From axel.binder philips.com Mon Jul 9 10:59:23 2001 From: axel.binder philips.com (axel.binder@philips.com) Date: Wed Jul 30 14:06:35 2003 Subject: [M4IF Technotes] MPEG-4 Question about alpha values Message-ID: Hi, I found several places where alpha values are calculated for gray level shapes and during BIFS lighting. However, I couldn't find any place where these values (from the frame buffer, composed scene) are used again. Did I miss something or are the calculations of the destination alpha values obsolete? Thanks in advance Axel ===================================================== Axel Binder Philips Starnberg Development Manager Software Petersbrunner Str. 17 D-82319 Starnberg phone: +49 8151 270 108 Germany fax: +49 8151 270 200 mobile: +49 172 92 18 623 e-mail: axel.binder@philips.com ===================================================== From axel.binder philips.com Mon Jul 9 10:59:23 2001 From: axel.binder philips.com (axel.binder@philips.com) Date: Wed Jul 30 14:06:35 2003 Subject: [M4IF Technotes] [M4IF Infolist] MPEG-4 Question about alpha values Message-ID: Hi, I found several places where alpha values are calculated for gray level shapes and during BIFS lighting. However, I couldn't find any place where these values (from the frame buffer, composed scene) are used again. Did I miss something or are the calculations of the destination alpha values obsolete? Thanks in advance Axel ===================================================== Axel Binder Philips Starnberg Development Manager Software Petersbrunner Str. 17 D-82319 Starnberg phone: +49 8151 270 108 Germany fax: +49 8151 270 200 mobile: +49 172 92 18 623 e-mail: axel.binder@philips.com ===================================================== _______________________________________________ M4IF General Information list Infolist@lists.m4if.org http://lists.m4if.org/mailman/listinfo/infolist From renaud envivio.com Mon Jul 9 11:38:09 2001 From: renaud envivio.com (Renaud Cazoulat) Date: Wed Jul 30 14:06:35 2003 Subject: [M4IF Technotes] MPEG-4 Question about alpha values References: Message-ID: <3B496D71.72848CE5@envivio.com> Hi, You probably should have a look to the VRML documentation (a good start is http://www.best.com/~rikk/Book/) Renaud Envivio axel.binder@philips.com wrote: > Hi, > > I found several places where alpha values are calculated > for gray level shapes and during BIFS lighting. However, > I couldn't find any place where these values (from the frame > buffer, composed scene) are used again. Did I miss something > or are the calculations of the destination alpha values > obsolete? From axel.binder philips.com Tue Jul 10 18:23:58 2001 From: axel.binder philips.com (axel.binder@philips.com) Date: Wed Jul 30 14:06:35 2003 Subject: [M4IF Technotes] OBMC, for which visual profile Message-ID: Hi, can anybody tell me for which visual profiles the "overlapped motion compensation"-tool (OBMC) is employed? Due to the profile overview in the standard it's never used. In some requirement document I found it was proposed for Main profile. thanks beforehand axel ===================================================== Axel Binder Philips Starnberg Development Manager Software Petersbrunner Str. 17 D-82319 Starnberg phone: +49 8151 270 108 Germany fax: +49 8151 270 200 mobile: +49 172 92 18 623 e-mail: axel.binder@philips.com ===================================================== From fp lx.it.pt Tue Jul 10 18:04:21 2001 From: fp lx.it.pt (Fernando Pereira) Date: Wed Jul 30 14:06:35 2003 Subject: [M4IF Technotes] OBMC, for which visual profile References: Message-ID: <3B4B2785.87B58316@lx.it.pt> Hi ! axel.binder@philips.com wrote: > > Hi, > > can anybody tell me for which visual profiles the > "overlapped motion compensation"-tool (OBMC) is employed? > > Due to the profile overview in the standard it's never > used. In some requirement document I found it was proposed for > Main profile. Until now, the OBMC has not been include in any visual object type and consequently in no visual profile. Regards Fernando -- Fernando Manuel Bernardo Pereira, Ph.D., Professor Instituto Superior T?cnico - Instituto de Telecomunica??es Av. Rovisco Pais, 1049-001 Lisboa, PORTUGAL Phone: + 351 21 8418460 Fax: + 351 21 8418472 E-mail: Fernando.Pereira@lx.it.pt WWW: http://www.img.lx.it.pt/~fp/ From hagai enquad.com Tue Jul 10 20:33:52 2001 From: hagai enquad.com (Hagai Folkman) Date: Wed Jul 30 14:06:35 2003 Subject: [M4IF Technotes] GMC supported at core-profile ? Message-ID: <037301c10966$7d077740$0601a8c0@HAGAI> Hi, can anybody tell me if core-profile support Global Motion Compensation (GMC) tool ? I know that Advanced Simple Profile support this tool. thanks, hagai -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20010710/ddcf4ab9/attachment.html From rkoenen intertrust.com Tue Jul 10 10:38:44 2001 From: rkoenen intertrust.com (Rob Koenen) Date: Wed Jul 30 14:06:35 2003 Subject: [M4IF Technotes] GMC supported at core-profile ? Message-ID: <720AE932C238D411B4D100C04F10DA6B02DEB9DF@exchange.epr.com> It is not in Core. It is in Advnaced Simple and Advanced Coding Efficiency (ACE) Rob -----Original Message----- From: Hagai Folkman [mailto:hagai@enquad.com] Sent: Tuesday, 10 July, 2001 10:34 To: tech notes M4IF Subject: [M4IF Technotes] GMC supported at core-profile ? Hi, can anybody tell me if core-profile support Global Motion Compensation (GMC) tool ? I know that Advanced Simple Profile support this tool. thanks, hagai -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20010710/7ea0db38/attachment.html From garysull microsoft.com Tue Jul 10 12:29:57 2001 From: garysull microsoft.com (Gary Sullivan) Date: Wed Jul 30 14:06:35 2003 Subject: [M4IF Technotes] OBMC, for which visual profile Message-ID: <0170DDAD0BADFA4CBEC3B55A0748DCCC040C17AD@red-msg-02.redmond.corp.microsoft.com> Axel, You're right. None of the MPEG-4 profiles use OBMC. That's unfortunate, because it's a good tool (although my opinion is biased). It's odd that some publications talk about OBMC as being a feature of MPEG-4. As things stand, it really isn't used in that standard. Best Regards, -Gary S. -----Original Message----- From: axel.binder@philips.com [mailto:axel.binder@philips.com] Sent: Tuesday, July 10, 2023 8:24 AM To: technotes@lists.m4if.org Subject: [M4IF Technotes] OBMC, for which visual profile Hi, can anybody tell me for which visual profiles the "overlapped motion compensation"-tool (OBMC) is employed? Due to the profile overview in the standard it's never used. In some requirement document I found it was proposed for Main profile. thanks beforehand axel ===================================================== Axel Binder Philips Starnberg Development Manager Software Petersbrunner Str. 17 D-82319 Starnberg phone: +49 8151 270 108 Germany fax: +49 8151 270 200 mobile: +49 172 92 18 623 e-mail: axel.binder@philips.com ===================================================== _______________________________________________ Technotes mailing list Technotes@lists.m4if.org http://lists.m4if.org/mailman/listinfo/technotes From peterh videospheres.com Tue Jul 10 16:04:24 2001 From: peterh videospheres.com (Peter Haighton) Date: Wed Jul 30 14:06:35 2003 Subject: [M4IF Technotes] OBMC, for which visual profile In-Reply-To: <0170DDAD0BADFA4CBEC3B55A0748DCCC040C17AD@red-msg-02.redmond.corp.microsoft.com> Message-ID: Hi All, Yes, OBMC is a strange thing. Since it is described quite well in the standard, it is kind of odd that it never got put into any profile. Its a tool with no home! Which leads to the question, should it be removed from the specification? Peter -- Peter Haighton VideoSpheres Inc. 329 March Road, Unit 109 Kanata, Ontario Canada, K2K 2E9 Tel: (613) 270-9646 x240 Fax: (613) 271-1896 email: peterh@VideoSpheres.com See http://www.m4if.org for the latest on MPEG-4 -----Original Message----- From: technotes-admin@lists.m4if.org [mailto:technotes-admin@lists.m4if.org]On Behalf Of Gary Sullivan Sent: Tuesday, July 10, 2023 2:30 PM To: axel.binder@philips.com; technotes@lists.m4if.org Subject: RE: [M4IF Technotes] OBMC, for which visual profile Axel, You're right. None of the MPEG-4 profiles use OBMC. That's unfortunate, because it's a good tool (although my