视频错误检测是视频错误隐藏的基础，为此针对视频的典型应用场景对其展开研究，对基于空域特征的错误检测算法进行了改进，使其可自适应调节判决门限。在此基础上综合已有算法并引入视频时域相关性特征，提出一种具有较强普适性的基于先验约束的空时联合视频错误检测算法。以3G视频通话业务为例进行仿真，仿真结果表明，该算法错误检测的定位精度较高，为错误隐藏提供了可靠依据。

The video error detection is the basis of error concealment, which is studied in a typical application scene in this paper. At first, the error detection algorithm based on spatial feature is improved to adaptively adjust the decision threshold. Then, the feature of video temporal correlation is introduced, and a novel joint space-time video error detection algorithm based on prior restrictions with better applicability is proposed. Finally, the algorithm is simulated in 3G video communication environment, the results indicate that the proposed algorithm has a higher accuracy and provided a reliable basis for error concealment.