INFORMATION CODING REGARDING A SET OF TRANSFORMATION KERNELS Russian patent published in 2023 - IPC H04N19/13 H04N19/60 

FIELD: image coding technology.

SUBSTANCE: invention relates to image coding technology, specifically, to information coding regarding a set of transformation kernels. The technical result is achieved by the fact that image decoding comprises a step for obtaining a multiple transformation selection (MTS) index and residual information from the bit stream; a step for extracting transformation coefficients for the block regarding residual information and a step for forming residual selection of the block regarding MTS index and transformation coefficient, where the MTS index indicates the set of transformation kernels, which shall be applied to the block, from possible variants of the conversion kernels sets at least one resolution element from the MTS index resolution element string is extracted based on context coding, while context coding is performed based on the increase and decrease values in the context index related to the MTS index, and one increase and decrease value in the context index can be used to context encode the first resolution element from the resolution elements from the resolution element string.

EFFECT: invention improves an image/video compression gain.

9 cl, 13 dwg, 6 tbl