A zero error propagation extension to H264 for low delay video communications over lossy channels

Abstract

In this paper, we introduce a method for video transmission over lossy channels. The proposed method is similar to NEWPRED[1] and uses feedback information to stop error propagation. Main operational difference is replication of packet loss and error concealment process at the encoder and using the possibly error concealed frames as reference frames in the motion prediction loop. We have studied the optimization of proposed method under moderate error rates where a both ACK/NACK mode NEWPRED does not efficiently solve the problem. The proposed solution is an adaptive method that optimizes the operation based on the expected error propagation. We present comparison results with NEWPRED under various channel conditions and video sources.