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18th Meeting: Teleconference, April 2020 2020-04-03 22:17
AHG9: APS, LMCS, deblocking and PPS constraints
Authors: Nan Hu Qualcomm Vadim Seregin Qualcomm Muhammed Coban Qualcomm Marta Karczewicz Qualcomm
Abstract
This contribution proposes to add a constraint for APS type based on the enabled tools in SPS. If a tool, which uses an APS, is disabled then the APS with the corresponding APS type should not be present in a bitstream. Secondly, the contribution proposes to add a constraint for CCALF filters in an ALF APS based on CCALF SPS enable flag. If CCALF is disabled in SPS, an ALF_APS cannot contain any CCALF filters. Thirdly, the contribution proposes to add constraints for chroma deblocking and chroma LMCS scaling parameter for monochrome content, similar constraints are already in place for other chroma related tools and syntax elements. At last, as another option, to decouple constraints in both PPS and APS from SPS, ChromaArrayType and BitDepth constraints are removed from both PPS and APS semantics.
Meeting Notes
JVET-R0232 AHG9: APS, LMCS, deblocking and PPS constraints [N. Hu, V. Seregin, M. Coban, M. Karczewicz (Qualcomm)]

Deblocking control signalling - other aspects (5)

Discussion began here with AHG Session 1.8 on Tuesday 7 April at 2320 UTC (chaired by GJS & YKW).

JVET-R0232 AHG9: APS, LMCS, deblocking and PPS constraints [N. Hu, V. Seregin, M. Coban, M. Karczewicz (Qualcomm)]

All aspects excluding the deblocking aspect of this contribution belong this this category.

Cited:
JVET-R0338 JVET-R0404 JVET-R2001 JVET-S0002 JVET-S0003 JVET-S0052 JVET-S0085 JVET-S0123 JVET-S0152 JVET-S0161 JVET-S0171 JVET-S0187 JVET-S0229 JVET-S0248 JVET-S0256 JVET-S0266 JVET-S0269 JVET-S2001
PATENTS:
20200389655 0.92 20200344473 0.92 WO/2020/219269 0.92 20210314579 0.90 20210014515 0.90 3997878 0.90 WO/2021/007301 0.90 WO/2021/202905 0.70
ARCHIVE v2 :
JVET-R0232-v1.docx
Decisions
Discussion began here with AHG Session 1.8 on Tuesday 7 April at 2320 UTC (chaired by GJS & YKW).
All aspects excluding the deblocking aspect of this contribution belong this this category.
Citation