**2. Related Works**

As mentioned in the introduction, HEVC, by allowing a larger block size compared to AVC, has made affine motion compensation more usable, allowing for very large efficiency gains in sequences that present non-translational motion.

We focus on the implementations on top of HEVC as the proposed implementations in JEM in VVC are not true affine motion compensation, as they compute a standard translational motion vector for 4 × 4 subblocks.