opinion is biased). It's odd that some publications talk about OBMC as being a feature of MPEG-4. As things stand, it really isn't used in that standard. Best Regards, -Gary S. -----Original Message----- From: axel.binder@philips.com [mailto:axel.binder@philips.com] Sent: Tuesday, July 10, 2023 8:24 AM To: technotes@lists.m4if.org Subject: [M4IF Technotes] OBMC, for which visual profile Hi, can anybody tell me for which visual profiles the "overlapped motion compensation"-tool (OBMC) is employed? Due to the profile overview in the standard it's never used. In some requirement document I found it was proposed for Main profile. thanks beforehand axel ===================================================== Axel Binder Philips Starnberg Development Manager Software Petersbrunner Str. 17 D-82319 Starnberg phone: +49 8151 270 108 Germany fax: +49 8151 270 200 mobile: +49 172 92 18 623 e-mail: axel.binder@philips.com ===================================================== _______________________________________________ Technotes mailing list Technotes@lists.m4if.org http://lists.m4if.org/mailman/listinfo/technotes _______________________________________________ Technotes mailing list Technotes@lists.m4if.org http://lists.m4if.org/mailman/listinfo/technotes From rkoenen intertrust.com Tue Jul 10 13:18:04 2001 From: rkoenen intertrust.com (Rob Koenen) Date: Wed Jul 30 14:06:35 2003 Subject: [M4IF Technotes] OBMC, for which visual profile Message-ID: <720AE932C238D411B4D100C04F10DA6B02DEBA05@exchange.epr.com> > Yes, OBMC is a strange thing. Since it is described quite well in the > standard, it is kind of odd that it never got put into any > profile. Its a > tool with no home! Which leads to the question, should it be > removed from > the specification? M4If is kind of a funny place to discuss this, but the answer is, it *could* theoretically be removed, but IF AND ONLY IF you are sure it will never be used in any future profile. I see no harm in letting it sit there. Rob From garysull microsoft.com Tue Jul 10 13:25:52 2001 From: garysull microsoft.com (Gary Sullivan) Date: Wed Jul 30 14:06:36 2003 Subject: [M4IF Technotes] OBMC, for which visual profile Message-ID: <0170DDAD0BADFA4CBEC3B55A0748DCCC040EF302@red-msg-02.redmond.corp.microsoft.com> Personally, I don't think we should try to remove OBMC from MPEG-4. It takes a lot of work to remove things, and it's possible to introduce errors in the process. And the position of OBMC in the spec isn't really a problem -- it's just an oddity. It's just an opportunity that was passed by -- a useful tool that hasn't yet been used (at least not in MPEG-4). I believe there have been other examples of such things, although I can't think of others in MPEG standards at the moment. There's always the chance it could get picked up in some yet-to-be-defined future profile. Best Regards, -Gary -----Original Message----- From: Peter Haighton [mailto:peterh@videospheres.com] Sent: Tuesday, July 10, 2023 12:04 PM To: Gary Sullivan; axel.binder@philips.com; technotes@lists.m4if.org Subject: RE: [M4IF Technotes] OBMC, for which visual profile Hi All, Yes, OBMC is a strange thing. Since it is described quite well in the standard, it is kind of odd that it never got put into any profile. Its a tool with no home! Which leads to the question, should it be removed from the specification? Peter -- Peter Haighton VideoSpheres Inc. 329 March Road, Unit 109 Kanata, Ontario Canada, K2K 2E9 Tel: (613) 270-9646 x240 Fax: (613) 271-1896 email: peterh@VideoSpheres.com See http://www.m4if.org for the latest on MPEG-4 -----Original Message----- From: technotes-admin@lists.m4if.org [mailto:technotes-admin@lists.m4if.org]On Behalf Of Gary Sullivan Sent: Tuesday, July 10, 2023 2:30 PM To: axel.binder@philips.com; technotes@lists.m4if.org Subject: RE: [M4IF Technotes] OBMC, for which visual profile Axel, You're right. None of the MPEG-4 profiles use OBMC. That's unfortunate, because it's a good tool (although my opinion is biased). It's odd that some publications talk about OBMC as being a feature of MPEG-4. As things stand, it really isn't used in that standard. Best Regards, -Gary S. -----Original Message----- From: axel.binder@philips.com [mailto:axel.binder@philips.com] Sent: Tuesday, July 10, 2023 8:24 AM To: technotes@lists.m4if.org Subject: [M4IF Technotes] OBMC, for which visual profile Hi, can anybody tell me for which visual profiles the "overlapped motion compensation"-tool (OBMC) is employed? Due to the profile overview in the standard it's never used. In some requirement document I found it was proposed for Main profile. thanks beforehand axel ===================================================== Axel Binder Philips Starnberg Development Manager Software Petersbrunner Str. 17 D-82319 Starnberg phone: +49 8151 270 108 Germany fax: +49 8151 270 200 mobile: +49 172 92 18 623 e-mail: axel.binder@philips.com ===================================================== _______________________________________________ Technotes mailing list Technotes@lists.m4if.org http://lists.m4if.org/mailman/listinfo/technotes _______________________________________________ Technotes mailing list Technotes@lists.m4if.org http://lists.m4if.org/mailman/listinfo/technotes From peterh videospheres.com Tue Jul 10 16:51:20 2001 From: peterh videospheres.com (Peter Haighton) Date: Wed Jul 30 14:06:36 2003 Subject: [M4IF Technotes] OBMC, for which visual profile In-Reply-To: <0170DDAD0BADFA4CBEC3B55A0748DCCC040EF302@red-msg-02.redmond.corp.microsoft.com> Message-ID: Hi Gary, Actually, I agree, I just thought that I would raise the question as food for thought. I am constantly having to correct people (magazines) because of confusion with MPEG-4, and this is just something that adds more confusion on top. Peter -----Original Message----- From: Gary Sullivan [mailto:garysull@microsoft.com] Sent: Tuesday, July 10, 2023 3:26 PM To: Peter Haighton; axel.binder@philips.com; technotes@lists.m4if.org Subject: RE: [M4IF Technotes] OBMC, for which visual profile Personally, I don't think we should try to remove OBMC from MPEG-4. It takes a lot of work to remove things, and it's possible to introduce errors in the process. And the position of OBMC in the spec isn't really a problem -- it's just an oddity. It's just an opportunity that was passed by -- a useful tool that hasn't yet been used (at least not in MPEG-4). I believe there have been other examples of such things, although I can't think of others in MPEG standards at the moment. There's always the chance it could get picked up in some yet-to-be-defined future profile. Best Regards, -Gary -----Original Message----- From: Peter Haighton [mailto:peterh@videospheres.com] Sent: Tuesday, July 10, 2023 12:04 PM To: Gary Sullivan; axel.binder@philips.com; technotes@lists.m4if.org Subject: RE: [M4IF Technotes] OBMC, for which visual profile Hi All, Yes, OBMC is a strange thing. Since it is described quite well in the standard, it is kind of odd that it never got put into any profile. Its a tool with no home! Which leads to the question, should it be removed from the specification? Peter -- Peter Haighton VideoSpheres Inc. 329 March Road, Unit 109 Kanata, Ontario Canada, K2K 2E9 Tel: (613) 270-9646 x240 Fax: (613) 271-1896 email: peterh@VideoSpheres.com See http://www.m4if.org for the latest on MPEG-4 -----Original Message----- From: technotes-admin@lists.m4if.org [mailto:technotes-admin@lists.m4if.org]On Behalf Of Gary Sullivan Sent: Tuesday, July 10, 2023 2:30 PM To: axel.binder@philips.com; technotes@lists.m4if.org Subject: RE: [M4IF Technotes] OBMC, for which visual profile Axel, You're right. None of the MPEG-4 profiles use OBMC. That's unfortunate, because it's a good tool (although my opinion is biased). It's odd that some publications talk about OBMC as being a feature of MPEG-4. As things stand, it really isn't used in that standard. Best Regards, -Gary S. -----Original Message----- From: axel.binder@philips.com [mailto:axel.binder@philips.com] Sent: Tuesday, July 10, 2023 8:24 AM To: technotes@lists.m4if.org Subject: [M4IF Technotes] OBMC, for which visual profile Hi, can anybody tell me for which visual profiles the "overlapped motion compensation"-tool (OBMC) is