Error concealment for video sequences based on Sobel edge detector

A new error concealment algorithm is proposed as a post-processing tool at the decoder side for recovering the lost blocks and their motion vectors as well incurred during the video transmission. Sobel operator is used to detect the edge of the blocks around the lost block and find the more precise estimation of the motion vectors by all edge blocks. Simulation results show that the proposed method can recover the higher quality image in different video sequences, comparing to the existing traditional concealment algorithms.