基于H.263技术的差错掩盖和交互差错修正技术

随着通信和计算机技术的发展，基于不可靠网络的视频图象的通信受到了越来越广泛的应用。因此，视频传输中的差错控制技术和差错掩盖技术也显得越来越重要。本文提出了一种精确的差错恢复方案．即将精确差错跟踪和差错掩盖技术相结合的方案，不仅通过帧内编码刷新技术终止了差错的继续传播，而且利用图象和视频特性，在解码器端采
采用差错掩盖技术恢复受损图象。通过在H．263编解系统中的实验表明．这种方法对改善出现差错的视频信号非常有效．

Error Concealment and Interactive Error Resilience Based on H.263 Technologies

Because of the growing interest in video delivery over unreliable channels such as wireless networks and Internet,error control and concealment in video communication is becoming increasingly important. In this paper, a precise error resilient scheme is presented. By using precise error tracking(PET) and error concealment techniques, not only the error propagation effects can be terminated completely by INTRA to refresh the affected macroblocks, but also error concealment at the decoder recovers the damaged areas based on the characteristics of image and video signals. According to the result applied in the H.263 codec,this algorithm can get much better video quality with high BER in transmission effectively?