employed? Due to the profile overview in the standard it's never used. In some requirement document I found it was proposed for Main profile. thanks beforehand axel ===================================================== Axel Binder Philips Starnberg Development Manager Software Petersbrunner Str. 17 D-82319 Starnberg phone: +49 8151 270 108 Germany fax: +49 8151 270 200 mobile: +49 172 92 18 623 e-mail: axel.binder@philips.com ===================================================== _______________________________________________ Technotes mailing list Technotes@lists.m4if.org http://lists.m4if.org/mailman/listinfo/technotes _______________________________________________ Technotes mailing list Technotes@lists.m4if.org http://lists.m4if.org/mailman/listinfo/technotes From garysull microsoft.com Tue Jul 10 15:03:33 2001 From: garysull microsoft.com (Gary Sullivan) Date: Wed Jul 30 14:06:36 2003 Subject: [M4IF Technotes] Ac prediction Message-ID: <0170DDAD0BADFA4CBEC3B55A0748DCCC040EF305@red-msg-02.redmond.corp.microsoft.com> I've added this to an issues list that I'm submitting to the Sydney meeting. In the future, please try to make sure any such problems in the visual standard get my attention (and ultimately MPEG's attention). I came close to not noticing this reflector discussion. Best Regards, Gary Sullivan -----Original Message----- From: Jani Huoponen [mailto:Jani.Huoponen@hantro.com] Sent: Monday, June 25, 2023 10:22 PM To: Herpel Carsten; technotes@lists.m4if.org Subject: RE: [M4IF Technotes] Ac prediction Hi, Actually, this issue is not ambigous in the Visual standard, it does not say that you should treat inter blocks any differently from intra blocks. However, the video verification model document describes it other way, i.e., inter blocks should be treated as blocks outside of VOP or video packet (as Ramkishor says below). This interpretation seems to be quite common and if this is the way to do it then there should be a Corrigendum for it. Otherwise the Video Verification Model doc should be corrected to match the actual Visual standard. Which way to go? br, Jani > -----Original Message----- > From: Herpel Carsten [mailto:HerpelC@thmulti.com] > Sent: 11. kes?kuuta 2001 17:01 > To: technotes@lists.m4if.org > Subject: RE: [M4IF Technotes] Ac prediction > > > The issue is: If this cannot be read unambiguously from the spec, a > Corrigendum should be made to remove this ambiguity. > > Is it ambiguous from the written spec? > > Regards, > Carsten > +-----------------------------------------------------------+ > | THOMSON multimedia -------------------------- CR Hannover | > +-----------------------------------------------------------+ > | Carsten Herpel | > | Deutsche Thomson-Brandt GmbH | > | Karl-Wiechert-Allee 74 Tel.: +49 511 418 2510 | > | 30625 Hannover Fax.: +49 511 418 2483 | > | Germany mailto:herpelc@thmulti.com | > +-----------------------------------------------------------+ > > > > -----Original Message----- > From: Ramkishor Korada [mailto:ramki@emuzed.com] > Sent: 11 June, 2001 14:21 > To: Jani Huoponen; technotes@lists.m4if.org > Subject: Re: [M4IF Technotes] Ac prediction > > > Hi, > When the block is not Intra (Inter), then they should be > handled the same > way as blocks outside VOP or packet i.e., use zero values as > predictors. > > warm regards, > ramkishor > > Architect - Video > Digital Media Technology Division > Emuzed Bangalore Division > IndiraNagar,Bangalore > www.emuzed.com > > ----- Original Message ----- > From: "Jani Huoponen" > To: > Sent: Monday, June 11, 2023 9:48 AM > Subject: [M4IF Technotes] Ac prediction > > > > Hi all, > > > > There seems to be one vague point in the Visual standard > regarding the AC > > prediction, I would like to have your opinion on the > interpretation of the > > standard. > > > > So the question is: > > > > What values are supposed to use in ac prediction if type of > the prediction > > block (block 'A' or block 'C') is not intra? Standard does > not seem to > > impose any restrictions on usage of inter blocks as ac > predictor blocks > but > > video verification model seems to specify that they should > be handled the > > same way as blocks outside the VOP or video packet (i.e. > use zero values > as > > predictors instead of actual inter block ac coefficient values). > > > > BR, Jani > > > > ------------------------------------------------------------ > > Jani Huoponen > > Engineering Manager, System Design > > Hantro Products Oy > > Nahkatehtaankatu 2, 90100 Oulu, Finland > > +358-40-5272676 > > ------------------------------------------------------------ > > > > _______________________________________________ > > Technotes mailing list > > Technotes@lists.m4if.org > > http://lists.m4if.org/mailman/listinfo/technotes > > > > _______________________________________________ > Technotes mailing list > Technotes@lists.m4if.org > http://lists.m4if.org/mailman/listinfo/technotes > _______________________________________________ > Technotes mailing list > Technotes@lists.m4if.org > http://lists.m4if.org/mailman/listinfo/technotes > _______________________________________________ Technotes mailing list Technotes@lists.m4if.org http://lists.m4if.org/mailman/listinfo/technotes From richard sorenson.com Wed Jul 11 11:30:37 2001 From: richard sorenson.com (Richard Shields) Date: Wed Jul 30 14:06:36 2003 Subject: [M4IF Technotes] File Format Version indication? Message-ID: <43D8F7C6A2AFD411969D00508BCFA06B4C0D8C@smi-mail.sorenson.com> Is there any information in the file format that indicates what version of 14496-1 it complies with? Thanks, Richard From chris avipix.com Wed Jul 11 13:59:25 2001 From: chris avipix.com (Christopher Wendt) Date: Wed Jul 30 14:06:36 2003 Subject: [M4IF Technotes] File Format Version indication? References: <43D8F7C6A2AFD411969D00508BCFA06B4C0D8C@smi-mail.sorenson.com> Message-ID: <005d01c10a2a$d72a6ab0$0f01000a@cw> Hi Richard, all, Right now, there is only one version, although version 2 is on it's way. A common problem is the updating of files to correct for the changes in COR1 to the old spec. Is that what you mean? -Chris ------------------------------------------------------------- Christopher Wendt, avipix, llc chris@avipix.com (732) 682-5549 http://www.avipix.com ----- Original Message ----- From: "Richard Shields" To: Sent: Wednesday, July 11, 2023 12:30 PM Subject: [M4IF Technotes] File Format Version indication? > Is there any information in the file format that indicates what version of > 14496-1 it complies with? > > Thanks, > Richard > > _______________________________________________ > Technotes mailing list > Technotes@lists.m4if.org > http://lists.m4if.org/mailman/listinfo/technotes > From richard sorenson.com Wed Jul 11 12:24:20 2001 From: richard sorenson.com (Richard Shields) Date: Wed Jul 30 14:06:36 2003 Subject: [M4IF Technotes] File Format Version indication? Message-ID: <43D8F7C6A2AFD411969D00508BCFA06B4C0DA2@smi-mail.sorenson.com> Hi Chris, all, Well, my question was prompted by a question to me about 'ftyp'. 