摘要：An Adaptive Spatio-Temporal Error Concealment (ASTEC) scheme based on H.264/AVC is proposed in the paper to improve the quality of the rebuilt frame in H.264/AVC decoder side. Combining the spatial error concealment method with the temporal one, a new scheme is proposed to conceal an erroneous macro block according to its encoded mode. The temporal error concealment scheme adopts the weighted Boundary Matching Algorithm to recover the erroneous macro block. The spatial error concealment scheme recovers the erroneous macro block by exploiting the directional interpolation which subdivides the macro block according to the number and the direction of edges going through it. Experiments show that the proposed concealment scheme can restrain the diffusion of erroneous macro block and improve the quality of the rebuilt frame subjectively as well as objectively.
