MAP-based post processing of video sequences using 3-D Huber-Markov random field model

Zhen Li, E.J. Delp
Proceedings. IEEE International Conference on Multimedia and Expo  
Block DCT (BDCT) is by far one of the most popular transforms used in image and video coding. However, it introduces a noticeable blocking artifact at low data rates. A great deal of work has been done to remove the artifact with information extracted from the spatial and frequency domains. In this paper we address the video sequence restoration problem as a 3-D Huber-Markov Random Field model and derive the temporal extension to traditional maximum a posteriori (MAP)-based methods. Two
more » ... ethods. Two schemes, we call Temporal MAP (TMAP) and Motion Compensated TMAP (MC-TMAP) respectively, are presented. We test our methods on MPEG-2 compressed sequences and evaluate their performances with traditional MAP restoration. Experiment results confirm that our schemes can significantly improve the visual quality of the reconstructed sequences. INDEX TERMS -BDCT, MAP, Huber-Markov Random Field, Motion Compensation
doi:10.1109/icme.2002.1035741 dblp:conf/icmcs/LiD02 fatcat:ya2oomkefnhavngtkbvqfj2qau