METHOD FOR IMAGE DECODING BASED ON MUTUAL-COMPONENT LINEAR MODEL PREDICTION IN IMAGE CODING SYSTEM AND DEVICE FOR IT Russian patent published in 2022 - IPC H04N19/186 H04N19/11 

FIELD: coding and decoding.

SUBSTANCE: invention relates to the field of coding and decoding, in particular to a device and method for decoding video based on the prediction of a mutual-component linear model (CCLM) in a video coding system. A video decoding method is proposed, which is performed by a decoding apparatus and includes the steps of: extracting one of the plurality of CCLM prediction modes as the CCLM prediction mode of the current chrominance block; extracting the number of adjacent chroma samples of the current chroma block based on the CCLM prediction mode of the current chroma block, the size of the current chroma block, and a specific value; extracting adjacent chromaticity samples in the number of samples; calculating CCLM parameters based on adjacent chrominance samples and adjacent luma samples after downsampling; extracting prediction samples for the current chrominance block based on the CCLM parameters and downsampled luminance samples, and generating reconstructed samples for the current chrominance block based on the prediction samples, wherein the specific value is extracted as 2.

EFFECT: high-performance image compression for efficient transmission, storage, and reproduction of high-resolution, high-quality image information.

10 cl, 42 dwg