream (video) inside the MP4 File. Or same can be done with ISO Based Media file format. ========= Regards, Ravindra Dolas __________________________________ Do you Yahoo!? Meet the all-new My Yahoo! - Try it today! http://my.yahoo.com From shreya_pathak rediffmail.com Mon Jan 31 07:02:02 2005 From: shreya_pathak rediffmail.com (Shreya Pathak) Date: Mon Jan 31 09:18:53 2005 Subject: [Mp4-tech] Enhanced AAC plus Message-ID: <20050131070330.11331.qmail@webmail27.rediffmail.com> ? Hi All, I want to know where I can get the publicly available free source code of Enhanced AAC plus. Also I want to know where can I get the standard for Enhanced AAC plus or some documents related to Enhanced AAC plus. Thanks and Regards Shreya -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20050131/65cb31d5/attachment.html From kjk mcubeworks.com Mon Jan 31 18:39:42 2005 From: kjk mcubeworks.com (JK(Jeong Kwon) Kim) Date: Mon Jan 31 11:21:34 2005 Subject: [Mp4-tech] CAVLC limits In-Reply-To: Message-ID: Hi Mark, The escape code of CAVLC in H.264 has the 11-bit level data and one sign bit. But the escape code excludes smaller ones, so the range is extended by the number of smaller ones. suffixLength = 0, level range is [16+0, 16+2047] suffixLength = 1, level range is [16+0, 16+2047] suffixLength = 2, level range is [31+0, 31+2047] suffixLength = 3, level range is [61+0, 61+2047] suffixLength = 4, level range is [121+0, 121+2047] suffixLength = 5, level range is [241+0, 241+2047] suffixLength = 6, level range is [481+0, 481+2047] So, the common smallest level limit is "2047". And the reason to limit intra 16x16 DC and chroma DC in the following cited in another mail: ===================================================================== CAVLC is well-designed to encode coefficients. Its maximum value is: (+-255 * 16 * 13107 + rounding ) >> 15 = +-1632 [ in case of the largest prediction error and QP = 0] So, all the coefficients but 16x16 DC and chroma DC can be encoded by CAVLC. But, the maximum value of 16x16 DC transform coefficients (+-255 * 16 * 8 * 13107 + rounding ) >> 16 = +-6528 [ in case of the largest prediction error and QP = 0. The DC hadamard gain is '4' ] It is out of the range of CAVLC. So, there is a NOTE at the end of 8.5.6, JVT-J010d7.doc.(previously discussed) NOTE - When entropy_coding_mode_flag is equal to 0 and QPY is less than 10, the range of values that can be represented for the elements cij of c is not sufficient to represent the full range of values of the elements dcYij of dcY that could be necessary to form a close approximation of the content of any possible source picture by use of the Intra_16x16 macroblock type Chroma DC is similar case. ===================================================================== Regards, JK Kim, MTS, McubeWorks inc. -----Original Message----- From: mp4-tech-bounces@lists.mpegif.org [mailto:mp4-tech-bounces@lists.mpegif.org]On Behalf Of Mark Dell'Agnese Sent: Saturday, January 29, 2024 5:42 AM To: mp4-tech@lists.mpegif.org Subject: [Mp4-tech] CAVLC limits Hello, I have a couple of questions regarding the level limits imposed on values that have been transformed and quantized for the INTRA 16x16 case. In the JM reference encoder, there is a term, CAVLC_LEVEL_LIMIT, which limits the absolute value of the transformed and quantized DC coeff's to 2063. What is the significance of 2063 (13-bits req'd)? Why not 2047 which uses a 12-bit signed number? And why isn't this restriction imposed on other coeff's for both 4x4 and 16x16 cases? Thanks, Mark. From Sastry_KRK Satyam.com Mon Jan 31 16:57:20 2005 From: Sastry_KRK Satyam.com (Sastry_KRK) Date: Mon Jan 31 12:19:32 2005 Subject: [Mp4-tech] frame_num, h.264 Message-ID: <3D9FDCA910DD4445896A0BE5ECF009D40277B400@bla.satyam.com> hello experts, frame_num may not take a value equal to prevREfframeNum, in addition to two other conditions , the following condition is true " the current picture and the preceding reference picture are reference fields having opposite parity " suppose only frames support is there and no support for fields, the frame_num will never be equal to prevREfframeNum. could any one explain this behavior regards KRK Sastry ************************************************************************** This email (including any attachments) is intended for the sole use of the intended recipient/s and may contain material that is CONFIDENTIAL AND PRIVATE COMPANY INFORMATION. Any review or reliance by others or copying or distribution or forwarding of any or all of the contents in this message is STRICTLY PROHIBITED. If you are not the intended recipient, please contact the sender by email and delete all copies; your cooperation in this regard is appreciated. ************************************************************************** From Sastry_KRK Satyam.com Mon Jan 31 17:02:29 2005 From: Sastry_KRK Satyam.com (Sastry_KRK) Date: Mon Jan 31 12:24:21 2005 Subject: [Mp4-tech] reference pictures Message-ID: <3D9FDCA910DD4445896A0BE5ECF009D40277B420@bla.satyam.com> hi experts, what limits the number of refernce pictures to be sent in a coded video sequence regards KRK Sastry ************************************************************************** This email (including any attachments) is intended for the sole use of the intended recipient/s and may contain material that is CONFIDENTIAL AND PRIVATE COMPANY INFORMATION. Any review or reliance by others or copying or distribution or forwarding of any or all of the contents in this message is STRICTLY PROHIBITED. If you are not the intended recipient, please contact the sender by email and delete all copies; your cooperation in this regard is appreciated. ************************************************************************** From Sastry_KRK Satyam.com Mon Jan 31 17:08:21 2005 From: Sastry_KRK Satyam.com (Sastry_KRK) Date: Mon Jan 31 12:26:43 2005 Subject: [Mp4-tech] rbsp trailing bits, h.264 Message-ID: <3D9FDCA910DD4445896A0BE5ECF009D40277B446@bla.satyam.com> hi experts, in the decoder, rbsp trailing bit verification to be done with golomb opertaed bits or after inverse golomb operation regards KRK Sastry ************************************************************************** This email (including any attachments) is intended for the sole use of the intended recipient/s and may contain material that is CONFIDENTIAL AND PRIVATE COMPANY INFORMATION. Any review or reliance by others or copying or distribution or forwarding of any or all of the contents in this message is STRICTLY PROHIBITED. If you are not the intended recipient, please contact the sender by email and delete all copies; your cooperation in this regard is appreciated. ************************************************************************** From vikass gmail.com Mon Jan 31 19:04:10 2005 From: vikass gmail.com (Vikas Singhal) Date: Mon Jan 31 18:09:25 2005 Subject: [Mp4-tech] another audio codec inside MP4 File Message-ID: Hi Ravi, You can very well embedd other streams in the MP4 file format. You need to specify a proper ObjectTypeIndication for the corresponding format in DecoderConfigDescriptor in ES_Descriptor. Regards Vikas ----- Original Message ----- From: "Ravi" To: Sent: Saturday, January 29, 2024 2:33 PM Subject: [Mp4-tech] another audio codec inside MP4 File > > Hi Experts, > > I want to know if another audio stream instead of Mpeg-4 AAC > can be embedded inside the MP4 File Format. > > i.e if ac3 or mp3 audio can be added with MP-4 Elementary Stream (video) > inside the MP4 File. > > Or same can be done with ISO Based Media file format. > > > ========= > > Regards, > > Ravindra Dolas > > > > __________________________________ > Do you Yahoo!? > Meet the all-new My Yahoo! - Try it today! > http://my.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 >