Error Concealment of H.264/AVC Inter-Coded Video Frames

In this paper, we propose a procedure to recover lost slices in inter-coded H.264/AVC video frames. The procedure recovers missing pixels by exploiting temporal information. In particular, it considers 4 x 4 blocks and performs a full search procedure on an adaptive size window in the reference frames, in order to determine the best block according to a specified metric. One key point of the proposed technique is the use of a modified metric, that takes into account continuity at the block boundaries as well as the smoothness of the motion field. Experimental results show that the proposed scheme compares favorably with existing state-of-the-art methods, both objectively and subjectively.