A generalized coding artifacts and noise removal algorithm for digitally compressed video signals

Authors:
Ling Shao;Hui Zhang;Yan Liu
Affiliations:
Department of Electronic & Electrical Engineering, The University of Sheffield, UK;Department of Computer Science and Technology, United International College, China;Department of Computing, Hong Kong Polytechnic University, Hong Kong
Venue:
MMM'11 Proceedings of the 17th international conference on Advances in multimedia modeling - Volume Part I
Year:
2011

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Abstract

A generalized coding artifact reduction algorithm is proposed for a variety of artifacts, including blocking artifact, ringing artifact and mosquito noise. This algorithm does not require grid position detection and any coding parameters. All the filtering is based on local content analysis. Basically, the algorithm attempts to apply mild low-pass filtering on more informative regions to preserve the sharpness of the object details, and to apply strong low-pass filtering on less informative regions to remove severe artifacts. The size and parameters of the low-pass filters are changed continuously based on the entropy of a local region.