	US 12,425,588 B2
	CCSO with downsampling filters and sample position selection
Han Gao, Palo Alto, CA (US); Xin Zhao, Palo Alto, CA (US); Liang Zhao, Palo Alto, CA (US); Jing Ye, Palo Alto, CA (US); and Shan Liu, Palo Alto, CA (US)
Assigned to TENCENT AMERICA LLC, Palo Alto, CA (US)
Filed by Tencent America LLC, Palo Alto, CA (US)
Filed on May 9, 2024, as Appl. No. 18/660,067.
Claims priority of provisional application 63/543,273, filed on Oct. 9, 2023.
Prior Publication US 2025/0119538 A1, Apr. 10, 2025
Int. Cl. H04N 7/12 (2006.01); H04N 19/117 (2014.01); H04N 19/124 (2014.01); H04N 19/132 (2014.01); H04N 19/159 (2014.01); H04N 19/167 (2014.01); H04N 19/172 (2014.01); H04N 19/184 (2014.01); H04N 19/186 (2014.01); H04N 19/593 (2014.01); H04N 19/70 (2014.01); H04N 19/82 (2014.01)

CPC H04N 19/117 (2014.11) [H04N 19/124 (2014.11); H04N 19/132 (2014.11); H04N 19/159 (2014.11); H04N 19/167 (2014.11); H04N 19/172 (2014.11); H04N 19/184 (2014.11); H04N 19/186 (2014.11); H04N 19/593 (2014.11); H04N 19/70 (2014.11); H04N 19/82 (2014.11)]

23 Claims

1. A method for decoding video data, comprising:

receiving a video bitstream including a current image frame, wherein the video bitstream comprises a first syntax element indicating whether a first sample offset of a first color sample of the current image frame is determined based on one or more luma samples for a cross component sample offset (CCSO) mode;

when the CCSO mode is enabled, generating a set of adapted luma samples including an adapted first luma sample and its adapted neighboring luma samples based on a set of reconstructed luma samples, the set of reconstructed luma samples including a first luma sample that is collocated with the first color sample of the current image frame;

determining the first sample offset of the first color sample based on the adapted first luma sample and the one or more adapted neighboring luma samples; and

reconstructing the current image frame at least by adjusting the first color sample based on the first sample offset.