Recovery of motion vectors for error concealment

A compressed bitstream generated by an MPEG-2 video coder is sensitive to channel errors. Due to the coding structure of the MPEG-2 video compression algorithm, a bit error can affect not only the current picture frame but also succeeding frames. In this paper, we propose a temporal domain error concealment algorithm to recover lost or erroneously received motion vectors. In order to estimate the motion vector of the erroneous macroblock at the decoder, we examine neighboring luminance intensity values of the lost macroblock. Simulation results show that the proposed algorithm produces reconstructed pictures of acceptable quality