THE IN-LOOP FILTERING PIPELINE IN AV2
Abstract
This paper presents an overview of the in-loop filtering pipeline in the latest AV2 video codec from the Alliance for Open Media consortium. Starting from AV1, the in-loop filtering pipeline has been substantially enhanced by improving the deblocking filter, adding a cross-component sample offset filter, replacing the filters in Loop-Restoration tool in AV1 with new non-separable and cross-component Wiener filters, and finally adding a data-driven guided detail filter. The paper provides a detailed design of the tools and present tools-off results on each of the tools on a recent version of the AV2 reference software.
