A Motion-Compensated Error Concealment Scheme for H.264 Video Transmission

For an entropy-coded video sequence, a transmission error in a codeword will not only affect the underlying codeword but may also affect subsequent codewords, resulting in a great degradation of received video frames. In this study, a motion-compensated error concealment scheme is proposed for H.264 video transmission. For H.264 inter-coded P frames, the predicted motion vector (PMV) for each corrupted block is first determined by the spatially neighboring motion vectors (MVs) around the corrupted block and the temporally motion-projected overlapping MVs in the previous frame. With the PMV being the central search point, three rood search patterns are developed for motioncompensated error concealment of small-, medium-, and large-motion corrupted blocks. Then error concealment refinement using Lagrange interpolation is performed on all the initially concealed blocks. Finally, the improved ELA (edge based line average) algorithm [11] is employed to refine each concealed block in P frames.