POCS-BASED ERROR CONCEALMENT FOR PACKET VIDEO USING MULTIFRAME OVERLAP INFORMATION

This paper proposes a new error concealment algorithm for packet video , effectively eliminating error propagation effects. Most standard vid eo CODEC's use motion compensation to remove temporal redundancy. With such motion-compensated interframe processing, any packet loss may ge nerate serious error propagation over more than ten consecutive frames . This kind of error propagation leads to perceptually annoying artifa cts. Thus, proper error concealment algorithms need to be used to redu ce this effect. The proposed algorithm adopts a one-pixel block overla p structure. With the redundancy information from the damaged frame an d the following frames, the proposed POCS-based method can have consis tently high performance in error concealment. According to experimenta l results, the proposed algorithm can successfully eliminate visible e rror propagation. In addition, the proposed algorithm is very robust. Experimental results show that it can have good error concealment resu lts, even when the damaged frame loses all DCT coefficients.