视频压缩码流对于信道误码十分敏感,可能导致重建图像质量严重下降。误码掩盖技术利用图像在时间和空间上的相关性,可以有效地降低误码对视频图像的影响。文中提出了一种基于多方向边界匹配的时域误码掩盖算法。该算法能更精确地恢复错误宏块的运动矢量,从而获得比传统的时域掩盖算法更好的视频质量。 Video compression bit stream is very sensitive to the channel error code, may lead to serious decline in reconstruction image quality. The technology of bit error concealment utilizes the temporal and spatial correlation of the image, which can effectively reduce the impact of bit error on video images. In this paper, a time-domain error concealment algorithm based on multi-directional boundary matching is proposed. The algorithm can recover the motion vector of the wrong macroblock more accurately, so as to obtain better video quality than the traditional time-domain masking algorithm.