| 摘要 |
Provided are a video image coding and decoding method, coding device and decoding device. The method comprises: determining a motion vector difference of an affine image block; determining a motion vector precision of the affine image block; determining, according to the motion vector difference, the motion vector precision and a distance between control points in the affine image block, a size of an affine motion compensation sub image block in the affine image block, the control points being pixel points used to determine the motion vector difference; and performing coding on the affine image block according to the size of the affine motion compensation sub image block. Therefore, the present invention reduces coding complexity and improves coding performance by selecting a proper size for a sub image block. |