'ftyp' seems to be the information I'm looking for: an indicator that signals which version the file conforms to. Is that the correct understanding for it's use? Just to make sure I thought I would check to see if there wasn't anything else in the file that signaled the version. The document titled "MP4 version 2 (systems amendment 3) working draft" (w3850.doc) indicates that 'ftyp' is mandatory. Shouldn't it state that it's optional? If it's not there then a player should assume version 1 otherwise consider the version indicated in the 'ftyp' atom. Would that be appropriate behavior? -Richard > -----Original Message----- > From: Christopher Wendt [mailto:chris@avipix.com] > Sent: Wednesday, July 11, 2023 10:59 AM > To: Richard Shields; technotes@lists.m4if.org > Subject: Re: [M4IF Technotes] File Format Version indication? > > > Hi Richard, all, > > Right now, there is only one version, although version 2 is > on it's way. A > common problem is the updating of files to correct for the > changes in COR1 > to the old spec. Is that what you mean? > > -Chris > > ------------------------------------------------------------- > Christopher Wendt, avipix, llc > chris@avipix.com > (732) 682-5549 > http://www.avipix.com > > ----- Original Message ----- > From: "Richard Shields" > To: > Sent: Wednesday, July 11, 2023 12:30 PM > Subject: [M4IF Technotes] File Format Version indication? > > > > Is there any information in the file format that indicates > what version of > > 14496-1 it complies with? > > > > Thanks, > > Richard > > > > _______________________________________________ > > Technotes mailing list > > Technotes@lists.m4if.org > > http://lists.m4if.org/mailman/listinfo/technotes > > > From chris avipix.com Wed Jul 11 14:28:16 2001 From: chris avipix.com (Christopher Wendt) Date: Wed Jul 30 14:06:36 2003 Subject: [M4IF Technotes] File Format Version indication? References: <43D8F7C6A2AFD411969D00508BCFA06B4C0DA2@smi-mail.sorenson.com> Message-ID: <007101c10a2e$df53d0b0$0f01000a@cw> Hi Richard, all, Right, ftyp is mandatory for v2, a file without ftyp is by default v1. -Chris ----- Original Message ----- From: "Richard Shields" To: "Christopher Wendt" ; Sent: Wednesday, July 11, 2023 1:24 PM Subject: RE: [M4IF Technotes] File Format Version indication? > Hi Chris, all, > > Well, my question was prompted by a question to me about 'ftyp'. 'ftyp' > seems to be the information I'm looking for: an indicator that signals which > version the file conforms to. Is that the correct understanding for it's > use? Just to make sure I thought I would check to see if there wasn't > anything else in the file that signaled the version. > > The document titled "MP4 version 2 (systems amendment 3) working draft" > (w3850.doc) indicates that 'ftyp' is mandatory. Shouldn't it state that > it's optional? If it's not there then a player should assume version 1 > otherwise consider the version indicated in the 'ftyp' atom. Would that be > appropriate behavior? > > -Richard > > > -----Original Message----- > > From: Christopher Wendt [mailto:chris@avipix.com] > > Sent: Wednesday, July 11, 2023 10:59 AM > > To: Richard Shields; technotes@lists.m4if.org > > Subject: Re: [M4IF Technotes] File Format Version indication? > > > > > > Hi Richard, all, > > > > Right now, there is only one version, although version 2 is > > on it's way. A > > common problem is the updating of files to correct for the > > changes in COR1 > > to the old spec. Is that what you mean? > > > > -Chris > > > > ------------------------------------------------------------- > > Christopher Wendt, avipix, llc > > chris@avipix.com > > (732) 682-5549 > > http://www.avipix.com > > > > ----- Original Message ----- > > From: "Richard Shields" > > To: > > Sent: Wednesday, July 11, 2023 12:30 PM > > Subject: [M4IF Technotes] File Format Version indication? > > > > > > > Is there any information in the file format that indicates > > what version of > > > 14496-1 it complies with? > > > > > > Thanks, > > > Richard > > > > > > _______________________________________________ > > > Technotes mailing list > > > Technotes@lists.m4if.org > > > http://lists.m4if.org/mailman/listinfo/technotes > > > > > > From richard sorenson.com Wed Jul 11 12:47:37 2001 From: richard sorenson.com (Richard Shields) Date: Wed Jul 30 14:06:36 2003 Subject: [M4IF Technotes] File Format Version indication? Message-ID: <43D8F7C6A2AFD411969D00508BCFA06B4C0DAE@smi-mail.sorenson.com> Chris, Thanks for making this clear. -Richard > -----Original Message----- > From: Christopher Wendt [mailto:chris@avipix.com] > Sent: Wednesday, July 11, 2023 11:28 AM > To: Richard Shields; technotes@lists.m4if.org > Subject: Re: [M4IF Technotes] File Format Version indication? > > > Hi Richard, all, > > Right, ftyp is mandatory for v2, a file without ftyp is by > default v1. > > -Chris > > ----- Original Message ----- > From: "Richard Shields" > To: "Christopher Wendt" ; > Sent: Wednesday, July 11, 2023 1:24 PM > Subject: RE: [M4IF Technotes] File Format Version indication? > > > > Hi Chris, all, > > > > Well, my question was prompted by a question to me about > 'ftyp'. 'ftyp' > > seems to be the information I'm looking for: an indicator > that signals > which > > version the file conforms to. Is that the correct > understanding for it's > > use? Just to make sure I thought I would check to see if > there wasn't > > anything else in the file that signaled the version. > > > > The document titled "MP4 version 2 (systems amendment 3) > working draft" > > (w3850.doc) indicates that 'ftyp' is mandatory. Shouldn't > it state that > > it's optional? If it's not there then a player should > assume version 1 > > otherwise consider the version indicated in the 'ftyp' > atom. Would that > be > > appropriate behavior? > > > > -Richard > > > > > -----Original Message----- > > > From: Christopher Wendt [mailto:chris@avipix.com] > > > Sent: Wednesday, July 11, 2023 10:59 AM > > > To: Richard Shields; technotes@lists.m4if.org > > > Subject: Re: [M4IF Technotes] File Format Version indication? > > > > > > > > > Hi Richard, all, > > > > > > Right now, there is only one version, although version 2 is > > > on it's way. A > > > common problem is the updating of files to correct for the > > > changes in COR1 > > > to the old spec. Is that what you mean? > > > > > > -Chris > > > > > > ------------------------------------------------------------- > > > Christopher Wendt, avipix, llc > > > chris@avipix.com > > > (732) 682-5549 > > > http://www.avipix.com > > > > > > ----- Original Message ----- > > > From: "Richard Shields" > > > To: > > > Sent: Wednesday, July 11, 2023 12:30 PM > > > Subject: [M4IF Technotes] File Format Version indication? > > > > > > > > > > Is there any information in the file format that indicates > > > what version of > > > > 14496-1 it complies with? > > > > > > > > Thanks, > > > > Richard > > > > > > > > _______________________________________________ > > > > Technotes mailing list > > > > Technotes@lists.m4if.org > > > > http://lists.m4if.org/mailman/listinfo/technotes > > > > > > > > > > From LMing tvia.com Fri Jul 13 11:36:28 2001 From: LMing tvia.com (Lei Ming) Date: Wed Jul 30 14:06:36 2003 Subject: [M4IF Technotes] Is interlaced in simple profile? Message-ID: Hi, all, Is interlaced in simple profile or only in main profile? Lei ---------------------------------- Lei Ming Tvia Inc. (408)982-8588 ext. 162 From akelly gmvnetwork.com Fri Jul 13 14:58:21 2001 From: akelly gmvnetwork.com (Adam Kelly) Date: Wed Jul 30 14:06:36 2003 Subject: [M4IF Technotes] Re: Is interlaced in simple profile? References: Message-ID: <3B4F44CD.2E5DC181@gmvnetwork.com> Hi Lei, Section 7.7 of ISO/IEC 14496-2:1999(E), nor Annex N specify this, but if you look at section 6.2.5 (Video Object Plane), it seems that the interlaced bit is only checked if video_object_layer_shape != "binary only". video_object_layer_shape is a 2 bit integer (see table 6-14) So, to put all that in english, it appears that interlaced is valid/possible at any layer and profile that you have encountered a VOP in, IF the VOL is of shape type "rectangular", "binary" or "grayscale" Hope this helps, Adam From chris avipix.com Fri Jul 13 16:20:12 2001 From: chris avipix.com (Christopher Wendt) Date: Wed Jul 30 14:06:36 2003 Subject: [M4IF Technotes] Is interlaced in simple profile? References: Message-ID: <029a01c10bd0$d73ff2c0$0f01000a@cw> Hi Lei, all, Interlaced video is in Advanced Simple Profile, not Simple Profile. -Chris ------------------------------------------------------------- Christopher Wendt, avipix, llc chris@avipix.com (732) 682-5549 http://www.avipix.com ----- Original Message ----- From: "Lei Ming" To: Sent: Friday, July 13, 2023 1:36 PM Subject: [M4IF Technotes] Is interlaced in simple profile? > Hi, all, > > Is interlaced in simple profile or only in main profile? > > Lei > ---------------------------------- > Lei Ming > Tvia Inc. > (408)982-8588 ext. 162 > > _______________________________________________ > Technotes mailing list > Technotes@lists.m4if.org > http://lists.m4if.org/mailman/listinfo/technotes > From chris avipix.com Fri Jul 13 16:43:44 2001 From: chris avipix.com (Christopher Wendt) Date: Wed Jul 30 14:06:36 2003 Subject: [M4IF Technotes] Is interlaced in simple profile? References: Message-ID: <041701c10bd4$2074c3a0$0f01000a@cw> Hi Lei, all, I spoke to quickly :), it's only