JVET-M0012 JVET AHG report: High-level parallelism and coded picture regions (AHG12) [T. Ikai, M. M. Hannuksela, R. Sjöberg, R. Skupin, W. Wan, Y.-K. Wang, S. Wenger]

The document summarized activities of AHG on High-level parallelism and coded picture regions between the 12th and the 13th JVET meetings.

Related contributions to this meeting were categorized as follows:

• Flexible size tiles
  • JVET-M0066 AHG12: Flexible Tile Partitioning [Y. Yasugi, T. Ikai (Sharp)]
  • JVET-M0423 Cross-check of JVET-M0066: AHG12: Flexible Tile Partitioning [A. Wieckowski (HHI)]
  • JVET-M0376 AHG12: On signalling of flexible tiles [M. Damghanian, R. Sjöberg, M. Pettersson (Ericsson)]
  • JVET-M0459 AHG12: On tiles with partial CTUs [R. Skupin, K. Suehring, Y. Sanchez, T. Schierl (HHI)]
  • JVET-M0527 AHG12: Comments on Tiles and Flexible Tile Partitioning [W. Wan, M. Zhou, T. Hellman, B. Heng, P. Chen (Broadcom)]
  • JVET-M0530 is also related to the flexible tile size.
• Tile partitioning and signalling (extraction also related)
  • JVET-M0121 AHG12: On Rectangular Tile Group [Y. He, A. Hamza (InterDigital)]
  • JVET-M0123 AHG12: On hierarchical tile design [Y. He, A. Hamza (InterDigital)]
  • JVET-M0129 AHG12: On flexible tiling [Y.-K. Wang, Hendry, M. Sychev (Huawei)]
  • JVET-M0130 AHG12: On tile grouping [Y.-K. Wang, Hendry, J. Chen, M. Sychev (Huawei)]
  • JVET-M0134 AHG12: On explicit signalling of tile IDs [Hendry, Y.-K. Wang, J. Chen, M. Sychev (Huawei)]
  • JVET-M0137 AHG12: On tile configuration signalling [M. Sychev, Hendry, Y.-K. Wang (Huawei)]
  • JVET-M0160 AHG17: Flexible tile grouping for VVC [L. Chen, T.-D. Chuang, Y.-W. Huang, S.-M. Lei (MediaTek)]
  • JVET-M0261 AHG12: On grouping of tiles [M. M. Hannuksela, A. Aminlou (Nokia)]
  • JVET-M0373 AHG12: Merge friendly tile group address signalling [R. Sjöberg, M. Damghanian, M. Pettersson (Ericsson)]
  • JVET-M0374 AHG12: Flexible tiles to support MCTS use cases [R. Sjöberg, M. Damghanian, M. Pettersson (Ericsson)]
  • JVET-M0375 AHG12: On uniform tile spacing, M. Damghanian [R. Sjöberg, M. Pettersson (Ericsson)]
  • JVET-M0388 AHG12/AHG17: On merging of MCTSs for viewport-dependent streaming [M. M. Hannuksela (Nokia)]
  • JVET-M0416 AHG12: On Tile Information Signalling [S. Deshpande (Sharp)]
  • JVET-M0430 AHG12: On Tiles and Tile Groups for VVC [R. Skupin, K. Suehring, Y. Sanchez, T. Schierl (HHI)]
  • JVET-M0530 AHG12: On signalling of tiles [M. Coban, M. Karczewicz (Qualcomm)]
• Motion constraint tile (inter) and high level signalling
  • MCTS
    • JVET-M0136 AHG12: Treating tile and tile group boundaries as picture boundaries [J. Chen, Y.-K. Wang, Hendry, M. Sychev (Huawei)]
    • JVET-M0445 AHG12: On motion constrained tiles for VVC [R. Skupin, V. George, K. Suehring, Y. Sanchez, T. Schierl (HHI)]
  • Nal unit level signalling
    • JVET-M0155 AHG12: On tile group identification for VVC [B. Choi, S. Wenger, S. Liu (Tencent)]
    • JVET-M0536 AHG12: On picture-level tiles and sequence-level tiles for VVC [E. Thomas, A. Gabriel (TNO)]
• Wrap around tile (intra)
  • JVET-M0209 AHG12: On tile group configuration [W. Choi, K. Choi, K. Choi (Samsung)]
• Specific tool changes for tile
  • JVET-M0300 CE4-related: HMVP and parallel processing with tiles and tile groups [A. M. Kotra, J. Chen, B. Wang, S. Esenlik, H. Gao (Huawei)]
  • JVET-M0325 CE8-related: CPR with previous CTU availability at frame and tile edge [C. Rosewarne, A. Dorrell (Canon)] – Later withdrawn
• WPP related
  • JVET-M0070 AHG12: Wavefront processing in a tile group [T. Ikai, S. Deshpande, T. Chujoh, E. Sasaki, T. Aono (Sharp)]
  • JVET-M0071 AHG12: Improved parallel processing capability with WPP [Y. Fujimoto, M. Ikeda, T. Suzuki (Sony)]
  • JVET-M0593 Crosscheck of JVET-M0071 (AHG12: Improved parallel processing capability with WPP) [Y. Yasugi, T. Ikai (Sharp)]

The AHG recommended to review the related contributions.