International organisation for standardisation organisation internationale de normalisation

2Disposition of Input Documents

2.1AHG reports

Number	Session	Title	Source		Dispositions
m22881	General	Ad hoc on MPEG File Formats	David Singer, Per Fröjdh	accepted
m22882	General	Ad hoc on Application Format	Kyuheon Kim, Gero Baese	accepted
m22883	General	Ad hoc on Font Format Representation	Vladimir Levantovsky	accepted
m22884	General	Ad hoc on MPEG-M	Xin Wang, Youngkwon Lim	accepted
m22885	General	Ad hoc on MPEG-V	Marius Preda	accepted
m22886	General	Ad hoc on Contract Expression Language	Xin Wang, Jaime Delgado	accepted
m22888	General	Ad hoc on Dynamic Adaptive Streaming over HTTP	Iraj Sodagar, David Singer, Youngkwon Lim	accepted
m22889	General	Ad hoc on MPEG Media Transport	Youngkwon Lim, Mohammed Raad	accepted

All AHG reports are accepted.

2.2General technical contributions

Number	Session	Title	Source		Dispositions
m22895	General	Table of Replies on ISO/IEC 14496-12:2008/FDAM 3	ITTF via SC 29 Secretariat		Noted
m22897	General	Table of Replies on ISO/IEC 23007-1:2010/FDAM 1	ITTF via SC 29 Secretariat		Noted
m22901	General	Table of Replies on ISO/IEC FDIS 23001-7	ITTF via SC 29 Secretariat		Noted
m23746	General	MPEG SVN User Manual	Christian Tulvan, Marius Preda		Noted
m23792	General	Beyond MPEG collaboration	Mihai MITREA, Jamie MARSHALL, Bojan JOVESKI, Rama-Rao GANJI, Françoise PRETEUX, Youngkwon LIM, ,	Noted
m23793	General	On codec-independent audio code points	Stefan Doehla, Max Neuendorf, Stephan Schreiner	accepted (N12534)
m23611	General	On HEVC file format	Y. -K. Wang, Y. Chen	accepted (n12535)

m22895 Table of Replies on ISO/IEC 14496-12:2008/FDAM 3

All approved, thank you. Editor to incorporate the {} from the UK into the final amendment.

m23793

list of items regarding audio channel representation and dynamic range descriptions.

might need collaboration with ATSC and DVB on volume/dynamic range description.

m23611 On HEVC file format

We start a WD, with the open question of where this goes (a separate part, or a revised Part 15, called Storage of NAL-structured video?). We change to incorporate some ideas from the next one – a single array (called initializationArray), for example. We check whether width and height are already covered by a visual sample entry.

The group would prefer to leave MPEG-H file format open to the exploration below, and make this part of a re-named 14496-15 (Storage of NAL Unit structured video in the ISO Base Media File Format). Chair to talk to Ogura-san to explore what renaming means.

2.3Carriage of HEVC

Number	Session	Title	Source		Dispositions
m23906	Carriage of HEVC	Request for Amendment to MPEG-2 Systems and ISO Base Media File Format supporting HEVC	Gero Bäse on behalf of GNB	Noted
m23460	Carriage of HEVC	Request for amendment to MPEG-2 Systems	A. G. Tescher for USNB	Noted
m23838	Carriage of HEVC	HEVC in MP4	David Singer	accepted (N12535)
m23573	Carriage of HEVC	Framework for transport of HEVC in MPEG-2 systems	Sam Narasimhan	accepted (N12466)
m23706	Carriage of HEVC	Transport of HEVC over MPEG-2 Systems	Karsten Grüneberg, Thomas Schierl	accepted (N12466)

2.4Summary of discussion

m23573

Basic idea is to reuse the technologies defined for carriage of AVC.

• 
  It is proposed to support only TS, excluding PS as they are almost not used. (This might need Systems’ resolution to solicit comments)
  
• 
  Proposal to use byte-stream format only.
  
• 
  the access unit to always start with the AU delimiter NAL unit
  
• 
  Define ‘HEVC slice’, ‘HEVC video sequence’, ‘HEVC video stream’ and ‘HEVC still picture’
  
• 
  HEVC ‘still picture’ is an access unit with IDR or CRA picture preceded by SPS and PPS required to decode this picture (similar to AVC where still picture is an IDR picture)
  
• 
  Random access point - requiring relevant SPS and PPS, the AVC-like definition and allows broadcast applications to mandate IDR or I-picture or CRA at RAP
  
• 
  Elementary stream priority indicator – this is set to ‘1’ in the packet containing the I-slice start code where the access unit can be decoded without prior access units.
  