in Main profile, Advanced Simple isn't currently an MPEG profile. Refer to Section 9.2 in the spec. Sorry about the confusion. -Chris ------------------------------------------------------------- Christopher Wendt, avipix, llc chris@avipix.com (732) 682-5549 http://www.avipix.com ----- Original Message ----- From: "Lei Ming" To: Sent: Friday, July 13, 2023 1:36 PM Subject: [M4IF Technotes] Is interlaced in simple profile? > Hi, all, > > Is interlaced in simple profile or only in main profile? > > Lei > ---------------------------------- > Lei Ming > Tvia Inc. > (408)982-8588 ext. 162 > > _______________________________________________ > Technotes mailing list > Technotes@lists.m4if.org > http://lists.m4if.org/mailman/listinfo/technotes > From rkoenen intertrust.com Fri Jul 13 18:54:49 2001 From: rkoenen intertrust.com (Rob Koenen) Date: Wed Jul 30 14:06:37 2003 Subject: [M4IF Technotes] Is interlaced in simple profile? Message-ID: <720AE932C238D411B4D100C04F10DA6B0398A249@exchange.epr.com> In Advanced Simple only from Level 4 upwards. It is in Main and Advanced Coding Efficiency Profiles. Usage of Interlaced tool is restricted by Profiles (and in exceptional cases, such as Advanced Simple) by the Level. Rob > -----Original Message----- > From: Christopher Wendt [mailto:chris@avipix.com] > Sent: Friday, 13 July, 2001 12:20 > To: Lei Ming; technotes@lists.m4if.org > Subject: Re: [M4IF Technotes] Is interlaced in simple profile? > > > Hi Lei, all, > > Interlaced video is in Advanced Simple Profile, not Simple Profile. > > -Chris > > ------------------------------------------------------------- > Christopher Wendt, avipix, llc > chris@avipix.com > (732) 682-5549 > http://www.avipix.com > > ----- Original Message ----- > From: "Lei Ming" > To: > Sent: Friday, July 13, 2023 1:36 PM > Subject: [M4IF Technotes] Is interlaced in simple profile? > > > > Hi, all, > > > > Is interlaced in simple profile or only in main profile? > > > > Lei > > ---------------------------------- > > Lei Ming > > Tvia Inc. > > (408)982-8588 ext. 162 > > > > _______________________________________________ > > Technotes mailing list > > Technotes@lists.m4if.org > > http://lists.m4if.org/mailman/listinfo/technotes > > > > _______________________________________________ > Technotes mailing list > Technotes@lists.m4if.org > http://lists.m4if.org/mailman/listinfo/technotes > From rkoenen intertrust.com Fri Jul 13 18:59:20 2001 From: rkoenen intertrust.com (Rob Koenen) Date: Wed Jul 30 14:06:37 2003 Subject: [M4IF Technotes] Is interlaced in simple profile? Message-ID: <720AE932C238D411B4D100C04F10DA6B0398A24E@exchange.epr.com> > I spoke to quickly :), it's only in Main profile, Advanced > Simple isn't > currently an MPEG profile. You speak too quickly only now. Advanced Simple IS an MPEG Profile. It has been approved and gone through all the necessary ballots and everything. Rob From fakl gmx.de Mon Jul 16 16:45:21 2001 From: fakl gmx.de (Falk Dobermann) Date: Wed Jul 30 14:06:37 2003 Subject: [M4IF Technotes] ServerCommand Node Message-ID: <001901c10dfd$93e61160$9faa66c0@rostock.igd.fhg.de> Skipped content of type multipart/alternative-------------- next part -------------- A non-text attachment was scrubbed... Name: smime.p7s Type: application/x-pkcs7-signature Size: 2261 bytes Desc: not available Url : /pipermail/mp4-tech/attachments/20010716/3ec0231e/smime.bin From richard sorenson.com Wed Jul 18 10:49:30 2001 From: richard sorenson.com (Richard Shields) Date: Wed Jul 30 14:06:37 2003 Subject: [M4IF Technotes] Sub-part of a presentation Message-ID: <43D8F7C6A2AFD411969D00508BCFA06B4C10BA@smi-mail.sorenson.com> Section 13.2.3.4 of 14496-1 mentions that a file that contains an IOD in the esds atom but no BIFS track is a sub-part of a presentation. Given that, is it possible to create a file that is a sub-part of a presentation where the file contains both video and audio streams? Since the IOD cannot include a video stream and an audio stream because of section 8.7.1.2 one would need to create an OD stream to create objects for each media type. But, 8.7.1.4 indicates that an OD cannot contain an OD stream without a BIFS stream. So, if you include an BIFS stream in the IOD to comply with 8.7.1.4 then it is no longer a sub-part of a presentation. Am I misinterpreting the specifications? Other related questions: Can an iods atom contain multiple OD's? 13.2.3.4 seems to indicate that it can only contain one. Can an iods atom contain OD commands? Is it valid to have an IOD that doesn't refer to any elementary streams? I have seen this in some .mp4 files but it does not seem to follow 8.6.4. Thanks, Richard From miyao crystal.cirrus.com Thu Jul 19 19:52:38 2001 From: miyao crystal.cirrus.com (Yao, Michael) Date: Wed Jul 30 14:06:37 2003 Subject: [M4IF Technotes] Help Needed in MPEG4 Reference Software--Systems Message-ID: Hi, 1. I couldn't get 2-D player by building Player2d\2DPlayer-CSELT\IM1-2D.dsw 2. when playing with 3-D player, I got "Debug Assertion Failed" window. Anybody helps me? Thanks. Michael From tao.xie vialta-inc.com Mon Jul 23 16:37:26 2001 From: tao.xie vialta-inc.com (tao.xie@vialta-inc.com) Date: Wed Jul 30 14:06:37 2003 Subject: [M4IF Technotes] Help Needed in MPEG4 Reference Message-ID: Hi, I have the floating-point ISO VM test code for HVXC. But I am looking for a fixed-point implementation. Could anyone help me please? Thanks. Tao From rkoenen intertrust.com Tue Jul 24 11:25:15 2001 From: rkoenen intertrust.com (Rob Koenen) Date: Wed Jul 30 14:06:37 2003 Subject: [M4IF Technotes] Help Needed in MPEG4 Reference Message-ID: <720AE932C238D411B4D100C04F10DA6B02DEBAC7@exchange.epr.com> I do not know of such (reference) SW. Schuyler, do you? Rob > -----Original Message----- > From: tao.xie@vialta-inc.com [mailto:tao.xie@vialta-inc.com] > Sent: Monday, 23 July, 2001 15:37 > To: technotes@lists.m4if.org > Subject: [M4IF Technotes] Help Needed in MPEG4 Reference > > > Hi, > > I have the floating-point ISO VM test code for HVXC. > But I am looking for a fixed-point implementation. > Could anyone help me please? > > Thanks. > > Tao > > _______________________________________________ > Technotes mailing list > Technotes@lists.m4if.org > http://lists.m4if.org/mailman/listinfo/technotes > From srq research.att.com Tue Jul 24 17:35:39 2001 From: srq research.att.com (Schuyler Quackenbush) Date: Wed Jul 30 14:06:37 2003 Subject: [M4IF Technotes] Help Needed in MPEG4 Reference References: <720AE932C238D411B4D100C04F10DA6B02DEBAC7@exchange.epr.com> Message-ID: <3B5DDC1B.A7FE8EA3@research.att.com> I will forward this message to people in the MPEG Audio group that should know if such fixed-point code exists. Schuyler -- Schuyler Quackenbush Principal Technical Staff Member Phone: (973) 360-8551 AT&T Labs, Rm E133 FAX: (973) 360-7111 180 Park Avenue, Bldg. 103 Email: srq@research.att.com Florham Park, NJ 07932, USA http://www.research.att.com/info/srq Chair, MPEG Audio Subgroup Rob Koenen wrote: > > I do not know of such (reference) SW. > Schuyler, do you? > > Rob > > > -----Original Message----- > > From: tao.xie@vialta-inc.com [mailto:tao.xie@vialta-inc.com] > > Sent: Monday, 23 July, 2001 15:37 > > To: technotes@lists.m4if.org > > Subject: [M4IF Technotes] Help Needed in MPEG4 Reference > > > > > > Hi, > > > > I have the floating-point ISO VM test code for HVXC. > > But I am looking for a fixed-point implementation. > > Could anyone help me please? > > > > Thanks. > > > > Tao > > > > _______________________________________________ > > Technotes mailing list > > Technotes@lists.m4if.org > > http://lists.m4if.org/mailman/listinfo/technotes > > From tao.xie vialta-inc.com Tue Jul 24 18:29:31 2001 From: tao.xie vialta-inc.com (tao.xie@vialta-inc.com) Date: Wed Jul 30 14:06:37 2003 Subject: [M4IF Technotes] Help Needed in MPEG4 Reference Message-ID: Thank you all! Tao > -----Original Message----- > From: Schuyler Quackenbush [SMTP:srq@research.att.com] > Sent: Tuesday, July 24, 2023 1:36 PM > To: Rob Koenen > Cc: 'tao.xie@vialta-inc.com'; technotes@lists.m4if.org > Subject: Re: [M4IF Technotes] Help Needed in MPEG4 Reference > > I will forward this message to people in the MPEG Audio group that should > know > if such