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

3.5Profile and level definitions (requirements related) (11)

3.5.1RExt profiles and levels (7)

JCTVC-P0057 AHG 5: Profiles for Range Extensions [K. Sharman, N. Saunders, J. Gamei, T. Suzuki, A. Tabatabai (Sony)]
JCTVC-P0058 AHG 5 and 18: Request for 16 bit Profiles for Range Extensions [K. Sharman, N. Saunders, J. Gamei, T. Suzuki, A. Tabatabai (Sony)]
JCTVC-P0086 A proposal on level specification of Main 4:2:2 profiles [A. Minezawa, K. Miyazawa, S. Sekiguchi, H. Sakate (Mitsubishi)]

See notes for P0044. Detailed review was not requested.

JCTVC-P0099 AHG5: Objective and subjective evaluations of cross-component decorrelation for range extensions profile [K. Kawamura, S. Naito (KDDI)]
JCTVC-P0106 AHG5: Recommended profiling of range extension coding tools [S. Lee, E. Alshina, C. Kim (Samsung), K. McCann (Zetacast)] [late]
JCTVC-P0107 AHG5: Tools for lossless coding of medical image/video content in RExt profiles [P. Amon, P. Wojaczek, A. Hutter, U.-E. Martin, N. Wirsz (Siemens)]
JCTVC-P0224 Request for an HEVC 4:4:4 8 bit profile [Gaelle Martin-Cocher, Marta Mrak, Patrice Onno, Chris Rosewarne, Arild Fuldseth, Rickard Sjöberg, Alberto Duenas, Marta Karczewicz, Andrew Segall] [late]

3.5.2SHVC profiles and levels (4)

JCTVC-P0127 AHG14: On a CGS profile for SHVC [P. Andrivon, P. Bordes, E. François (Technicolor), X. Ducloux (Thomson Video Networks), Y. Ye (Interdigital), A. Duenas (NGCodec), A. Segall (Sharp Labs), Kemal Ugur (Nokia), Xiang Li (Qualcomm), Elena Alshina (Samsung)]

This contribution requests to define a profile for the HEVC scalable extension supporting colour gamut and bit-depth scalability (CGS). Such a scalability technology may be considered in applications standardization committees such as DVB CM-AVC/CM-UHDTV or ATSC3.0. Considering the foreseeable evolution of capture and display device capabilities and use cases, it was asserted that CGS appears to be one major feature to be supported in upcoming mainstream applications. This contribution also suggests to conduct liaison communication on colour gamut scalability requirements and performance between DVB CM-AVC/CM-UHDTV, SC 29/WG 11 and SG 16.

See action recorded from parent level.

Decision: Scalable Main 10 Profile will be as in scalable main and allowing 10 bit in base and ELs.

JCTVC-P0134 Strawman SHVC level constraints [J. Boyce (Vidyo)]

Discussed 01-16 (GJS).

The current SHM draft specification does not define level constraints for SHVC. "Strawman" Scalable Main profile-specific level constraints are proposed. All of the existing general level constraints would apply individually to each layer within the operation point corresponding to the output layer set conforming to the profile/tier/level. In addition, cumulative constraints for all decoded layers are imposed for total picture size, total sample rate and total bit rate, equal to 2x their respective level limits for Main profile.

Decision: Adopt.

Further editorial work may be needed for expressing the bit rate limit.

It was noted that it is necessary to also develop a specification of levels for an enhancement-only profile.

JCTVC-P0142 On SHVC level limits [M. M. Hannuksela (Nokia)]

Discussed 01-16 (GJS).

Proposal #1: It is proposed to constrain the value of max_vps_dec_pic_buffering_minus1[ i ][ k ][ j ] as follows:

• 
  max_vps_dec_pic_buffering_minus1[ i ][ k ][ j ] shall be in the range of 0 to MaxDpbSize − 1 (as specified in clause A.4), inclusive.
  

It is asserted that previously the sub-DPB sizes were not constrained at all.

Proposal #2:

• 
  #2a: It is proposed to add a profile-specific constraint (for the Scalable Main profile and the potential Scalable AVC profile) on cross-layer DPB usage.
  
• 
  #2b: The value of the constraint is proposed to be equivalent of allowing MaxDpbSize pictures in the sub-DPBs of a two-layer bitstream with 1.5x scalability.
  

It is asserted that this constraint leaves encoders the flexibility to support any number of layers from 2 to 8, inclusive, for the scalable profiles, while provides a smaller upper limit for the DPB memory usage than the current limit, which is reportedly 8 * MaxDpbSize, where MaxDpbSize is asserted to be 6 for typical picture sizes used under the levels. When quality scalability is in use, all layers may have the same picture width and height and hence the current upper limit of the DPB memory usage is asserted to be 48 pictures in typical picture sizes. With the proposed constraint, the upper limit of the DPB memory usage is asserted to be equivalent to (1 + 2/3 * 2/3) * MaxDpbSize, i.e. about 9 pictures in typical picture sizes (in units of the highest enhancement layer pictures).

Illustrative figures were added in version 2.

JCTVC-P0192 is related; see notes on that contribution.

JCTVC-P0203 Hybrid codec scalability profile in SHVC [J. Samuelsson, J. Enhorn, R. Sjöberg (Ericsson)]

See also section 6.4.3.

3.6HEVC, SHVC and RExt use cases (requirements related) (3)

JCTVC-P0159 High Dynamic Range video coding [S. Lasserre, F. Le Leannec, E. François (Technicolor)] [late]
JCTVC-P0080 HDR coding results for FruitStall and Oblivion [B. Mandel (Universal), C. Fogg (Harmonic), J. Helman (Movielabs)]
JCTVC-P0162 On 16-bit coding [A. Aminlou, K. Ugur (Nokia)] [late]

3.7Source video test material (2)

JCTVC-P0042 Source content for HEVC verification testing [J. Boyce (Vidyo)]

See also AHG19 report on verification testing.

Source content was donated to the public domain – and planned for use in verification testing.

JCTVC-P0228 Description of HDR sequences proposed by Technicolor [S. Lasserre, F. Le Leannec, E. François (Technicolor)] [late]

Five high dynamic range (HDR) test sequences were proposed for experiments in the context of MPEG and JCT-VC HDR video coding exploration works. These sequences have been created in the framework of the French NEVEX collaborative project, by Binocle, Technicolor for four of them, and Polymorph Software for one of them. The document provides a description of these sequences.

These are HDR sequences (different than other sequences provided by Technicolor).

These use half-float representation in RGB with BT.709 primaries and linear EOTF.

JCTVC-P0229 Quantitative quality evaluation of images for HDR and WCG coding [S. Lasserre, F. Le Leannec, E. François (Technicolor)] [late]

An analysis of objective quality metrics is provided in the context of HDR and WCG content coding. The presentation is provided in the attached pdf slides.

Information document; detailed presentation was not requested.

JCTVC-P0313 AHG19: License for provided material in verification tests [P. Andrivon (Technicolor)] [late]

Technicolor provided an attached updated license corresponding to the provided test material for HEVC and SHVC verification tests.

The attached license applies to the following sequences provided by Technicolor:

• 
  BT709Birthday_3840x2160_50_10bit.yuv
  
• 
  BT709Parakeets_1280x720_50.yuv
  
• 
  BT709BirthdayFlash_960x540_50.yuv
  
• 
  BT709BirthdayFlash_832x480_50.yuv
  

Production and characteristics of the sequences are described in JCTVC-N0163.