Spatio-temporal video error concealm entusing priority-ranked region-matching

Abstract

When transmitted over error-prone networks, compressed video sequences may be received with errors. In this paper we propose a priority-ranked region-mathing algorithm to recover the "lost" area of the decoded frames, in which both temporal and spatial correlations of the video sequence are exploited. In the proposed scheme, we first calculate the priorities of alledge pixels of the "lost" area and generate a priority-ranked region group. Then according to their priorities, the regions in the group will search their best matching regions ten porally and spatially. Finally, the "lost" area is recovered progressively by the corresponding pixels in the matching regions. Experimental results show that the proposed scheme achieves higher PSNR as well as better video quality in comparison with the method adopted in H 264. © 2005 IEEE.