fixed-point code exists. > Schuyler > -- > Schuyler Quackenbush > Principal Technical Staff Member Phone: (973) 360-8551 > AT&T Labs, Rm E133 FAX: (973) 360-7111 > 180 Park Avenue, Bldg. 103 Email: srq@research.att.com > Florham Park, NJ 07932, USA http://www.research.att.com/info/srq > Chair, MPEG Audio Subgroup > > > Rob Koenen wrote: > > > > I do not know of such (reference) SW. > > Schuyler, do you? > > > > Rob > > > > > -----Original Message----- > > > From: tao.xie@vialta-inc.com [mailto:tao.xie@vialta-inc.com] > > > Sent: Monday, 23 July, 2001 15:37 > > > To: technotes@lists.m4if.org > > > Subject: [M4IF Technotes] Help Needed in MPEG4 Reference > > > > > > > > > Hi, > > > > > > I have the floating-point ISO VM test code for HVXC. > > > But I am looking for a fixed-point implementation. > > > Could anyone help me please? > > > > > > Thanks. > > > > > > Tao > > > > > > _______________________________________________ > > > Technotes mailing list > > > Technotes@lists.m4if.org > > > http://lists.m4if.org/mailman/listinfo/technotes > > > From Deepak.Raina lntinfotech.com Wed Jul 25 12:17:54 2001 From: Deepak.Raina lntinfotech.com (Deepak.Raina@lntinfotech.com) Date: Wed Jul 30 14:06:37 2003 Subject: [M4IF Technotes] how mpeg-4 is transmitted over atm?? Message-ID: I want to get the details for mpeg-4 transmission over atm?? where can i get the information. Can any one suggest the web site or company who has worked for MPEG4 over ATM network. Regards Deepak From rkoenen intertrust.com Thu Jul 26 00:20:23 2001 From: rkoenen intertrust.com (Rob Koenen) Date: Wed Jul 30 14:06:37 2003 Subject: [M4IF Technotes] ServerCommand Node Message-ID: <720AE932C238D411B4D100C04F10DA6B03B96E2A@exchange.epr.com> I haven't seen an answer to this question yet. Olivier? Rob -----Original Message----- From: Falk Dobermann [mailto:fakl@gmx.de] Sent: Monday, 16 July, 2001 6:45 To: technotes@lists.m4if.org Subject: [M4IF Technotes] ServerCommand Node Where can I find information about the ServerCommand BIFS-node? What kind of data is transmited on the backchannel? Can I send the mouse coordinates using a PlaneSensor connected to a ServerCommand node or is it just for boolean events? Thank you, Falk -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20010725/b7242e17/attachment.html From chris avipix.com Thu Jul 26 07:52:53 2001 From: chris avipix.com (Christopher Wendt) Date: Wed Jul 30 14:06:37 2003 Subject: [M4IF Technotes] ServerCommand Node References: <720AE932C238D411B4D100C04F10DA6B03B96E2A@exchange.epr.com> Message-ID: <024d01c115c1$1f3939c0$0301000a@cw> Hi Falk, All, The ServerCommand Node is defined in ISO/IEC 14496-1:2000/FDAM 1 (w3724). A ServerCommand Node is triggered by a boolean event but transmits an SFString "command" You can use ServerCommand in a proprietary way and send the mouse coordinates in the command string, or off the top of my head, you may be able to use a Valuator Node to translate the coordinates of the Plane Sensor, but in that case you may need 3 ServerCommand Nodes for x, y, and z coordinates. Anyway, hope that helps. -Chris ------------------------------------------------------------- Christopher Wendt, avipix, llc chris@avipix.com (732) 682-5549 http://www.avipix.com ----- Original Message ----- From: Rob Koenen To: Falk Dobermann ; technotes@lists.m4if.org Cc: Olivier Avaro (E-mail 2) Sent: Thursday, July 26, 2023 2:20 AM Subject: RE: [M4IF Technotes] ServerCommand Node I haven't seen an answer to this question yet. Olivier? Rob -----Original Message----- From: Falk Dobermann [mailto:fakl@gmx.de] Sent: Monday, 16 July, 2001 6:45 To: technotes@lists.m4if.org Subject: [M4IF Technotes] ServerCommand Node Where can I find information about the ServerCommand BIFS-node? What kind of data is transmited on the backchannel? Can I send the mouse coordinates using a PlaneSensor connected to a ServerCommand node or is it just for boolean events? Thank you, Falk From fakl gmx.de Thu Jul 26 14:13:05 2001 From: fakl gmx.de (Falk Dobermann) Date: Wed Jul 30 14:06:37 2003 Subject: [M4IF Technotes] ServerCommand Node References: <720AE932C238D411B4D100C04F10DA6B03B96E2A@exchange.epr.com> <024d01c115c1$1f3939c0$0301000a@cw> Message-ID: <001e01c115c3$f1cffbb0$9faa66c0@rostock.igd.fhg.de> Yes. Thank you. ----- Original Message ----- From: "Christopher Wendt" To: "Rob Koenen" ; "Falk Dobermann" ; Cc: "Olivier Avaro (E-mail 2)" Sent: Thursday, July 26, 2023 12:52 PM Subject: Re: [M4IF Technotes] ServerCommand Node > Hi Falk, All, > > The ServerCommand Node is defined in ISO/IEC 14496-1:2000/FDAM 1 (w3724). > A ServerCommand Node is triggered by a boolean event but transmits an > SFString "command" > You can use ServerCommand in a proprietary way and send the mouse > coordinates in the command string, or > off the top of my head, you may be able to use a Valuator Node to translate > the coordinates of the Plane Sensor, but in that case you may need 3 > ServerCommand Nodes for x, y, and z coordinates. > > Anyway, hope that helps. > > -Chris > > ------------------------------------------------------------- > Christopher Wendt, avipix, llc > chris@avipix.com > (732) 682-5549 > http://www.avipix.com > > ----- Original Message ----- > From: Rob Koenen > To: Falk Dobermann ; technotes@lists.m4if.org > Cc: Olivier Avaro (E-mail 2) > Sent: Thursday, July 26, 2023 2:20 AM > Subject: RE: [M4IF Technotes] ServerCommand Node > > > I haven't seen an answer to this question yet. > Olivier? > > Rob > > -----Original Message----- > From: Falk Dobermann [mailto:fakl@gmx.de] > Sent: Monday, 16 July, 2001 6:45 > To: technotes@lists.m4if.org > Subject: [M4IF Technotes] ServerCommand Node > > > Where can I find information about the ServerCommand BIFS-node? What kind of > data is transmited on the backchannel? Can I send the mouse coordinates > using a PlaneSensor connected to a ServerCommand node or is it just for > boolean events? > > Thank you, > Falk > > _______________________________________________ > Technotes mailing list > Technotes@lists.m4if.org > http://lists.m4if.org/mailman/listinfo/technotes > > From TPletz EUROMONEYPLC.COM Thu Jul 26 13:30:14 2001 From: TPletz EUROMONEYPLC.COM (Pletz Tara) Date: Wed Jul 30 14:06:38 2003 Subject: [M4IF Technotes] (no subject) Message-ID: What does the approval of -AFX VM 3.0 -WD 3.0 of IPMP extension -CD of part 8 "4 on IP framework" mean to commercial companies ? Who will be positively affected by this and why? Tara Pletz Journalist/Researcher Broadcasting Strategies & Finance Week Techmedia, Euromoney Institutional Investor PLC Nestor House Playhouse Yard London, UK EC4 5EX Phone: +44 (0)20 7779 8466 Fax: +44 (0)20 7779 8492 E-mail: tpletz@euromoneyplc.com www.broadcastingstrategies.com DISCLAIMER: The information in this email is confidential. The contents may not be disclosed or used by anyone other than the addressee. If you are not the intended recipient(s), any use, disclosure, copying, distribution or any action taken or omitted to be taken in reliance on it is prohibited and may be unlawful. If you have received this communication in error please notify us by e-mail or by telephone on +44 (0) 20 7779 8888 and then delete the e-mail and all attachments and any copies thereof. Euromoney Institutional Investor PLC (and its subsidiaries) cannot accept responsibility for the accuracy or completeness of this email as it has been transmitted over a public network. If you suspect that the email may have been intercepted or amended, please call the sender. Any views expressed by an individual in this email do not necessarily reflect views of Euromoney Institutional Investor PLC (and its subsidiaries). This communication is from Euromoney Institutional Investor PLC, a company registered in England and Wales under company number 954730 with registered office at Nestor House, Playhouse Yard, London EC4V 5EX. -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20010726/42365acc/attachment.html From chris avipix.com Thu Jul 26 10:07:49 2001 From: chris avipix.com (Christopher Wendt) Date: Wed Jul 30 14:06:38 2003 Subject: [M4IF Technotes] Sub-part of a presentation References: <43D8F7C6A2AFD411969D00508BCFA06B4C10BA@smi-mail.sorenson.com> Message-ID: <027801c115d3$f8bd41c0$0301000a@cw> (I forgot to forward this to the rest of the list, sorry) Hi Richard, all, > Section 13.2.3.4 of 14496-1 mentions that a file that contains an IOD in the > esds atom but no BIFS track is a sub-part of a presentation. Given that, is > it possible to create a file that is a sub-part of a presentation where the > file contains both video and audio streams? Yes. > Since the IOD cannot include a > video stream and an audio stream because of section 8.7.1.2 one would need > to create an OD stream to create objects for each media type. But, 8.7.1.4 > indicates that an OD cannot contain an OD stream without a BIFS stream. So, > if you include an BIFS stream in the IOD to comply with 8.7.1.4 then it is > no longer a sub-part of a presentation. Am I misinterpreting the > specifications? You can have, for example, two (or more) mp4 files, one with an IOD containing the BIFS scene and the OD which references by URL the second (third, fourth,...) file (the "sub-part") containing the Video/Audio. > > Other related questions: > > Can an iods atom contain multiple OD's? 13.2.3.4 seems to indicate that it > can only contain one. In general, for a self contained presentation, an IOD should reference 1 BIFS and 1 OD stream. If you want to reference multiple OD streams (which would usually mean you are inlining multiple scenes) you would use a URL references. Look at 8.7.3 in 14496-1. > > Can an iods atom contain OD commands? Both IOD's and OD's are composed of OD commands, so yes of course. But for IOD you are only going to have 2 ODUpdates for the BIFS and OD. > > Is it valid to have an IOD that doesn't refer to any elementary streams? I > have seen this in some .mp4 files but it does not seem to follow 8.6.4. No, if the IOD doesn't refer to any ES's then there is nothing. -Chris ------------------------------------------------------------- Christopher Wendt, avipix, llc chris@avipix.com (732) 682-5549 http://www.avipix.com From richard sorenson.com Thu Jul 26 11:35:02 2001 From: richard sorenson.com (Richard Shields) Date: Wed Jul 30 14:06:38 2003 Subject: [M4IF Technotes] Sub-part of a presentation Message-ID: <43D8F7C6A2AFD411969D00508BCFA06B4C12B7@smi-mail.sorenson.com> Hi Chris, all, > You can have, for example, two (or more) mp4 files, one with an IOD > containing the BIFS scene and the OD which references by URL the second > (third, fourth,...) file (the "sub-part") containing the Video/Audio. So, the OD stream in the main file creates a video object and an audio object that both have url references to the same file that contain a video stream and an audio stream. But how would that file that contains the audio and video be constructed? Would it contain just the elementary streams for audio and video? It would have to contain an iods according to 13.2.3.4. And, according to 8.6.4.1 the IOD contained in the iods must refer to at least one stream but it cannot refer to both the audio and the video stream according to 8.7.1.2. So, how is it accomplished? > > > > Can an iods atom contain OD commands? > Both IOD's and OD's are composed of OD commands, so yes of > course. But for IOD you are only going to have 2 ODUpdates for the BIFS and OD. > 13.2.3.4 states that an iods contains *an* Object Descriptor or *an* Initial Object Descriptor. So, from that, I understand that the iods contains only one IOD or OD. You cannot string together a series of OD's in the iods like you can in an ObjectDescriptorUpdate command. Would anyone disagree with that statement? It would have been nice if you could string together all of your objects in the iods that would be in existance at time 0 so you would not have to have an OD stream. I don't agree with your statement that IOD's and OD's are composed of OD commands. Rather, IOD's and OD's are composed of component descriptors. OD commands refer to those elements in listed in Table 2 in 14496-1. -Richard From rkoenen intertrust.com Thu Jul 26 11:12:10 2001 From: rkoenen intertrust.com (Rob Koenen) Date: Wed Jul 30 14:06:38 2003 Subject: [M4IF Technotes] (no subject) Message-ID: <720AE932C238D411B4D100C04F10DA6B02DEBAD5@exchange.epr.com> Dear Tara, This is not a question for the technotes list. Please contact Leonardo Chiariglione (see CC) or give me a call, see below. I am on Pacific Daylight Time, 8 hours behind UK Best Regards, Rob Rob Koenen Senior Director of Technology Initiatives InterTrust Technologies Corporation tel +1 (408) 855 6891 gsm +1 (408) 823 7512 fax +1 (408) 855 0130 rob@intertrust.com See http://www.m4if.org for the latest on MPEG-4 -----Original Message----- From: Pletz Tara [mailto:TPletz@euromoneyplc.com] Sent: Thursday, 26 July, 2001 4:30 To: 'technotes@lists.m4if.org' Subject: [M4IF Technotes] (no subject) What does the approval of -AFX VM 3.0 -WD 3.0 of IPMP extension -CD of part 8 "4 on IP framework" mean to commercial companies ? Who will be positively affected by this and why? Tara Pletz Journalist/Researcher Broadcasting Strategies & Finance Week Techmedia, Euromoney Institutional Investor PLC Nestor House Playhouse Yard London, UK EC4 5EX Phone: +44 (0)20 7779 8466 Fax: +44 (0)20 7779 8492 E-mail: tpletz@euromoneyplc.com www.broadcastingstrategies.com DISCLAIMER: The information in this email is confidential. 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This communication is from Euromoney Institutional Investor PLC, a company registered in England and Wales under company number 954730 with registered office at Nestor House, Playhouse Yard, London EC4V 5EX. -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20010726/bd3dc2de/attachment.html From chris avipix.com Thu Jul 26 14:37:05 2001 From: chris avipix.com (Christopher Wendt) Date: Wed Jul 30 14:06:38 2003 Subject: [M4IF Technotes] Sub-part of a presentation References: <43D8F7C6A2AFD411969D00508BCFA06B4C12B7@smi-mail.sorenson.com> Message-ID: <02eb01c115f9$96ed0400$0301000a@cw> Hi Richard, all, > So, the OD stream in the main file creates a video object and an audio > object that both have url references to the same file that contain a video > stream and an audio stream. But how would that file that contains the audio > and video be constructed? Would it contain just the elementary streams for > audio and video? It would have to contain an iods according to 13.2.3.4. > And, according to 8.6.4.1 the IOD contained in the iods must refer to at > least one stream but it cannot refer to both the audio and the video stream > according to 8.7.1.2. So, how is it accomplished? > There is a couple ways you can do this. Your main file has an IOD and BIFS and OD tracks. The OD track contains an OD command with the video OD and audio OD. One way is: Those OD's contain urls to the remote OD's. The remote file contains a root OD (not IOD). which has the OD information for the Audio and Video ES's. Another way is: Those OD's contain urls to the remote ES's directly in which case the remote file doesn't need to contain any OD or IOD. A third way: You can also have a remote URL contained in the file format Data Reference atom. > > > Can an iods atom contain OD commands? Sorry, let me correct myself, an IOD is an OD with the P&L info in front, so no it cannot contain OD commands. (But the other way around is true, an OD command can contain an IOD) The OD stream itself is composed of OD commands which contain OD's. > > 13.2.3.4 states that an iods contains *an* Object Descriptor or *an* Initial > Object Descriptor. So, from that, I understand that the iods contains only > one IOD or OD. You cannot string together a series of OD's in the iods like > you can in an ObjectDescriptorUpdate command. Would anyone disagree with > that statement? It would have been nice if you could string together all of > your objects in the iods that would be in existance at time 0 so you would > not have to have an OD stream. Right, the purpose of the IOD is to initialize the presentation, and most likely the IOD will be transmitted out of band, which is why it exists and does not contain all of the presentation information. -Chris ------------------------------------------------------------- Christopher Wendt, avipix, llc chris@avipix.com (732) 682-5549 http://www.avipix.com From richard