在不稳定的网络上，视频传输的质量受到丢包和错包的影响．为此文中提出了一种低复杂度的空域多描述编码错误隐藏算法，对不同特征区域使用不同恢复策略．利用相邻帧的像素差异性和互补描述的残差能量来估计当前丢失描述的像素和运动差异性，以此对丢失宏块进行区域划分，进而选择不同的方法进行错误隐藏．实验结果表明: 对于绝大部分序列，文中算法与传统的空域多描述编码的错误隐藏算法相比，在主观质量和客观质量上都有提升．

Video transmission in unstable networks suffers packet loss and bit error.In order to solve this problem,a low- complexity error- concealment algorithm is proposed for the spatial multiple description coding (MDC).In the algorithm,different error concealment strategies are employed to treat the regions with different features.Moreover,the texture difference of adjacent frames and the residual energy of complementary description are used to estimate the spatial and motion differences of the lost description,based on which the region of lost macro- blocks is divided and different methods are adopted to implement error concealment.Experimental results show that,as compared with the traditional MDC error concealment algorithm,the proposed algorithm achieves better subjective and objec-tive quality of error concealment in most sequences.