Existing　block-based　encoding　frameworks　often　use　inaccurate　quantification　and　motion　compensation　techniques,　which　result　in　many　compression　artifacts　due　to　the　loss　of　high-frequency　information.　In　particular,　the　blurring　of　content　edges　and　significant　compression　distortion　can　negatively　impact　the　subjective　video　quality　given　limited　coding　resources.　Hence,　there　is　an　urgent　need　to　build　a　quality　enhancement　method　for　improving　the　quality　of　the　compressed　video　at　the　receiving　end　given　the　same　coding　resources.　©　2022　IEEE.