Joint Collaborative Team on Video Coding (jct-vc) Contribution

8.9TE7 Alternative transforms

This TE will be coordinated by Robert Cohen (Mitsubishi). It will include investigation of methods for MDDT simplification: JCTVC-B024, JCTVC-B042 (1DDUT part) JCTVC-B039/JCTVC-B102, and JCTVC-B073, investigated in a common TMuC environment.

Testing will be conducted using high-complexity hierarchical B and all-intra conditions.

8.10TE8 Parallel entropy coding

This TE will be coordinated by Madhugar Budagavi (TI). It will include investigation of parallel entropy coding technology, including proposals JCTVC-B034, JCTVC-B036, and JCTVC-B088. Two sub-experiments were planned:

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  Parallelization of context adaptation (JCTVC-B036, JCTVC-B088).
  
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  Comparing the static part of JCTVC-B034 V2V (without forward adaptation) against the HHI "PIPE" scheme. The JCTVC-B034 mehtod is claimed to have better throughput than PIPE due to the design of its VLC tables.
  

Specific methods of measuring hardware complexity are planned to be developed in this context.

The validity of such a measure would need to be supported by JCT-VC for taking decisions based on the results.

8.11TE9 Large block structures

This TE will be coordinated by Munchurl Kim (KAIST). It will test the benefit of large block sizes for various picture sizes as proposed in JCTVC-B028 and JCTVC-B082. Subjective quality investigation should also be included.

Two sub-experiments were planned: Investigation of large block structures and investigation of non-square structures (64x32, 32x16, etc.). In regard to the first of these two areas, coordination with testing to be conducted in TE12 will be needed.

8.12TE10 In-Loop filtering

This TE will be coordinated by T. Yamakage (Toshiba). It will include the following:

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  Subtest 1: De-blocking/De-banding filters (4 methods including proposals from Dresden)
  
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  Subtest 2: Wiener-based in-loop filters (4 methods including proposals from Dresden)
  
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  Subtest 3: Adaptive offset/clipping/rounding (2 methods)
  

The results will be evaluated according to both objective and subjective performance.

Tests will be conducted under high efficiency hierarchical B, forward-predictive IBBB for all, and additionally Intra-only coding for sub-test 1.

Post processing is not included in this test – this will be studied in related AHG activity.

It was noted that this TE will require a substantial effort, and that subjective viewing needs to be conducted – coordination with Vittorio Baroncini was encouraged.

8.13TE11 MV coding

This TE will be coordinated by Joel Jung (Orange). It will include investigation of JCTVC-B094, JCTVC-B081, and interleaved MV prediction as proposed by HHI (including comparison of the TMuC against e.g. simple median prediction). More elements of JCTVC-B094 will also be included (how to generate the reduced set, how to produce the index), and the TE description will be modified to use all inter reference configurations.

Some overlap with TE12 investigations (MV competition, merge vs. skip) seems evident, and coordination was encouraged to minimize duplication of efforts.

Test conditions will likely include high efficiency random access and low complexity low delay configurations. The inter coding conditions (low and high complexity, hierarchical B and IBBB) will be included.

8.14TE12 Evaluation of TMuC Tools

This TE will be coordinated by Ken McCann (Zetacast). It will include investigation of coding tools currently in the TMuC.

Several other TEs overlap with TE 12. To avoid duplication of efforts, the TE coordinators should take responsibility to coordinate the work of their TEs with the work on TE12.

9Establishment of ad hoc groups

The ad hoc groups established to progress work on particular subject areas until the next meeting are described in the table below.

Title and Email Reflector	Chairs	Mtg
JCT-VC project management  ([e-mail]) Coordinate overall JCT-VC interim efforts Report on project status to JCT-VC reflector Provide report to next meeting on project coordination status	Gary Sullivan, Jens-Rainer Ohm (co chairs)	N
Test Model under Consideration (TMuC) editing ([e-mail]) Discuss JCTVC-B205 and perform editorial improvements as appropriate Produce JCTVC-B204 encoding and tutorial information corresponding to JCTVC-B205	K. McCann (chair), M. Karczewicz, J. Ridge, S. Sekiguchi, T. Wedi, T. Wiegand (vice chairs)	N
Software development and TMuC software technical evaluation ([e-mail]) Coordinate development of the TMuC software and its distribution to JCTVC members Produce documentation of software usage for distribution with the software Deliver TMuC 0.6 and the reference configuration encodings according to JCTVC-B300 for use in common conditions experiments Complete the integration of the remaining elements of the TMuC design into the software according to the assigned priorities Improve the configurability of the software	F. Bossen (chair), P. Chen, D. Flynn, W.-J. Han, K. Sühring, H. Schwarz, K. Ugur (vice chairs)	N
Alternative transforms ([e-mail]) Study the transforms in the TMuC design, including compression performance, computational complexity, dynamic range, storage requirements, etc. Identify trade-offs of transform characteristics and potential opportunities for simplification of transforms and for reduction in the number of needed transforms Define and conduct experiments related to using alternative, adaptive, mode-dependent directional, and directional transforms for coding Intra and Inter prediction residuals Report the results and conclusions of these experiments to the JCT	R. Cohen, R. Joshi (co-chairs)	N
In-loop and post-processing filtering ([e-mail]) Study enhancement schemes of in-loop filtering, including de-blocking/de-banding/de-noising filters, and adaptive Wiener-based filters including variants with various inputs, combination of filters Study trade-offs and characteristics of filter designs including complexity and subjective and objective performance Discuss relationships and evaluation procedures for the filtering techniques Identify possibilities for harmonization of enhanced in-loop filtering technologies Study the relationship between in-loop and post-processing filtering	T. Yamakage (chair), Y. J. Chiu, M. Karczewicz, M. Narroschke (vice chairs)	N
Large block structures ([e-mail]) Study and compare techniques relating to coding block structure Characterize the trade-offs involved in coding block structure issues, including complexity and compression performance aspects Identify opportunities for harmonization and simplification of coding block structure	K. Panusopone (chair), M. Budagavi, W.-J. Han, D. He (vice chairs)	N
Memory compression ([e-mail]) Study memory compression impact on video encoder and decoder: memory bandwidth reduction, graceful power degradation, etc. Study memory compression schemes including adaptive scaling, DPCM, transform coding, entropy coding, checkerboard sampling, etc.	K. Chono (chair), T. Chujoh, C.S. Lim (vice chairs)	N
Parallel entropy coding ([e-mail]) Study the merits of various approaches for slice level parallelism Study PIPE/V2V, parallel context processing, syntax-element partitioning, and other parallelism approaches Study and develop approaches for hardware and software evaluation of parallel entropy coding at the bin level Raise and discuss additional issues on parallel entropy coding	M. Budagavi (chair), D. He, A. Segall (vice chairs)	N
Screen content coding ([e-mail]) Identify and describe use case scenarios including non-camera-view content Investigate and collect appropriate test material including computer screen captures, mixed video and graphics, animated graphics, game content, CAD video, news content, text overlays, etc. Identify potential needs for action in HEVC standardization	J. Xu, W. Ding (co chairs)	N
Complexity assessment ([e-mail]) Investigate measurement criteria to assess the complexity of encoder and decoder algorithmic design elements, including computational complexity, parallelism, memory bandwidth, memory capacity, dynamic range requirements, etc. Identify and recommend tools for algorithmic complexity assessment	D. Alfonso (chair), J. Ridge, X. Wen (vice chairs)	N