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19th Meeting: by teleconference, June 2020 2020-06-23 14:59
AHG9: On generalized cubemap projection SEI message
Authors: Ya-Hsuan Lee MediaTek Jian-Liang Lin MediaTek Y.-J. Chen MediaTek C.-C. Ju MediaTek
Abstract
This document is Draft 4 of a standard that specifies the syntax and semantics of video usability information (VUI) parameters and supplemental enhancement information (SEI) messages for use with coded video bitstreams. The VUI parameters and SEI messages defined in this draft standard may be conveyed within coded video bitstreams in a manner specified in a video coding specification or may be conveyed by other means as determined by the specifications for systems that make use of such coded video bitstreams. This draft standard is particularly intended for use with coded video bitstreams as specified by Rec. ITU-T H.VVC ISO/IEC 23090-3, although it is drafted in a manner intended to be sufficiently generic that it may also be used with other types of coded video bitstreams.
Meeting Notes
JVET-S0172 AHG9: On generalized cubemap projection SEI message [Y.-H. Lee, J.-L. Lin, Y.-J. Chen, C.-C. Ju (MediaTek)]

This contribution was discussed in the HLS AHG pre-meeting at 1900 on 20 June.

This proposes the following modifications and constraints related to the generalized cubemap projection SEI message:

  1. Add a condition check of gcmp_guard_band_flag when deriving gcmpGuardBandSamples to prevent from accessing an uninitialized variable.
  2. Add constraints on gcmp_face_index[ i ] and gcmp_face_rotation[ i ] for the hemisphere cubemap projection to guarantee that the four half faces are the ones connecting to the full face and can represent 180°×180° omnidirectional image/video. (The “if” part of the “otherwise” should be removed.)
  3. Include an offset the remapping of sample locations on the half faces of the hemisphere cubemap projection.

AHG Recommendation (bug fix and sensibility constraints): Adopt.

It was asked whether each half-height / half-width is required to be an integer multiple of 2 in the 4:2:0 / 4:2:2 cases, to avoid half-chroma samples.

Offline work by the proponent was requested to establish this constraint.

This was further discussed in the main JVET meeting at 1430 on 25 June (chaired by GJS).

A -v2 version of the contribution was provided that includes the requested constraint. It was commented that although the spirit of the constraint is clear in the provided text, it may be better to derive specific variables and constrain their values rather than to use verbal expressions such as “the width of each face”.

Editor action item: The contributor and...

References:
JVET-N1001 JVET-P0337 JVET-P0359 JVET-P0450 JVET-P0462 JVET-P0597 JVET-Q0042 JVET-Q0343 JVET-Q0818 JVET-R0090 JVET-R2001
Cited:
JVET-S0017 JVET-S2007 JVET-T0002 JVET-T0003 JVET-U0003
ARCHIVE v2 :
JVET-S0172-v2.docx JVET-S0172_spec.docx
Decisions
Editor action item: The contributor and editor were asked to consider the above suggestion in the text finalization.
Citation
21st Meeting: by teleconference, January 2021 2021-01-06 06:21
JVET AHG report: Test model software development (AHG3)
Authors: F. Bossen Xinwei Li Karsten Sühring Karl Sharman Vadim Seregin Alexis Tourapis Jens-Rainer Ohm
Abstract
This report summarizes the activities of the AhG3 on Test model software development that has taken place between the 20th and 21st JVET meetings.
Meeting Notes
JVET-U0003 JVET AHG report: Test model software development (AHG3) [F. Bossen, X. Li, K. Sühring, K. Sharman, V. Seregin, A. Tourapis]

The mandates given to the AHG were:

  • Coordinate development of test model (VTM, HM, SCM, SHM, HTM, MFC, MFCD, JM, JSVM, JMVM, 3DV-ATM, and HDRTools) software and associated configuration files.
  • Produce documentation of software usage for distribution with the software.
  • Enable software support for recently standardized additional SEI messages.
  • Discuss and make recommendations on the software development process.
  • Propose improvements to the guideline document for developments of the test model software.
  • Perform tests of test model behaviour using common test conditions.
  • Suggest configuration files for additional testing of tools.
  • Investigate how to minimize the number of separate codebases maintained for group reference software.
  • Coordinate with AHG on Draft text and test model algorithm description editing (AHG2) to identify any mismatches between software and text, and make further updates and cleanups to the software as appropriate.
  • Coordinate with AHG6 for integration with 360lib software.

