MPEG asks for MIME review for the MPEG21 file format

[Christian Timmerer (ITEC)]

Dear Graham,
  
> Is there any chance that the standardization committee might be
> persuaded to
> make public release of part 9, describing this file format, in addition
> to parts
> 1, 2 and the schema already made public?  I think that doing so would
> make the
> MPEG21 vision accessible to a wider base of developers.
[Christian Timmerer (ITEC)] Yes there is a chance but it might be difficult since ISO is usually doing this only for technical reports, reference software, and in some exceptional cases for so-called "baseline" standards, i.e., those that are most relevant for a particular standard in order to become adopted by others (e.g., Part 2 of MPEG-21).

Furthermore, MPEG-21 Part 9 is based on the ISO base media file format which is a joint standard between MPEG and JPEG. The ISO base media file format is indeed publicly available [1-4]. However, we might get into troubles why we're asking ISO to make MPEG-21 Part 9 publicly available but not other MPEG file formats, etc. Dave might correct me if I say something wrong here.

I think the best and easiest way how to proceed is to provide you (=IETF) the relevant (=MPEG-21) file format standard(s) through liaison at the next meeting which is at the beginning of July in Lausanne. Anyway, I'll also ask whether it is feasible to make Part 9 of MPEG-21 publicly available.

Thanks.
Best regards,
 -Christian

[1] http://standards.iso.org/ittf/PubliclyAvailableStandards/c041828_ISO_IEC_14496-12_2005(E).zip
[2] http://standards.iso.org/ittf/PubliclyAvailableStandards/c042292_ISO_IEC_14496-12_2005_Cor_1_2005(E).zip
[3] http://standards.iso.org/ittf/PubliclyAvailableStandards/c043226_ISO_IEC_14496-12_2005_Cor_2_2006(E).zip
[4] http://standards.iso.org/ittf/PubliclyAvailableStandards/c043689_ISO_IEC_14496-12_2005_Amd_1_2007(E).zip



> 
> #g
> --
> 
> 
> Christian Timmerer (ITEC) wrote:
> >
> >
> > Dear all,
> >
> >   as the “source” of this MIME type please apologize my late reply
> > because I was one week w/o email access. It took some time to catch
> up.
> > Regarding the “+xml” suffix I agree that it is inappropriate since an
> > MPEG-21 file is not purely XML (see below for further details).
> >
> >
> >
> > MPEG-21 Part 1 (Technical Report) is publicly available [1].
> >
> >
> >
> > Concerning Digital Items, Digital Item Declaration, and MPEG-21 File
> > Format, let me try to clarify something because I think there’s a
> > misunderstanding:
> >
> > ·         A Digital Item can be seen as a digital container format
> that
> > puts (media) resources (e.g., audio, video, image, text (PDF), etc.)
> and
> > metadata (e.g., data describing the resources, licenses, identifiers,
> > etc.) within a standardized structure.
> >
> > ·         A Digital Item is declared by an Digital Item Declaration
> > (DID) which is based on the Digital Item Declaration Language (DIDL)
> > that is a representation of the Digital Item Declaration Model. The
> > model and DIDL are specified in MPEG-21 Part 2 which is publicly
> > available [2]. The model is an abstract model defined using EBNF
> whereas
> > DIDL – the representation of the model – is defined using XML Schema,
> > thus, DID is XML-based. That is, it is possible that other,
> > non-XML-based representation may be derived from the model (However,
> > this should not be the discussion point)
> >
> > ·         A Digital Item may be distributed which means that its
> > declaration (i.e., DID) may be at one location whereas its (media)
> > resources and metadata may be located elsewhere on various locations.
> >
> > ·         The MPEG-21 file puts everything, i.e., (media) resources,
> > metadata, and structure (i.e., declaration), into one file, the MPEG-
> 21
> > file which is binary and contains the DID and (maybe) also the
> > referenced/included (media) resources.
> >
> >
> >
> > Hope this information is helpful for you.
> >
> >
> >
> > Thank you.
> >
> > Best regards,
> >
> >  -Christian
> >
> >
> >
> > [1]
> >
> http://standards.iso.org/ittf/PubliclyAvailableStandards/c040611_ISO_IE
> C_TR_21000-1_2004(E).zip
> >
> > [2]
> >
> http://standards.iso.org/ittf/PubliclyAvailableStandards/c041112_ISO_IE
> C_21000-2_2005(E).zip
> 
> 
> --
> Graham Klyne
> For email:
> http://www.ninebynine.org/#Contact