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 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 a second group of modes based on a first flag signaled from the encoding device, wherein the first group of modes includes only inter-component link prediction modes, 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; wherein the second group of modes comprises a DC mode, a planar mode, a vertical mode and a horizontal mode.
EFFECT: high efficiency of video compression.
7 cl, 15 dwg, 6 tbl