The software model versions prior to the start of the meeting were:

  • VTM 11.0 (Nov. 2020)
  • HM-16.22 (Jul. 2020)
  • HM-16.21+SCM-8.8 (Mar. 2020)
  • SHM 12.4 (Jan. 2018) [svn]
  • HTM 16.3 (Jul. 2018) [svn]
  • JM 19.0
  • JSVM 9.19.15
  • JMVC 8.5
  • 3DV ATM 15.0 (no version history)
  • HDRTools 0.19.1 (Sep. 2019)

Software for MFC and MFCD is only available in the version published by ITU-T and ISO/IEC. It is planned to create repositories with the latest versions available in ITU-T H.264.2 (02/2016)....

References:
JCTVC-AJ0028 JCTVC-AM0023 JVET-Q0112 JVET-Q0154 JVET-Q0164 JVET-Q0402 JVET-Q0443 JVET-R0046 JVET-R0065 JVET-R0068 JVET-R0070 JVET-R0073 JVET-R0178 JVET-R0191 JVET-R0193 JVET-R0221 JVET-R0222 JVET-R0227 JVET-R0249 JVET-R0251 JVET-R0255 JVET-R0264 JVET-R0266 JVET-R0481 JVET-S0042 JVET-S0047 JVET-S0050 JVET-S0077 JVET-S0078 JVET-S0084 JVET-S0090 JVET-S0095 JVET-S0096 JVET-S0097 JVET-S0100 JVET-S0102 JVET-S0110 JVET-S0115 JVET-S0121 JVET-S0138 JVET-S0139 JVET-S0140 JVET-S0141 JVET-S0142 JVET-S0144 JVET-S0145 JVET-S0147 JVET-S0154 JVET-S0158 JVET-S0159 JVET-S0162 JVET-S0163 JVET-S0171 JVET-S0172 JVET-S0173 JVET-S0174 JVET-S0175 JVET-S0176 JVET-S0196 JVET-S0202 JVET-S0208 JVET-S0210 JVET-S0211 JVET-S0212 JVET-S0219 JVET-S0227 JVET-S0256 JVET-T0050 JVET-T0053 JVET-T0055 JVET-T0061 JVET-T0062 JVET-T0064 JVET-T0065 JVET-T0091 JVET-T2018
ARCHIVE v1 :
._hm-16.22_vs_VTM-11.0.xlsm ._JVET-U0003-v1.docx ._VTM-10.2_vs_VTM-11.0.xlsm hm-16.22_vs_VTM-11.0.xlsm JVET-U0003-v1.docx VTM-10.2_vs_VTM-11.0.xlsm
Decisions
noted
It is noted that scalable bitstreams can be generated (including spatial scalablity and multiview), but it is not known how efficient those are.
Citation
19th Meeting: by teleconference, June 2020 2020-08-05 19:16
Technologies under consideration for VSEI
Authors: Jill Boyce Ye-Kui Wang Gary Sullivan
Abstract
This document provides draft text of Technologies under Consideration for VSEI. It contains SEI messages proposed in input contributions JVET-S0107 “AHG9/AHG12: Recommended multi-layer composite picture SEI messages”, JVET-S0213 “AHG8/AHG9: Refinement of proposed positioning information SEI message of output independent layers with example bitstreams”, and JVET-S0269 "AHG17/AHG9: SEI manifest and SEI prefix indication SEI messages".
Meeting Notes
JVET-S2017 Technologies under consideration for VSEI [J. Boyce, Y.-K. Wang] (2020-07-31)

