H .264/AVC网络视频的丢包失真评估

摘要

A no-reference video quality assessment method is proposed for H. 264/AVC network videos. The affection of packet loss on video qualities is first analyzed. Then, the video qualities are assessed by analyzing the spatial-temporal error propagation and error concealment which is induced by the new coding features of H.264/AVC. The complexity of the proposed quality assessment method is low, and it is suitable for assessing qualities of real time videos. Experimental results demonstrate that the MSE ( mean square error ) of the assessed video qualities is consistent with that obtained by full reference quality assessment. The correlation coefficient is greater than 0.85.%针对新一代压缩编码标准H.264/AVC所使用的新编码技术在网络传输时误码对视频质量的影响，提出一种无参考的H.264／AVC网络视频的丢包失真评估方法.首先对信道误码引起的视频失真进行了分析，然后确定H.264／AVC编码新特性对空时域误码传播及误码掩盖的影响，进而提出一种无参考的H.264／AVC网络视频的丢包失真评估方法.该方法计算复杂度低，适合对实时传输的视频进行质量监控.实验结果表明，使用该方法得到视频序列的 MSE （ mean square error）与使用全参考视频质量评估方法得到视频序列的MSE具有很好的一致性，相关性超过0.85.