复合嵌入式零树编码低码率容错视频传输

Hybrid embedded zero-tree coding low bitrate error-resilient for video transmission

提出一种基于可分级的小波变换嵌入式零树编码和H .2 63标准的复合低码率容错视频编码方法 .通过降低I帧的码率 ,在传输速率受限的前提下提高I帧刷新频率 ,限制传输差错扩展 ,改进了低码率视频传输的容错能力 .实验结果证明 ,H .2

This paper presented a hybrid low bitrate error resilient video coding technique for video transmission over the unreliable communication channel such as Internet or wireless environment. The hybrid coding technique combined the embedded zero tree coding algorithm for the scalable wavelet transformation and the standard H.263 video code. Given the available channel bitrate, by reducing I frame size in H.263 stream with wavelet transformation and zero tree coding algorithm, the I refresh frequency could be increased and the scope of error propagation was restrained, and the effect from transmission error to H.263 video stream was reduced. The experiment results showed that the robustness of H.263 against transmission error was improved.