H.264/AVC网络视频的丢包失真评估

H.264/AVC video quality assessment over IP network based on packet loss

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.

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.