US 12,262,019 B2
Adaptive bands for filter offset selection in cross-component sample offset
Samruddhi Yashwant Kahu, Laguna Hills, CA (US); Xin Zhao, San Jose, CA (US); and Shan Liu, San Jose, CA (US)
Assigned to Tencent America LLC, Palo Alto, CA (US)
Filed by Tencent America LLC, Palo Alto, CA (US)
Filed on Sep. 13, 2023, as Appl. No. 18/367,976.
Claims priority of provisional application 63/439,044, filed on Jan. 13, 2023.
Prior Publication US 2024/0244212 A1, Jul. 18, 2024
Int. Cl. H04N 19/00 (2014.01); H04N 19/117 (2014.01); H04N 19/132 (2014.01); H04N 19/169 (2014.01); H04N 19/172 (2014.01); H04N 19/176 (2014.01); H04N 19/186 (2014.01); H04N 19/80 (2014.01)
CPC H04N 19/132 (2014.11) [H04N 19/117 (2014.11); H04N 19/172 (2014.11); H04N 19/176 (2014.11); H04N 19/186 (2014.11); H04N 19/1887 (2014.11); H04N 19/80 (2014.11)] 20 Claims
OG exemplary drawing
 
1. A method of video processing in a decoder, comprising:
receiving coded information from a coded video bitstream, the coded information being indicative of applying cross-component sample offset (CCSO) with adaptive bands;
determining at least a first band width for a first band and a second band width for a second band, the first band width being different from the second band width;
determining, for a current block in a current picture, at least a first offset associated with the first band and a second offset associated with the second band;
categorizing reconstructed samples of a first color component in the current block into at least the first band and the second band based on the first band width of the first band and the second band width of the second band, the first band comprising first reconstructed samples of the first color component and the second band comprising second reconstructed samples of the first color component, the first reconstructed samples of the first color component collocating with first reconstructed samples of a second color component in the current block, the second reconstructed samples of the first color component collocating with second reconstructed samples of the second color component in the current block; and
applying at least the first offset to the first reconstructed samples of the second color component and the second offset to the second reconstructed samples of the second color component to generate CCSO compensated samples of the second color component.