Adaptive intra-refresh for low-delay error-resilient video coding

Low-delay and error-resilience video coding are critical for real-time video communication over wireless networks. Intra-refresh coding, which embeds intra-coded regions into inter frames can achieve a relatively smooth bit-rate and terminate the error propagation caused by the transmission loss. In this paper, we proposed a novel linear model for the intra-refresh cycle size selection adapting to the network packet loss rate and the motions in the video content. Experimental results show that this linear model works efficiently. The modelled cycle size can achieve almost the same quality as the optimal cycle size under different packet loss rates.