JVET-T0022 JCT-VC AHG report: Test model editing and errata reporting (AHG2) [B. Bross, C. Rosewarne, J.-R. Ohm, K. Sharman, G. J. Sullivan, A. Tourapis, Y.-K. Wang]
This AHG report was discussed at 0535 Friday 9 October 2020 (chaired by GJS & JRO).
This document reports the work of the JCT-VC ad hoc group on (HEVC and AVC) test model editing and errata reporting (AHG2) between the 40th JCT-VC meeting by teleconference (Jun. 2020) and the 20th JVET meeting by teleconference.
JCT-VC output documents
- JCTVC-AN1002 High Efficiency Video Coding (HEVC) Test Model 16 (HM 16) Encoder Description Update 14
The HM encoder description document was revised to include the GOP size 8 low delay structure.
- JCTVC-AN1004 Errata report items for HEVC, AVC, Video CICP, and CP usage TR
All errata items noted in the meeting minutes of the 40th JCT-VC meeting had been integrated into the errata report.
JVET input documents related to JCTVC AHG2
- JVET-T0048 On the syntax design for extending SEI messages and VUI for HEVC, VVC and VSEI [Bytedance, Microsoft]
- JVET-T0054 Some errata items for HEVC and AVC (Bytedance, Apple)
- JVET-T0075 AHG9: Errata and editorial clarifications for AVC and HEVC film grain characteristics SEI message semantics (Dolby)
Text ticket review
This table is reproduced from the previous AHG2 report (JCTVC-AN0002).
Ticket | Summary | Status |
1507 | Duplicate syntax element ctxInc assignments in Table 9-48. | Confirmed present in H.265 (11/19) (new ticket, filed 2020-04-18). |
1505 | Relates to semantics of AUs appearing after an ‘end of sequence’ or ‘end of bitstream’ NAL unit. | See previous meeting notes regarding JCTVC-AM0002. |
1504 | Small typos in profile_tier_level syntax in tabular form (7.3.3) | Aspect 1: Extra ‘)’ is still present in H.265 (11/19) Aspect 2: sub_layer_profile_compatibility_flag missing[ i ] issue confirmed fixed in H.265 (11/19). |
1500 | typo in equation (8-69), (8-70) (palette_transpose_flag not transposing) | Confirmed present in H.265 (11/19). |
1498 | Typos in Table 9-43 (for palette_run_suffix PalletMaxRun should be PalletMaxRunMinus1) | Confirmed present in H.265 (11/19). |
1491 | duplicate invocation of 9.3.4.3 arithmetic decoding process (invoked both in 9.3.4.1 and also in 9.3.4.2). | Confirmed present in H.265 (11/19) – confirm whether action is needed) |
1427 | Eqns (8-185) and (8-187) could be removed as editorial cleanup. | The ticket is marked as enhancement and note the equation numbers are updated since the ticket was filed. |
Decision: It was confirmed that these should be included in JVET-T1004.
The following ticket was closed previously but was marked for further study in JCTVC-AN1004:
1372 | IntraPredModeY is not set to be DC for palette and IntraBC mode. | (Included in JCTVC-AN1004) Not present in JCTVC-W1005. |
It was agreed that #1372 was an obsolete report and does not need to be further tracked.
The recommendations of the HEVC test model editing and errata reporting JCT-VC AHG were for JVET to:
- Encourage the use of the issue tracker to report issues with the text of both the HEVC specification and the encoder description.
- Review the above-identified errata reports.
- Confirm resolutions of open tickets (if any) in the issue tracker and close them.