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公开(公告)号:US20230403397A1
公开(公告)日:2023-12-14
申请号:US18325704
申请日:2023-05-30
发明人: Xinwei LI , Yan YE , Ru-ling LIAO , Jie CHEN
IPC分类号: H04N19/132 , H04N19/105 , H04N19/186 , H04N19/176 , H04N19/70
CPC分类号: H04N19/132 , H04N19/105 , H04N19/186 , H04N19/176 , H04N19/70
摘要: During video encoding or decoding, cross-component prediction can be used to predict a chroma sample from collocated reconstructed luma samples. The prediction can be based on a gradient of the collocated reconstructed luma samples, a down-sampled value of the collocated reconstructed luma samples, or a combination thereof. An exemplary method includes: determining a first value associated with a chroma sample, by applying a first gradient pattern to reconstructed values of a first plurality of luma samples; determining a second value associated with the chroma sample, by applying a down-sampling filter to reconstructed values of a second plurality of luma samples; and predicting the chroma sample based on the first value and the second value.