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.