关键词: 3G, 编解码, 错误隐藏, 三次多项式插值

Abstract: In wireless video applications，frame loss is a common thing due to the high rate of error.The traditional methods of error concealment are not applicable to deal with the issue of frame loss.This paper proposes an error concealment algorithm based on polynomial interpolation，which uses cubic polynomial to predict and fit the motions of objects.The proposed method can overcome the shortcomings of the conventional methods，such as inaccurate estimations in dramatic scenes.Experimental results show that our algorithm can handle frame loss within different movements intensity and obtain higher PSNR and better visual effects.

Key words: 3G, codec, error concealment, polynomial interpolation