Adaptive constrained least squares restoration for removal of blocking artifacts in low bit rate video coding

For high compression ratios current video coding standards produce noticeable blocking and ringing noise due to a rigid block structure and coarse quantization. We propose a new method for reduction of these coding artifacts based on spatially adaptive constrained least squares restoration. The proposal is numerically simple and yields visually convincing results for intra as well as inter coded images. As a post-processing technique it is compatible to all existing image and video coding standards.