Loop filtering method and loop filtering device

Abstract

The invention provides a loop filtering method and a loop filtering device. The loop filtering method comprises the following steps: determining all possible filtering sequences of a plurality of loop filtering tools on the basis of the plurality of loop filtering tools for performing loop filtering on a reconstructed image, the filtering sequences being working sequences of the plurality of loop filtering tools; determining the filtering performance of each filtering sequence in all possible filtering sequences; selecting a filtering sequence with the highest filtering performance from all possible filtering sequences based on the filtering performance; and filtering the reconstructed image according to the selected filtering sequence.

Description

technical field [0001] The present disclosure relates to the field of video coding and decoding, and in particular, to a loop filtering method and a loop filtering device for optimizing a filtering order. Background technique [0002] In-loop filter (In-loop Filter) is one of the important modules of video codec. The main purpose of this module is to improve the subjective and objective quality of the reconstructed image after inverse transformation, so as to further improve the codec efficiency. Loop filtering can include many filtering techniques. For example, in the new generation of video coding standard VVC, it mainly includes four loop filtering techniques, namely deblocking filter (Deblocking Filter, DBF), sample offset compensation filter (Sample Adaptive Offset, SAO), adaptive loop filter (Adaptive Loop Filter, ALF) and cross-component adaptive loop filter (Cross Component Adaptive Loop Filter, CCALF), such as figure 1 shown. In the AVS3 standard, the first stage ...

AI Technical Summary

Problems solved by technology

However, the current filtering method does not effectively take into account the interaction between various filtering tools

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