FIELD: encoding/decoding.
SUBSTANCE: invention relates to means for encoding and decoding video images. The difference of a motion vector of an image affine block is determined. The accuracy of the motion vector of the image affine block is determined. The size of an affine subblock of a motion compensation image in the image affine block is determined based on the difference of the motion vector, the accuracy of the motion vector, the distance between control points in the image affine block and the size of the image affine block. In this case, the size contains a length in the horizontal direction and a length in the vertical direction, wherein the length of the image affine block in the horizontal direction is an integer multiple of the length of the affine subblock of the motion compensation image in the horizontal direction, and the length of the image affine block in the vertical direction is an integer multiple of the length of the affine subblock of the motion compensation image in the vertical direction; and control points, which are pixels used to determine the difference of the motion vector.
EFFECT: increase in the efficiency of encoding video images.
38 cl, 21 dwg, 1 tbl
