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17th Meeting: Brussels, January 2020 2020-01-06 01:28
AHG15: history of local chroma QP offsets
Authors: Philippe de Lagrange InterDigital
Abstract
This contribution is related to JVET-Q0484, which is questioning the relevance of having flags at both PPS and Slice Header to enable local chroma QP offsets, contrary to local luma QP offsets which are enabled at PPS level only.
Meeting Notes
JVET-Q0576 AHG15: History of local chroma QP offsets [P. de Lagrange (InterDigital)] [late]

This contribution is related to JVET-Q0484, which is questioning the relevance of having flags at both PPS and Slice Header to enable local chroma QP offsets, contrary to local luma QP offsets which are enabled at PPS level only.

This contribution reports that the VVC draft 7 is aligned with HEVC range extension for this aspect, and tries to answer the question of when and why this was adopted in HEVC, tracing back to the original proposal JCTVC-O0044.

See the notes under the plenary of Thursday 16 January in section 11.5.

References:
JCTVC-O0044 JCTVC-O1000 JCTVC-Q1005 JVET-O0767 JVET-O1168 JVET-P2001 JVET-Q0484
Cited:
JVET-Q0002 JVET-Q0015
PATENTS:
WO/2025/002768 0.34 20250373855 0.33 WO/2024/151874 0.32 WO/2025/042869 0.31 20240314339 0.30 20220394303 0.28 20240323444 0.27 20260059111 0.26
ARCHIVE v1 :
JVET-Q0576.docx
Decisions
See the notes under the plenary of Thursday 16 January in section 11.5.
Citation