Abstract: A low complexity spatial-domain error concealment method is proposed to reconstruct lost Macroblocks（MBs） that content edges in video when they are transmitted through unreliable channels.The proposed concealment algorithm uses gradient data to estimate edge-orientation in the lost MB；Then each pixel is directionally interpolated from boundary adjacent pixels using a new method.Experimental results show that the proposed algorithm can recover high as well as low frequency information in lost MBs and provide better quality and speed in comparison with the conventional spatial domain interpolation.

摘要： 在无线网等不可靠信道传输视频中，针对包含边缘信息的宏块丢失带来的错误，提出了一种低复杂度的空间域错误隐藏算法，该算法根据周围已经接收到的宏块特征，估算丢失宏块中边缘方向，并按照边缘方向使用周围临近像素值进行插值，恢复出包含边缘的宏块；在插值过程中提出并采用了一种快捷的方向插值法。实验结果表明，该算法能有效地掩盖丢失宏块，比常规方法具有更好的掩盖效果与实时性。