• 
  HEVC should also follow the same model once HRD and VUI definitions are completed in HEVC
  
• 
  not clear about the support of low-delay except fixed_frame_rate flag defined in AVC
  
• 
  proposal to re-consider T-STD constraints
  

m23706

Proposal for MPEG-2 Systems amendment to support HEVC. Proposal includes support of PS. It has been discussed it might be needed to signal CRA as it provide different random access behavior from that of IDR.
m23838

Continuation of AVC file format with minor changes such as putting SPS, PPS as part of media stream. We might need further clarification or improvements on RAP (SAP) definitions.

3MPEG-2 Systems (13818-1)

3.1Topics

3.1.1ISO/IEC 13818-1:2007 AMD 7 Signalling of frame compatible and service compatible stereoscopic video

3.1.2ISO/IEC 13818-1:2007 AMD 8 Simplified carriage of MPEG-4 over MPEG-2

3.1.3ISO/IEC 13818-1:2007 AMD 9 DASH support & MIME Type

3.2Contributions

Session	Number	Title	Source		Dispositions
m22903	MPEG-2	Summary of Voting on ISO/IEC 13818-1:2007/DAM 7	ITTF via SC 29 Secretariat	accepted (N12461)
m23587	MPEG-2	Comments on 13818-1:2007/DAM 8	Jean Le Feuvre, Romain Bouqueau,	accepted (N12463)
m23588	MPEG-2	Comments on 13818-1:2007/PDAM 9	Jean Le Feuvre, Romain Bouqueau,	accepted (N12464)

3.3Summary of discussions

m22903

Comments from Germany, UK and US. All comments are successfully resolved.

3.4Action Points

• 
  ISO/IEC 13818-1:2007/DAM 7 ballot until 2012-01-16
  

4MPEG-4 ISO Base File Format (14496-12)

4.1Topics

4.1.1ISO/IEC 14496-12:2008/AMD 2 Support for sub-track selection & switching, post-decoder requirements, and color information

4.1.2ISO/IEC 14496-12:2008/AMD 3 DASH support and RTP reception hint track processing

4.1.3ISO/IEC 14496-12:2008/AMD 4 MP4 files as a playlist using file tracks

4.2Contributions

Number	Session	Title	Source	Dispositions
m23576	File Format	Super-I-Frame and Audio/Systems Interaction	S. R. Quackenbush	noted
m23607	File Format	Editor's proposed basis for 14496-12 4th edition	David Singer	accepted (12468)
m23612	File Format	On ISO base media file format	Y. -K. Wang	accepted (N12470)
m23690	File Format	On container boxes	Ingo Hofmann	noted
m23691	File Format	On SAP definitions	Ingo Hofmann	noted
m23760	File Format	Comments on ISO base media file format enhancements	Per Fröjdh	accepted (N12469)

4.3Summary of discussions

m23607 Editor's proposed basis for 14496-12 4th edition

Disposition:

Question: do we wait for COR5 or AMD4? Only COR5, editor to prepare the edition for publication once COR5 has a final text (or is disapproved). We note the mention of ‘iods’ under ‘isom’ but the iods is not defined here. We add a note and, if needed, an informative reference to part 14 (yes, in bibliographic).

“NOTE the ‘iods’ box is defined in ISO/IEC 14496-14”
m23760 Comments on ISO base media file format enhancements

Disposition: accepted

Thank you. We will issue a study of amd.4.
m23690 On container boxes

Disposition: noted

Alas, the meta box breaks the ‘rule’ (it’s a fullbox, probably a mistake). The guideline is in Annex C.

“Boxes containing other boxes are known as container boxes, and are normally a plain (non-full) box, since their semantics will never change if they are documented to contain only boxes.”

m23612 On ISO base media file format

Disposition:accepted

We will issue a study of DCOR5. Whether anyone will now understand is the subject of a separate contribution.
m23576

Switching between two streams of the same codec: no issue if bitstream is valid, which mean implying some restrictions during encoding.

Switching between two streams of the different codecs: For USAC works. Will have dropped out for other coders, because the 2nd coder needs two pre-rolls for instantiation.