US 12,075,047 B2
Methods and apparatus of video coding in 4:4:4 color format
Xiaoyu Xiu, Beijing (CN); Yi-Wen Chen, Beijing (CN); Tsung-Chuan Ma, Beijing (CN); Hong-Jheng Jhu, Beijing (CN); Wei Chen, Beijing (CN); Che-Wei Kuo, Beijing (CN); Xianglin Wang, Beijing (CN); and Bing Yu, Beijing (CN)
Assigned to BEIJING DAJIA INTERNET INFORMATION TECHNOLOGY CO., LTD., Beijing (CN)
Filed by BEIJING DAJIA INTERNET INFORMATION TECHNOLOGY CO., LTD., Beijing (CN)
Filed on Dec. 12, 2022, as Appl. No. 18/064,831.
Application 18/064,831 is a continuation of application No. PCT/US2021/037197, filed on Jun. 14, 2021.
Claims priority of provisional application 63/038,692, filed on Jun. 12, 2020.
Prior Publication US 2023/0109849 A1, Apr. 13, 2023
Int. Cl. H04N 19/12 (2014.01); H04N 19/124 (2014.01); H04N 19/132 (2014.01); H04N 19/18 (2014.01); H04N 19/186 (2014.01); H04N 19/30 (2014.01); H04N 19/60 (2014.01); H04N 19/70 (2014.01)
CPC H04N 19/12 (2014.11) [H04N 19/124 (2014.11); H04N 19/132 (2014.11); H04N 19/18 (2014.11); H04N 19/186 (2014.11); H04N 19/30 (2014.11); H04N 19/60 (2014.11); H04N 19/70 (2014.11)] 20 Claims
OG exemplary drawing
 
1. A method of video decoding, comprising:
obtaining, from a bitstream, a plurality of syntax elements associated with a coding unit, wherein the syntax elements include a first coded block flag (CBF) for residual samples of a first chroma component of the coding unit, a second CBF for residual samples of a second chroma component of the coding unit, and a third syntax element indicating whether adaptive color transform (ACT) is applied to the coding unit or not;
determining whether to perform chroma residual scaling to residual samples of at least one of the first and second chroma components according to at least one of the first CBF, the second CBF, and the third syntax element; and
in accordance with a determination to perform the chroma residual scaling to the residual samples of the at least one of the first and second chroma components,
scaling the residual samples of the at least one of the first and second chroma components based on a corresponding scaling parameter; and
reconstructing chroma samples of the coding unit using chroma residual samples after scaling.