International organisation for standardisation organisation internationale de normalisation

No.	Title	TBP
Available
12549	Request for Subdivision: ISO/IEC 15938-13 Compact Descriptors for Visual Search	N	12/02/10
12550	Test Model 1: Compact Descriptors for Visual Search	N	12/02/20
12551	Core Experiments in Compact Descriptors for Visual Search	N	12/02/10

9Web video coding

The draft text of 14496-29 had reached maturity due to the effort of the editors, such that it became possible to proceed as CD ballot text.
An AHG was appointed (N12757, as recorded in N12629) to conduct further work until the 101st meeting.
Document(s) reviewed:

m24036	Ad hoc on Web Video Coding	Krasimir Kolarov, David Benham, Gaëlle Martin-Cocher, Jesus Sampedro, Dave Singer, Thomas Wiegand
m25092	CANNB comments on WebVC	G.Martin-Cocher, L.Winger

Document(s) approved:

No.	Title	TBP	Available
12733	Text of ISO/IEC CD 14496-29 Web Video Coding	Y	12/05/04

10Internet video coding

During the AHG period, further work was performed in investigating the performance of the test model software. It was found that quarter-pel accuracy (using bilinear filters) of MC does not provide any benefit, but rather has a loss in performance. If was therefore removed from the default testing conditions. Furthermore, the relatively poor performance in intra coding was analysed. The intra coding (in terms of transform, DC coefficient prediction) is still very much of the JPEG, MPEG-1/-2 style. The simulations used a setting with IQP=4, other QP=32 (suggestion: use more decent setting such as QP-4).

With the current configuration, the following building blocks establish the primary differences compared to MPEG-1/-2:

• 
  Q-Coder (without context adaptation and with fixed probability initialization)
  
• 
  Variable block-size MC and transform (4x4, 8x8, 16x16)
  

During the MPEG meeting, efforts were made to test these elements separately in comparison against MPEG-2. Results were given in a newer version of the AHG report (M24036). The results are howewer to some extent diverging, w.r.t. behaviour in chroma components, and when checking the differences sequence by sequence.

Further effort is necessary to make progress, and involvement of additional experts is urgently needed.
The AU NB suggested to make more effort on acquiring new technology from outside MPEG. An appropriate mandate was additionally given to the AHG.
An AHG was appointed (N12758, as recorded in N12629) to conduct further work until the 101st meeting.
Document(s) reviewed:

m24036	Ad hoc on Web Video Coding	Krasimir Kolarov, David Benham, Gaëlle Martin-Cocher, Jesus Sampedro, Dave Singer, Thomas Wiegand
m24037	Ad hoc on Internet Video Coding	Cliff Reader, Jianwen Chen
m24934	Proposed Text of Working Draft for MPEG Internet Video Coding	Jianwen Chen, Cliff Reader, Rob Glidden
m24973	Comments on AUNB request to include non-proposer IPR in MPEG IVC	Rob Glidden, Cliff Reader
m24750	AUNB comment addressing N12254 resolution 15.3.3 (to be discussed in IPR meeting)	Mohamad Raad
m25092	CANNB comments on WebVC	G.Martin-Cocher, L.Winger

Document(s) approved:

No.	Title	TBP	Available
12733	Text of ISO/IEC CD 14496-29 Web Video Coding	Y	12/05/04
12748	Internet Video Coding Test Model (ITM) v 2.0	N	12/05/18
12749	Experimentation plans in Internet Video Coding	N	12/05/18