US 12,425,631 B2
Adaptive parameter selection for cross-component prediction in image and video compression
Xiaozhong Xu, Shenzhen (CN); 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 May 30, 2024, as Appl. No. 18/678,979.
Application 18/678,979 is a continuation of application No. 17/976,556, filed on Oct. 28, 2022, granted, now 12,041,260.
Claims priority of provisional application 63/305,159, filed on Jan. 31, 2022.
Prior Publication US 2024/0323423 A1, Sep. 26, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/50 (2014.01); H04N 19/176 (2014.01); H04N 19/186 (2014.01); H04N 19/44 (2014.01)
CPC H04N 19/50 (2014.11) [H04N 19/176 (2014.11); H04N 19/186 (2014.11); H04N 19/44 (2014.11)] 20 Claims
OG exemplary drawing
 
1. A method of video processing in an encoder, comprising:
for a first region in a chroma block in a current picture,
updating an offset parameter in a cross-component linear model (CCLM) mode based on a first subset of reconstructed samples in a luma block that is collocated with the chroma block in the current picture, the first subset of the reconstructed samples not including one or more reconstructed samples in the luma block;
updating a slope parameter in the CCLM mode based on a second subset of the reconstructed samples in the luma block; and
encoding the first region in the chroma block based on the updated offset parameter and the updated slope parameter using the CCLM mode.