US 12,155,851 B2
Chroma coding enhancement in cross-component sample adaptive offset
Che-Wei Kuo, Beijing (CN); Xiaoyu Xiu, Beijing (CN); Wei Chen, Beijing (CN); Xianglin Wang, Beijing (CN); Yi-Wen Chen, Beijing (CN); Tsung-Chuan Ma, Beijing (CN); Hong-Jheng Jhu, Bejing (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 Feb. 23, 2023, as Appl. No. 18/173,335.
Application 18/173,335 is a continuation of application No. PCT/US2021/047548, filed on Aug. 25, 2021.
Claims priority of provisional application 63/070,725, filed on Aug. 26, 2020.
Prior Publication US 2023/0199209 A1, Jun. 22, 2023
Int. Cl. H04N 7/12 (2006.01); H04N 19/117 (2014.01); H04N 19/132 (2014.01); H04N 19/186 (2014.01); H04N 19/189 (2014.01); H04N 19/44 (2014.01); H04N 19/635 (2014.01); H04N 19/82 (2014.01)
CPC H04N 19/44 (2014.11) [H04N 19/117 (2014.11); H04N 19/132 (2014.11); H04N 19/186 (2014.11); H04N 19/189 (2014.11); H04N 19/635 (2014.11); H04N 19/82 (2014.11)] 20 Claims
OG exemplary drawing
 
1. A method of decoding video signal, comprising:
receiving, from the video signal, a picture frame that includes a first component and a second component;
receiving, from the video signal, a plurality of sample offsets associated with the second component;
obtaining samples of the first component before a first in-loop filter module is used;
obtaining samples of the second component after a second in-loop filter module is used;
determining a class index for the second component from one or more samples of the first component relative to a sample of the second component;
selecting a sample offset from the plurality of sample offsets for the second component according to the class index; and
obtaining modified samples of the second component based on the sample offset that was selected.