Future meeting plans, expressions of thanks, and closing of the meeting

Future meeting plans were established according to the following guidelines:

  • Meeting under ITU-T SG 16 auspices when it meets (ordinarily starting meetings on the Wednesday of the first week and closing it on the Wednesday of the second week of the SG 16 meeting – a total of 8 meeting days), and
  • Otherwise meeting under ISO/IEC JTC 1/SC 29/WG 11 auspices (or its successor) when it meets (ordinarily starting meetings on the Friday prior to such meetings and closing it at lunchtime on the last day of the WG 11 meeting – a total of 7.5 meeting days).

In cases where an exceptionally high workload is expected for a meeting, an earlier starting date may be defined.

Some specific future meeting plans (to be confirmed) were established as follows:

  • Wed. 7 – Fri. 9 and Mon 12 – Friday 16 October 2020, 20th meeting under WG 11 auspices as a teleconference (7.5 meeting days).
  • Fri. 8 – Fri. 15 January 2021, 21st meeting under WG 11 auspices in Capetown, ZA.
  • Wed. 21 – Wed. 28 April 2021, 22nd meeting under ITU-T auspices in Geneva, CH.
  • Fri. 9 – Fri. 16 July 2021, 23rd meeting under WG 11 auspices in Prague, CZ.

The agreed document deadline for the 20th JVET meeting was planned to be Wednesday 30 Sep. 2020.

Vittorio Baroncini, Andrew Segall, Mathias Wien, and Yan Ye were thanked for their efforts in further developing the VVC verification test plan and procedure. GBTech was thanked for kindly providing resources and conducting the dry...

References:
JVET-S0107 JVET-S0213 JVET-S0269
Cited:
JVET-T0001 JVET-T0009 JVET-T0080
ARCHIVE v1 :
JVET-S2017.docx
Decisions
_________________
Citation
19th Meeting: by teleconference, June 2020 2020-06-22 15:45
JVET AHG report: 360° video coding tools, software and test conditions (AHG6)
Authors: Jill Boyce Yong He Kiho Choi Jian-Liang Lin Y. Ye Jens-Rainer Ohm

Abstract not available in document

Meeting Notes
JVET-S0006 JVET AHG report: 360° video coding tools, software and test conditions (AHG6) [J. Boyce, Y. He, K. Choi, J.-L. Lin, Y. Ye] The document summarizes activities on 360-degree video content conversion software development between the 18th (15–24 Apr. 2020) and the 19th (22 June – 1 July 2020) JVET meetings. There was no update for 360Lib software (latest version 360Lib-10.1). Based on discussions regarding preparation of 360 video content for the verification test, a request was made to enable the GCMP and ERP SEI message information within bitstreams to be used for creating configuration files for 360 format conversion and viewport extraction using 360Lib. Bytedance is planning to provide the patch for the VTM. The 360Lib software is developed using a Subversion repository located at: https://jvet.hhi.fraunhofer.de/svn/svn_360Lib/ The released version of 360Lib-10.1 can be found...
ARCHIVE v2 :
JVET-S0006-v2.doc
Decisions
for information
Software work for the SEI messages was reported to be happening in the background. It was requested for information about this effort to be provided in a late contribution.
Citation
19th Meeting: by teleconference, June 2020 2020-06-22 03:56
JVET AHG report: SEI message studies (AHG17)
Authors: Sean McCarthy Jill Boyce Philippe de Lagrange Ajay Luthra Alexis Tourapis Ye-Kui Wang S. Wenger Jens-Rainer Ohm
Abstract
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).
Meeting Notes
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...
References:
JVET-S0051 JVET-S0099 JVET-S0107 JVET-S0108 JVET-S0137 JVET-S0172 JVET-S0175 JVET-S0176 JVET-S0177 JVET-S0178 JVET-S0213 JVET-S0214 JVET-S0237
ARCHIVE v1 :
JVET-S0017-v1.docx
Decisions
noted
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. Project development (22) General (2)
Citation
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