A Low Complexity Concealment Algorithm for H.264 Encoded Video over DVB-S2

Due to the high level of compression, H.264/AVC video information is very sensitive to channel errors, and in particular the Variable Length Coding applied at the encoder side, together with Motion Compensation, can amplify the effects of transmission errors during the decoding phase. If, in addition, we consider that in real time applications lost or damaged data cannot be retransmitted, the importance to introduce concealment techniques in order to recover lost or corrupted video data emerges, through the exploitation of spatial and/or temporal correlation among the residual available information. In this paper we present a technique for polygonal edge interpolation, to improve the performance of Intra concealment in the case of video frames rich in details. Experimental results show that the proposed low complexity scheme may provide substantial improvements to the perceived video quality, confirmed by an increase in PSNR values.