IMAGE CODING METHOD BASED ON TRANSFORMATION AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2023 - IPC H04N19/60 H04N19/186 H04N19/122 

FIELD: image coding.

SUBSTANCE: image coding based on a transformation in an image coding system The method for image coding/decoding, which comprises the steps of: deriving residual discrete samples (fetches) by applying at least one of LFNST or MTS to the transform coefficients; generating a reconstructed snapshot based on residual discrete samples, wherein LFNST is performed based on the LFNST index indicating the LFNST core, MTS is performed based on the MTS index indicating the MTS core, parsing against the MTS index is performed based on the color index of the current block, which is a luma component, and parsing against the LFNST index is performed regardless of the color index of the current block.

EFFECT: increasing the coding efficiency.

13 cl, 23 dwg, 20 tbl