International organisation for standardisation organisation internationale de normalisation

Ad hoc groups formed

The ad hoc groups (AHGs) formed for carrying out work in particular subject areas until the next meeting are listed in the table below, along with mandates for the work to be conducted. The email reflector to be used for discussions of all of the listed AHGs is the JCT-VC reflector: [e-mail]. None of these AHGs were planned to hold meetings.

AHG Title and Email Reflector	Chairs	Mtg
JCT-VC project management ([e-mail]) Coordinate overall JCT-VC efforts Report on project status to JCT-VC reflector Provide report to next meeting on project coordination status	Gary Sullivan ([e-mail]), Jens-Rainer Ohm ([e-mail]) [co-chairs]	N
Test Model under Consideration editing ([e-mail]) Discuss JCTVC-A205 and perform editorial improvements as appropriate	K. McCann ([e-mail]) [chair] M. Karczewicz, J. Ridge, S. Sekiguchi, T. Wiegand [vice chairs]	N
Software development and TMuC software technical evaluation ([e-mail]) Study the available software packages in terms of suitability for software integration Establish a work plan for the development of the common software implementation of TMuC according to the agreed priorities Coordinate development of the software and its distribution to JCTVC members Conduct experiments on the TMuC software to determine encoder settings Provide performance information according to the feasible status	F. Bossen ([e-mail]) [chair] P. Chen, D. Flynn, H. Schwarz, K. Ugur [vice chairs]	N
Intra prediction ([e-mail]) Study the enhanced schemes in intra-prediction including block sizes, directionality, resampling, line-based & 2x8/8x2, pre/post-filtering, and chroma prediction using luma. To discuss the relationship and the evaluation procedure among the schemes studied in mandate 1 Propose Core Experiments	C. Auyeung ([e-mail]) [chair] S. Lei, K. Sugimoto, H. Yu [vice chairs]	N
Alternative transforms ([e-mail]) To define and conduct experiments related to using alternative, adaptive, mode-dependent directional, and directional transforms for coding prediction residuals To select a common codebase upon which these experiments will be performed To define and conduct experiments related to transforms proposed for the CfP, including but not limited to The Orthogonal Mode-Dependent Directional Transform of JCTVC-A101 The Directional Unified Transform of JCTVC-A117 The Directional Transform of JCTVC-A107 The Directional Transform of JCTVC-A111 The Adaptive DCT/DST of JCTVC-A122 DDCT of JCTVC-A103 Alternate KLT of JCTVC-A114 To evaluate and report the performance characteristics of these transforms, using Objective measures (BD-Rate, BD-PSNR) Subjective descriptions (i.e., what kinds of artifacts are produced by each transform, what kinds of textures/features these transforms work best) Complexity (computational, memory, encoder) To report the results and conclusions of these experiments to the JCT	R. Cohen ([e-mail]), R. Joshi ([e-mail]) [co-chairs]	N
MV precision ([e-mail]) Compare and summarize different ideas on motion vector precision in proposals to HEVC CfP Compare and summarize different interpolation filtering schemes, necessary for fractional-pel motion vector precision Raise and discuss various issues on motion vector precision, adaptive scheme, different interpolation filters, etc. Discuss issues on how to evaluate different methods related to motion vector precision Study and propose possible core experiment(s) on this topic	B. Jeon ([e-mail]) [chair] X. Wang, S. Wittmann, T. Suzuki [vice chairs]	N
In-loop filtering ([e-mail]) To study enhancement schemes of in-loop filtering, including de-blocking/de-banding/de-noising filters, adaptive Wiener-based filters including variants with various inputs, combination of in-loop filters and noise aware loop filters To discuss the relationship and the evaluation procedure among the schemes studied in mandate 1	T. Yamakage ([e-mail]) [chair] Y.J. Chiu, M. Narroschke, X. Wang [vice chairs]	N
Large block structures ([e-mail]) To compare and summarize different ideas on coding block structure in proposals to HEVC CfP. To define and conduct experiments related to coding block structure. To raise and discuss various issues on intra mode block structure for both luma and chroma components and inter mode block structure for both luma and chroma components. To report the results and conclusions of these experiments to the JCT-VC.	K. Panusopone ([e-mail]) [chair] M. Budagavi, D. He [vice chairs]	N
Parallel entropy coding ([e-mail]) Compare and summarize different ideas on parallel entropy coding in proposals to HEVC CfP. Raise and discuss various issues on parallel entropy coding. Discuss how to evaluate different methods related to parallel entropy coding.	M. Budagavi ([e-mail]), A. Segall ([e-mail]) [co-chairs]	N

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