Generalized Source-Channel Prediction for Error Resilient Video Coding

Abstract

This paper proposes an error-resilient modification of conventional (encoder-reconstruction based) prediction framework in video coding. The technique is called generalized source-channel prediction (GSCP) and generates a prediction reference for the next frame as a weighted sum of the current frame reconstruction and the prediction reference of the last frame. Compared to existing leaky prediction, GSCP achieves better coding efficiency in single layer video coding, and specifically better exploits the robustness benefits offered by Intra coded macroblocks in past frames so as to reduce error propagation in the future frames. Significant performance gains were observed in simulations and support the effectiveness of GSCP.