JVET-S0017 JVET AHG report: SEI message studies (AHG17) [S. McCarthy, J. Boyce, P. de Lagrange, A. Luthra, A. Tourapis, Y.-K. Wang, S. Wenger]Formularende
This document summarizes the activity of AHG17: SEI message studies between the 18th JVET Meeting (teleconference, 15-24 April 2020) and the 19th JVET Meeting (teleconference, 22 June – 01 July 2020).
The following contributions were identified as related to AHG17. It is noted that none of the contributions were identified as AHG17. Instead, all were identified as one or more of the following: AHG 8, 9, and 12.
Contributions related to the VVC draft specification
- JVET-S0099, AHG12: SEI message handling in subpicture extraction [R. Skupin, Y. Sanchez, K. Suehring (HHI), V. Drugeon (Panasonic)]
- JVET-S0175, AHG9: Cleanup of picture rate info and HRD operation without timing SEI messages [Y. Sanchez, R. Skupin, K. Suehring, T. Schierl (HHI)]
- JVET-S0176, AHG9: On the subpicture level information SEI message [Y.-K. Wang, Z. Deng (Bytedance)]
- JVET-S0177,AHG9: On the scalable nesting SEI message [Y.-K. Wang, Z. Deng (Bytedance)]
- JVET-S0178, AHG9: General SEI semantics and constraints [Y.-K. Wang, Z. Deng (Bytedance)]
Contributions related to ITU-T H.SEI | ISO/IEC 23002-7
Modification of existing SEI messages
- JVET-S0172, AHG9: On generalized cubemap projection SEI message [Y.-H. Lee, J.-L. Lin, Y.-J. Chen, C.-C. Ju (MediaTek)]
Proposed new SEI messages
- JVET-S0051, AHG9: Digital signature SEI message [J. Xu, Y.-K. Wang, L. Zhang, K. Zhang (Bytedance)]
- JVET-S0107, AHG9/AHG12: Recommended multi-layer composite picture SEI messages, [J. Boyce (Intel)]
- JVET-S0108, AHG8/AHG9: Refinement of proposed positioning information SEI message of output independent layers [E. Thomas (TNO)]
- JVET-S0213, AHG8/AHG9: Refinement of proposed positioning information SEI message of output independent layers with example bitstreams [E. Thomas (TNO)]
- JVET-S0214, AHG8/AHG9: Updates on the implementation of multi-layer decoding and output independent layer arrangement in VTM [E. Thomas (TNO)]
Activities
Email activities
The regular JVET e-mail reflector was used for discussions (jvet@lists.rwth-aachen.de) with [AHG17] in message headers. There were no emails besides the AHG kickoff message sent to the JVET reflector during the AHG period.
Activities related to 27-28 May 2020 HLS AHG meeting
The following contributions were identified as related to hypothetical reference decoder (HRD) (Section 3.1.8 in the Agenda and [Draft] reports of the 27-28 May 2020 HLS AHG pre-meeting (JVET-S0137) and of the 19-21 June HLS AHG pre-meeting (JVET-S0237)). JVET-S0175 (aspects 1,2, and 3) was discussed during the 19-21 June pre-meeting.
- JVET-S0099 AHG12: SEI message handling in subpicture extraction [R. Skupin, Y. Sanchez, K. Suehring (HHI), V. Drugeon (Panasonic)]
- JVET-S0175 AHG9: Cleanup of picture rate info and HRD operation without timing SEI messages [Y. Sanchez, R. Skupin, K. Suehring, T. Schierl (HHI)]
- JVET-S0176 AHG9: On the subpicture level information SEI message [Y.-K. Wang, Z. Deng (Bytedance)]
- JVET-S0177 AHG9: On the scalable nesting SEI message [Y.-K. Wang, Z. Deng (Bytedance)]
- JVET-S0178 AHG9: General SEI semantics and constraints [Y.-K. Wang, Z. Deng (Bytedance)]
The following contributions were identified as related to DCI, VUI, and SEI (Section 3.1.9 in the Agenda and [Draft] reports of the 27-28 May 2020 HLS AHG pre-meeting (JVET-S0137) and of the 19-21 June HLS AHG pre-meeting (JVET-S0237)). JVET-S0172 was discussed during the 19-21 June pre-meeting.
- JVET-S0051 AHG9: Digital signature SEI message [J. Xu, Y.-K. Wang, L. Zhang, K. Zhang (Bytedance)]
- JVET-S0107 AHG9/AHG12: Recommended multi-layer composite picture SEI messages [J. Boyce (Intel)]
- JVET-S0108 AHG8/AHG9: Refinement of proposed positioning information SEI message of output independent layers [E. Thomas (TNO)]
- JVET-S0172 AHG9: On generalized cubemap projection SEI message [Y.-H. Lee, J.-L. Lin, Y.-J. Chen, C.-C. Ju (MediaTek)]
- JVET-S0213 AHG8/AHG9: Refinement of proposed positioning information SEI message of output independent layers with example bitstreams [E. Thomas (TNO)]
- JVET-S0214 AHG8/AHG9: Updates on the implementation of multi-layer decoding and output independent layer arrangement in VTM [E. Thomas (TNO)]
The AHG recommended to:
- Review all related contributions;
- Continue SEI messages studies.
It was remarked that we should encourage participants to remember to identify AHG17 (or what it will become) in titles when submitting related contributions.
There was further discussion of how future SEI messages would be specified – as drafted, there needs to be an impact on the VVC spec (and each other potential video coding spec) for each SEI message added to the SEI spec. Further study was expected to consider an alternative approach. It was noted that we have been implementing SEI messages in the VTM software (not in some other software).
AHG report reviews were completed at the end of the second JVET meeting session, at 1720 Monday 22 June.