Joint Collaborative Team on Video Coding (jct-vc)

3Project development, status, and guidance (29)

PDAM ballot comments review and response.

3.1Communication to and by parent bodies (0)

See section 7.1.

3.2Conformance test set development (2)

JCTVC-P0085 Conformance testing [C. Fogg (Harmonic), A. Wells, D. Le Gall (Ambarella)]

Conformance bitstreams testing some high-level aspects including HRD, are largely absent from the current test suite. It is proposed to add key combinations that will be relied upon in systems. The contributor asserted that bitstreams demonstrating correlation among the display timing elements (pic_struct, vui_time_scale, etc.) and bitstream splice users (time code, HRD) could assist implementers in the use of these elements.

For repeated pictures, the contribution suggested that the reconstructed .yuv file output by the reference decoder would contain the repeated pictures.

It was remarked that the "repeated picture" concept is more a display issue than a decoder output conformance issue, so it may not be desirable for the reference software to modify its output file content based on that, except perhaps in some special mode of decoder operation. Repetition is not a required output behaviour, and thus should not be tested for conformance.

It was agreed that having additional conformance bitstreams testing high-layer syntax (incl. SEI, VUI, parameter sets, HRD, etc.) would be highly desirable (and that the HM reference software may also need work in these areas).

It was asked whether the HM software parses all SEI messages that have been specified.

JCTVC-P0276 Editor's proposed draft text of HEVC conformance testing [T. Suzuki, W. Wan, G. Sullivan] [late]

Latest update from editors. Detailed review not requested.

3.3Version 1 bug reports and cleanup (2)

See also notes for P0187 (no_output_of_prior_pics_flag) and P0043 (AU boundary detection) and P0044 (MinCR) and P0130 (end of bitstream).

LS input from ITU-R to the parent body is relevant to the VUI. Decision: Correct the equations accordingly.

JCTVC-P0064 Defect correction for HEVC version 1 (esp. modulo CPB removal delay wrapping) [G. J. Sullivan, L. Zhu (Microsoft), Y.-K. Wang, A. K. Ramasubramonian (Qualcomm)]

TBA.

Discussion chaired by M. Hannuksela 01-16.

It was requested the update HM according to the proposal.

Two other very small errata reports were include.

Decision: Adopt.

Parent bodies may wish to make note of the AVC action request.

JCTVC-P0223 JPNB comment on HEVC defect report [Japan National Body] [late]

3.4HEVC coding performance, implementation demonstrations and design analysis (10)

3.4.1Version 1 verification test (2)

See also P0042 (source content availability).

JCTVC-P0042 Source content for HEVC verification testing [J. Boyce (Vidyo)]
JCTVC-P0054 Updates to HEVC verification test plan draft 2 [TK Tan, Vittorio Baroncini, Marta Mrak]

TBA.

Discussion 01-16.

Aspects incorporated into P1011.

• 
  Subj test expected to be completed by 3 March
  
• 
  Test sites identified (further detail in P1011)
  
  • 
    BBC
    
  • 
    FUB
    
  • 
    EPFL
    
• 
  HM 12.1 to be used for HM
  
• 
  5 sequences recommended for each of the 4 resolutions to be tested
  

Adjustments as necessary may be needed for 4K content due to limitations of 4K playout.

3.4.2RExt performance and design aspects (3)

JCTVC-P0200AhG8: Performance and complexity analysis of Range Extensions tools [J. Sole, T. Hsieh, C. Pang, M. Karczewicz (Qualcomm)]
JCTVC-P0201 AhG8: Performance of encoder and parameter only changes for Screen Content Coding [J. Sole, C. Pang, L. Zhang, M. Karczewicz (Qualcomm)]
JCTVC-P0213 Comparison of Compression Performance of HEVC Range Extensions Draft 5 with AVC High 4:4:4 Predictive profile [B. Li, J. Xu, G. J. Sullivan (Microsoft)]

3.4.3SHVC performance and design aspects (1)

JCTVC-P0169 Update of JCTVC-O0115 on a pipeline and parallel architecture of an SHVC decoder [W. Hamidouche, M. Raulet (IETR/INSA)]

3.4.4Interlace (3)

JCTVC-P0082 How to use pic_struct [C. Fogg, O. Bar-Nir, P. Haskell (Harmonic), A. Wells, D. Le Gall (Ambarella)]
JCTVC-P0083 pic_struct coding results [C. Fogg (Harmonic)]

3.4.5Implementation demonstrations (1)

JCTVC-P0158 Informal Subjective Video Quality Comparison Between the eBrisk-UHD HEVC and x264 AVC Encoders [M. Horowitz, F. Kossentini, H. Tmar (eBrisk)

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 note for P0044. Detailed review 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)]

TBA.

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 bitrate, 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).

TBAP. 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.