US 12,244,819 B2
Chroma quantization parameter in video coding
Weijia Zhu, San Diego, CA (US); Li Zhang, San Diego, CA (US); and Jizheng Xu, San Diego, CA (US)
Assigned to Bytedance Inc., Los Angeles, CA (US)
Filed by Bytedance Inc., Los Angeles, CA (US)
Filed on Mar. 14, 2022, as Appl. No. 17/694,305.
Application 17/694,305 is a continuation of application No. PCT/US2020/050649, filed on Sep. 14, 2020.
Claims priority of application No. PCT/CN2019/105831 (WO), filed on Sep. 14, 2019.
Prior Publication US 2022/0210448 A1, Jun. 30, 2022
Int. Cl. H04N 19/70 (2014.01); H04N 19/117 (2014.01); H04N 19/124 (2014.01); H04N 19/132 (2014.01); H04N 19/14 (2014.01); H04N 19/174 (2014.01); H04N 19/176 (2014.01); H04N 19/186 (2014.01); H04N 19/196 (2014.01); H04N 19/86 (2014.01)
CPC H04N 19/14 (2014.11) [H04N 19/117 (2014.11); H04N 19/124 (2014.11); H04N 19/132 (2014.11); H04N 19/174 (2014.11); H04N 19/176 (2014.11); H04N 19/186 (2014.11); H04N 19/196 (2014.11); H04N 19/70 (2014.11); H04N 19/86 (2014.11)] 20 Claims
OG exemplary drawing
 
1. A method of processing video data, comprising:
determining, for a conversion between a current block of a video and a bitstream of the video, whether to enable usage of a block level chroma quantization parameter offset for the current block according to a first enable flag cu_chroma_qp_offset_enabled_flag at a slice level, wherein the first enable flag indicates whether to enable usage of block level chroma quantization parameter offsets for blocks in a slice; and
performing the conversion based on the determining,
wherein whether the first enable flag is included in the bitstream at the slice level is based on a value of a second enable flag at a picture level that indicates whether block level chroma quantization parameter offsets are allowed,
wherein the second enable flag is included in a picture parameter set,
wherein in response to the value of the second enable flag indicating that block level chroma quantization parameter offsets are allowed, the first enable flag is included in the bitstream for indicating whether to enable usage of the block level chroma quantization parameter offset for the current block, and
wherein in response to the value of the second enable flag indicating that block level chroma quantization parameter offsets are disallowed, the first enable flag is not included in the bitstream.