FIELD: physics.
SUBSTANCE: invention relates to video encoding/decoding. Result is achieved by the fact that the current chroma block is predicted based on the intra-prediction mode of the current chroma block, wherein the determination of the intra-prediction mode of the current chroma block is provided by performing steps of selecting one of the first group of modes and the second group of modes based on the first flag signaled from the encoding device, wherein the first group of modes includes only prediction modes based on inter-component links, the second group of modes includes 67 modes of intra-prediction, preset in the decoding device, which 67 modes of intra-prediction consist of 2 non-directional modes and 65 directional modes, and the first flag indicates whether the intra-prediction mode of the chroma unit belongs to the first mode group or the second mode group; then extracting the intra-prediction mode of the chroma block from the selected one group of modes.
EFFECT: high efficiency of video compression.
7 cl, 15 dwg, 6 tbl
