研究了视频误码的语法/语义检测、相关性检测方法和错误掩盖方法，分析了AVS的技术特性。在此基础上提出了一种基于AVS的错误两步检测法和基于图像编码帧类型(I,P,B)的自适应错误掩盖方法。实验结果表明，两步检测法能对AVS码流中的错误进行准确定位，自适应错误掩盖方法对图像的恢复效果显著。同时该方法不中断解码器，不影响解码器的实时解码速度。

Syntax/semantics, correlation detection of errors and concealment were studied in this paper, and AVS(audio video coding standard working group of china) technology characteristics was analyzed. An error detection method with two step based AVS and an adaptive error concealment(EC) based on the coded frame type(I,P,B) are presented. The experimental results indicate that errors in AVS stream can be located accurately by two step detection method,and good results are gained by the adaptive EC. Meanwhile, these methods neither interrupt the decoder nor decrease the speed of decoder.