AVS is Chinese standard with independent intellectual property rights for the second-generation source coding. In this paper, we give an overview of AVS and stream structure. Then we analyze the influence of bit error in various group fields and classify those fields by effects on the quality of the video sequence. On this basis, we find out a method to describe the performance of error resilience and give some simulation results for two typical video sequences. At last, we research on the impact of encoding parameters on performance of error resilience. The results show the video quality influenced by the parameters.