Loss of information during transmission of compressed video over error prone networks may lead to objectionable visual distortion in the decoded video , and such distortion can propagate to many frames because of the motion compensated prediction and the variable - length coding used 采用运动补偿预测及可变长编码的压缩视频数据,在极易发生干扰的网络环境中传输时,信道传输差错对压缩编码图像质量影响很大,有时甚至会导致整个视频通信完全失效。
The extensive use of prediction and variable - length coding in video coding renders compressed bitstreams especially vulnerable to transmission errors and data losses . based on detailed analyses of mc - dpcm / dct mechanism , several error detection , resilience , concealment methods are discussed in this paper 本文在分析mc - dpcm dct压缩视频特点的基础上研究了各种误码检测方法,并详细讨论了编码端的误码容错、传输层差错控制、解码端的失真屏蔽以及编码器和解码器交互的差错控制方法。