易错网中视频编码时域误码的优化

Temporal Error Optimization of Video Coding over Error-prone Networks

诸如移动网络一类的易错信道,其比特差错率相当高,在这样的信道上传输压缩视频信号是一个巨大的挑战。因此,在设计视频编码器时为得到可接受的服务质量,必须考虑信道误码率。讨论了一种有效的在易错网中传输视频信号时,优化时域误码的方法。给出一个率失真优化模式选择算法,该算法考虑了网络差错率和解码器所用的错误隐藏方法。仿真结果表明这一算法改善了视频传输的质量。

Transmission of compressed video over noisy channels presents many challenges. In noisy channels suchas mobile networks,bit-error rates (BER) can be quite high. Therefore,channel errors must be considered during the de- sign of the video coder in order to guarantee an acceptable quality of service. Describe an effective method for increas- ing the temporal error resilience of video transmission over bit error prone networks. Rate-distortion optimized mode selection algorithms are introduced that takes into account the network condition and the error concealment method used by the decoder. Experimental Results are presented in order to illustrate the advantages of the proposed method.