International organisation for standardisation organisation internationale de normalisation

1MPEG-2 video

During the July 2010 meeting, it had been requested to define a similar approach for MPEG-2 Video as was defined for AVC using an SEI message supporting "frame compatible" stereo video with various frame packing arrangements. It was suggested to enable this capability as a user data extension and to put a 4-byte ID after the user_data_start_code to avoid conflicts with existing systems. To initiate further study on this, document N11462 was issued, and NBs were requested to study and comment on the viability of this solution or to propose better solutions. Two comments by NBs were received. From these, the concept of the solution of N11462 appears to be a viable way, keeping compatibility with existing devices and simplifying the launch of new emerging services in that area. To proceed to the next step, PDAM4 was issued. The plan is to proceed to FPDAM 11/01, FDAM 11/07. The method of signaling allows left/right or top/bottom placement of the two stereo views, and switching between mono and stereo within one stream.

It is planned to provide a new edition of MPEG-2 part 2 after finalization of this amendment.
Document(s) reviewed:

m18196	JNB comments on Resolution 2.2.2 (3D Signaling in MPEG-2 video)	Japan National Body
m18030	USNB Contribution: WG11 resolution 2.2.2 consideration	A. G. Tescher for USNB

Document(s) approved:

No.	Title	TBP	Available
11612	Request for ISO/IEC 13818-2:2000/Amd.4	N	10/10/15
11613	Text of ISO/IEC 13818-2:2000/PDAM4 Frame Packing Arrangement Signalling in MPEG-2 Video	N	10/10/29

2MPEG-4 part 2 Software

During several periods of AHG work, various corrections had been provided to the MPEG-4 part 2 reference software, which is located in the MPEG SVN server. As more recently no new bugs had been detected, it can be assumed that the software has reached a mature status. Therefore, it was decided to modify the latest published version by an appropriate corrigendum.

Document(s) reviewed:

m17965

Ad Hoc on Maintenance of MPEG-4 Visual related Documents, Reference Software and Conformance

Yi-Shin Tung, Jens-Rainer Ohm

Document(s) approved:

No.	Title	TBP	Available
11614	Text of ISO/IEC 14496-5:2001/Amd.5 DCOR1	N	10/10/15

3Development of AVC

The video subgroup held two discussion sessions together with VCEG (ITU-T Q6/SG16) to review input documents related to AVC.

The main topics of discussion were

1. 
   Potential corrigendum issues (follow-up of the defect report N11465 issued during the July 2010 meeting).
   
2. 
   Establishment of a “Progressive High Profile”.
   

Regarding the corrigendum work, the most critical issue was the clarification of the positioning indicators for the video data grid related to the AVC frame packing arrangement SEI message. A solution was found that appears to be compatible with existing implementations, which was to designate the (0,0) coordinate position as a special case to be treated as indicating the same positioning as would be indicated by the positioning that had been shown in the example figures.

A need for clarification of the intended buffering capacity requirements for MVC was also identified, discussed and agreed.
Regarding 2D content in 3D application deployments – it was remarked that this should be considered for an amendment/extension activity rather than a corrigendum activity.
A new version of the defect report was issued, which was made publicly available. More editorial work is needed on various items before it can be issued as DCOR.
Following the plan established at the Geneva meeting, a PDAM was issued for defining a new Progressive High Profile. NB comments were requested on issues of level 4.2 restrictions and a potential Progressive Main Profile. No technical changes were made relative to the previous WD. Instead of defining a new conformance point via a new value of profile_idc, the specification uses the constraint_set4_flag in a manner similar to its use for multiview/interlaced Stereo High profile cases.
One contribution (m18337) requested for the Progressive High Profile to impose further restrictions on level 4.2 and higher levels. Specifically, it was proposed that a maximum number of slices per row of macroblocks be established, with a maximum value of two slices per row, and that no predictions blocks smaller than 8x8 should be allowed. These issues require further study on their possible impact and desirability; therefore NBs were requested by a resolution to comment. The specification of a new, similarly-constructed “Progressive Main Profile” was also suggested in the same contribution.
Document(s) reviewed:

m18197	JNB comments on N11465 about frame packing arrangement SEI message Request: (0,0) should be compatible with figures	Japan National Body
m18031	USNB Contribution: WG 11 resolution 3.3.2 consideration Request: (0,0) should be "undefined" (in conflict with JNB) – a compromise was drafted in which (0,0) would indicate "default" positions as illustrated. Various issues on MVC	A. G. Tescher for USNB
m18337	Level Limits for Progressive High Profile Restrict number of slices (2) in rows of macroblocks for level 4.2 and higher Restrict level 4.2 and higher to only 8x8 prediction blocks Specify Progressive main profile as well	Aaron Wells
m18338	On the AVC frame packing arrangement SEI message Sample aspect ratio 2D content in 3D signaling (comment: this should be an amendment rather than corrigendum) Grid position indicator Semantics sentence placement	G. J. Sullivan (Microsoft)
m18339	Miscellaneous AVC (ITU-T H.264 | ISO/IEC 14496-10) errata issues	G. J. Sullivan (Microsoft), H. Schwarz (Fraunhofer HHI)

Document(s) approved:

No.	Title	TBP	Available
11615	Defect report on ISO/IEC 14496-10:201x	Y	10/10/31
11616	Text of ISO/IEC 14496-10:201x/PDAM1 Progressive High Profile	N	10/10/15