US 12,219,128 B2
Mixed-model cross-component prediction mode
Xin Zhao, Santa Clara, CA (US); Guichun Li, San Jose, CA (US); Lien-Fei Chen, Hsinchu (TW); 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 Nov. 7, 2022, as Appl. No. 17/982,189.
Claims priority of provisional application 63/388,117, filed on Jul. 11, 2022.
Prior Publication US 2024/0015279 A1, Jan. 11, 2024
Int. Cl. H04N 19/105 (2014.01); H04N 19/132 (2014.01); H04N 19/176 (2014.01); H04N 19/186 (2014.01); H04N 19/46 (2014.01); H04N 19/70 (2014.01)
CPC H04N 19/105 (2014.11) [H04N 19/132 (2014.11); H04N 19/176 (2014.11); H04N 19/186 (2014.11); H04N 19/46 (2014.11); H04N 19/70 (2014.11)] 20 Claims
OG exemplary drawing
 
1. A method of video decoding performed in a video decoder, the method comprising:
receiving coded information of a current chroma block and a luma block that is collocated with the current chroma block;
determining a feature value based on at least one of (i) neighboring reconstructed chroma samples of the current chroma block and (ii) neighboring reconstructed luma samples of the luma block that is collocated with the current chroma block;
grouping chroma samples of the current chroma block and luma samples of the luma block that is collocated with the current chroma block into a plurality of groups based on a threshold of the feature value, each of the plurality of groups including a respective chroma sample and a respective luma sample;
determining a respective cross-component prediction mode for each of the plurality of groups by comparing the respective chroma sample and the respective luma sample of each respective group to the determined feature value; and
reconstructing the current chroma block based on the determined cross-component prediction modes of the plurality of groups,
wherein a type of cross-component prediction mode of the determined respective cross-component prediction mode for each of the plurality of groups is different.