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16th Meeting: Geneva, October 2019 2019-09-20 10:44
Fix on value ranges of cu_qp_delta_subdiv and cu_chroma_qp_offset_subdiv
Authors: E. Sasaki Sharp Takeshi Chujoh Sharp Tomohiro Ikai Sharp SLA Sharp
Abstract
This contribution proposes a fix on the value range of PPS syntax, cu_qp_delta_subdiv and cu_chroma_qp_offset_subdiv in order not to refer slice level syntaxes. It is proposed to use variables, CtbLog2SizeY and MinCbLog2SizeY specified in SPS level to specify the value range of cu_qp_delta_subdiv and cu_chroma_qp_offset_subdiv.
Meeting Notes
JVET-P0093 Fix on value ranges of cu_qp_delta_subdiv and cu_chroma_qp_offset_subdiv [E. Sasaki, T. Chujoh, T. Ikai (Sharp)]

This contribution proposes a fix on the value range of PPS syntax, cu_qp_delta_subdiv and cu_chroma_qp_offset_subdiv in order not to refer slice level syntaxes. It is proposed to use variables, CtbLog2SizeY and MinCbLog2SizeY specified in SPS level to specify the value range of cu_qp_delta_subdiv and cu_chroma_qp_offset_subdiv.

Related: JVEP-P0267, JVET-P0407

The primary issue is solving the dependency problem. It was argued that it might be desirable to use a narrower range for individual slices, as proposed in JVET-P0267 and JVET-P0407, which obtain the desirable flexibility by moving the signalling to the slice.

References:
JVET-O2001
ARCHIVE v1 :
JVET-P0093.docx
Decisions
The primary issue is solving the dependency problem. It was argued that it might be desirable to use a narrower range for individual slices, as proposed in JVET-P0267 and JVET-P0407, which obtain the desirable flexibility by moving the signalling to the slice.
Citation