A spatial-domain error concealment method with edge recovery and selective directional interpolation

A low complexity spatial-domain error concealment method is proposed to reconstruct still images and intra-coded (I) frames in video when they are transmitted through unreliable channels in this work. The pro-posed concealment algorithm works with the following steps. First, missing edges in a lost macroblock (MB) are detected and recovered using gradient data. Then, the lost MB is implicitly divided into several segments along the recovered edges. Finally, each pixel in a seg-ment is directionally interpolated from boundary pix-els adjacent to the segment. Experimental results show that the proposed algorithm can recover high as well as low frequency information in lost MBs and provide bet-ter visual quality in comparison with the conventional spatial domain interpolation. 1