FIELD: data processing.
SUBSTANCE: group of inventions relates to encoding and decoding images. Current block intra prediction mode is determined, initial sample for current block intra prediction is determined, determining a predetermined matrix from a plurality of previously stored matrix groups based on the intra prediction mode and performing a prediction stage of the current block based on the initial sample and the matrix.
EFFECT: high efficiency of encoding and decoding images.
10 cl, 10 dwg, 3 tbl
