FIELD: physics.
SUBSTANCE: invention relates to video encoding techniques. Result is achieved by the fact that the video processing method includes steps of performing a first determination that the video luminance video block is encoded using a matrix-based intra-frame prediction (MIP) mode, in which the prediction unit of the luminance video block is determined by performing, on the previously encoded video samples, a downsampling operation at the boundary, which is followed by a matrix-vector multiplication operation and which is selectively followed by an upsampling operation, is performed based on the first determination, a second determination with respect to the intra-frame chroma mode to be used for the chroma video block associated with the luma video block; and performing, based on the second determination, conversion between the chroma video block and the bitstream representation of the chroma video block.
EFFECT: high efficiency of video encoding.
17 cl, 41 dwg, 8 tbl
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