sorenson.com Fri Jul 27 10:34:15 2001 From: richard sorenson.com (Richard Shields) Date: Wed Jul 30 14:06:38 2003 Subject: [M4IF Technotes] Sub-part of a presentation Message-ID: <43D8F7C6A2AFD411969D00508BCFA06B4C1340@smi-mail.sorenson.com> Hi Chris, all, > There is a couple ways you can do this. > Your main file has an IOD and BIFS and OD tracks. > The OD track contains an OD command with the video OD and audio OD. > One way is: > Those OD's contain urls to the remote OD's. > The remote file contains a root OD (not IOD). which has the > OD information for the Audio and Video ES's. Where does this root OD exist in the remote file? In the iods? If so, the iods can contain only one OD and a single OD cannot refer to both a video and an audio stream. > Another way is: > Those OD's contain urls to the remote ES's directly in which > case the remote file doesn't need to contain any OD or IOD. OK... the specification for the file format states that the iods is mandatory. Is that not true in this case? Or can an iods exist but not contain an IOD or OD? > A third way: > You can also have a remote URL contained in the file format > Data Reference atom. -Richard From chris avipix.com Fri Jul 27 12:56:28 2001 From: chris avipix.com (Christopher Wendt) Date: Wed Jul 30 14:06:38 2003 Subject: [M4IF Technotes] Sub-part of a presentation References: <43D8F7C6A2AFD411969D00508BCFA06B4C1340@smi-mail.sorenson.com> Message-ID: <046301c116b4$b3135ec0$0301000a@cw> Hi Richard, all, > Where does this root OD exist in the remote file? In the iods? Yes. > If so, the > iods can contain only one OD and a single OD cannot refer to both a video > and an audio stream. Right, this is probably not the optimal way to do it (a least just for an A/V presentation), it's more useful for inline scenes actually. You require a BIFS and OD streams for the root OD. > OK... the specification for the file format states that the iods is > mandatory. Is that not true in this case? Or can an iods exist but not > contain an IOD or OD? The iods atom is not required for the case of using data reference. If you don't have an IOD or root OD, then don't create a iods atom. -Chris ------------------------------------------------------------- Christopher Wendt, avipix, llc chris@avipix.com (732) 682-5549 http://www.avipix.com From richard sorenson.com Fri Jul 27 14:32:45 2001 From: richard sorenson.com (Richard Shields) Date: Wed Jul 30 14:06:38 2003 Subject: [M4IF Technotes] Sub-part of a presentation Message-ID: <43D8F7C6A2AFD411969D00508BCFA06B4C137E@smi-mail.sorenson.com> Chris, Thanks for clearing this up for me. To me, it seems that the specification needs work in the area of sub-presentations. It doesn't seem very clear especially when the specification indicates that an item is mandatory, such as the iods, but really isn't in all cases. -Richard > -----Original Message----- > From: Christopher Wendt [mailto:chris@avipix.com] > Sent: Friday, July 27, 2023 9:56 AM > To: Richard Shields; technotes@lists.m4if.org > Subject: Re: [M4IF Technotes] Sub-part of a presentation > > > Hi Richard, all, > > > Where does this root OD exist in the remote file? In the iods? > Yes. > > If so, the > > iods can contain only one OD and a single OD cannot refer > to both a video > > and an audio stream. > Right, this is probably not the optimal way to do it (a least > just for an > A/V presentation), it's more useful for inline scenes > actually. You require > a BIFS and OD streams for the root OD. > > > OK... the specification for the file format states that the iods is > > mandatory. Is that not true in this case? Or can an iods > exist but not > > contain an IOD or OD? > The iods atom is not required for the case of using data > reference. If you > don't have an IOD or root OD, then don't create a iods atom. > > -Chris > > ------------------------------------------------------------- > Christopher Wendt, avipix, llc > chris@avipix.com > (732) 682-5549 > http://www.avipix.com > From rkoenen intertrust.com Mon Jul 30 10:23:47 2001 From: rkoenen intertrust.com (Rob Koenen) Date: Wed Jul 30 14:06:38 2003 Subject: [M4IF Technotes] how mpeg-4 is transmitted over atm?? Message-ID: <720AE932C238D411B4D100C04F10DA6B03CB8A4D@exchange.epr.com> Guido, any clue? > -----Original Message----- > From: Deepak.Raina@lntinfotech.com > [mailto:Deepak.Raina@lntinfotech.com] > Sent: Tuesday, 24 July, 2001 22:48 > To: technotes@lists.m4if.org > Subject: [M4IF Technotes] how mpeg-4 is transmitted over atm?? > > > > I want to get the details for mpeg-4 transmission over atm?? > where can i > get the information. Can any one suggest the web site or > company who has > worked for MPEG4 over ATM network. > > Regards > Deepak > > _______________________________________________ > Technotes mailing list > Technotes@lists.m4if.org > http://lists.m4if.org/mailman/listinfo/technotes > From Guido.Franceschini TILAB.COM Mon Jul 30 19:36:37 2001 From: Guido.Franceschini TILAB.COM (Franceschini Guido) Date: Wed Jul 30 14:06:38 2003 Subject: [M4IF Technotes] how mpeg-4 is transmitted over atm?? Message-ID: <1D8DC0052969F84FA43220A350DE63B602E2EA@EXC2K05A.cselt.it> In part 6 of MPEG-4 (DMIF) a section on ATM was included. This was mainly due to Nortel. More recently I received a couple of e-mail asking for work in the ATM area, but none announcing an implementation. Guido Franceschini TILAB - Multimedia Division Via G.Reiss Romoli 274 I-10148 Torino, Italy tel + 39 011 228 6137 fax + 39 011 228 6299 -----Original Message----- From: Rob Koenen [mailto:rkoenen@intertrust.com] Sent: Monday, July 30, 2023 6:24 PM To: 'Deepak.Raina@lntinfotech.com'; technotes@lists.m4if.org; 'Franceschini Guido' Subject: RE: [M4IF Technotes] how mpeg-4 is transmitted over atm?? Guido, any clue? > -----Original Message----- > From: Deepak.Raina@lntinfotech.com > [mailto:Deepak.Raina@lntinfotech.com] > Sent: Tuesday, 24 July, 2001 22:48 > To: technotes@lists.m4if.org > Subject: [M4IF Technotes] how mpeg-4 is transmitted over atm?? > > > > I want to get the details for mpeg-4 transmission over atm?? > where can i > get the information. Can any one suggest the web site or > company who has > worked for MPEG4 over ATM network. > > Regards > Deepak > > _______________________________________________ > Technotes mailing list > Technotes@lists.m4if.org > http://lists.m4if.org/mailman/listinfo/technotes > From kgabor mindmaker.hu Tue Jul 31 11:05:27 2001 From: kgabor mindmaker.hu (Gabor Kerekes) Date: Wed Jul 30 14:06:38 2003 Subject: [M4IF Technotes] MPEG4 PC card Message-ID: <006901c11997$8f739f80$7101a8c0@inside> Hi! I want to get the details for MPEG4 encoder PC cards?? Can any one suggest the web site or company who has MPEG4 encoder hardware in a PC card? Regards Gabor From hagai enquad.com Tue Jul 31 15:55:21 2001 From: hagai enquad.com (Hagai Folkman) Date: Wed Jul 30 14:06:38 2003 Subject: [M4IF Technotes] MPEG4 PC card References: <006901c11997$8f739f80$7101a8c0@inside> Message-ID: <011d01c119c0$11216120$0601a8c0@HAGAI> EnQuad have PC card with embedded DSP for MPEG-4 simple-profile and core-profile encoding. www.enquad.com thanks, hagai ----- Original Message ----- From: "Gabor Kerekes" To: Sent: Tuesday, July 31, 2023 10:05 AM Subject: [M4IF Technotes] MPEG4 PC card > Hi! > > I want to get the details for MPEG4 encoder PC cards?? > Can any one suggest the web site or company who has > MPEG4 encoder hardware in a PC card? > > Regards > Gabor > > > _______________________________________________ > Technotes mailing list > Technotes@lists.m4if.org > http://lists.m4if.org/mailman/listinfo/technotes > From cmail ureach.com Tue Jul 31 19:04:49 2001 From: cmail ureach.com (Chandrashekar P) Date: Wed Jul 30 14:06:39 2003 Subject: [M4IF Technotes] Doubt on MPEG4 Visual Message-ID: <010c01c119bd$30723930$ea21010a@sasken.com> Hi, Can anybody tells after decoding the MPEG4 Video file, How to create an AVI format file from the received frames as in the form of buffer from a MPEG4 Video decoders. If anyone has an idea, Pls provide details. Thanks & Regards, Chandrashekar. -------------- next part -------------- An HTML attachment was scrubbed... URL: /pipermail/mp4-tech/attachments/20010731/10eb1f88/attachment.html