FIELD: means for video coding and decoding.
SUBSTANCE: it is determined at the sequence level whether affine motion prediction is enabled by decoding the first high-level syntax element. It is determined, at the image level, whether each of the at least one encoding tool is enabled by decoding one or more second high-level syntax elements. At least one coding tool includes a count-by-count correction of affine motion prediction samples. When the affine motion prediction is enabled, the predictor defines two or three vectors of checkpoints movement of the target block encoded using affine motion prediction are determined, and affine prediction samples are generated for each of the subblocks in the target block by performing affine motion prediction in a unit of subblocks. When sample-by-sample adjustment of affine motion prediction samples is enabled, the predictor modifies the sample values in the affine prediction samples by motion compensation.
EFFECT: increased efficiency of video coding.
13 cl, 22 dwg
