摘要
对视频进行质量评价时,为了不对视频序列完全解码,论文提出了一种基于H.264码流的无参考视频评价模型。该模型只需从码流中解析视频的量化参数、编码比特率和"跳跃"块等信息。论文首先确定了量化参数和主观质量之间的关系,然后分析视频的时间复杂度和空间复杂度,最终利用人眼的空间掩盖效应和时间掩盖效应建立一个能反映人眼视觉特性的视频质量评估模型。实验表明该模型计算出的视频序列的质量和视频的主观质量评价有很好的相关性,能用于对H.264视频进行质量评价。
In order not to completely decode the video when evaluating the quality of the video, a no-reference video quality assessment model based on H. 264 bit-stream is presented. The model simply analyzes the payload information such as the quantization parameters, bit-rate and skip-blocks from bit-stream. Firstly, the relationship between the quantization parameters and the subjective quality is modeled. Then, the spatial complexities and temporal complexities of the video are analyzed. Finally, a video quality assessment model is established taking account of the spatial and temporal masking effect of the human visual system. Experimental results show the quality calculating by the model has a good correlation with the sub- ject quality assessment. The model can be used to evaluate the quality of H. 264 video.
出处
《计算机与数字工程》
2014年第5期852-854,867,共4页
Computer & Digital Engineering
关键词
无参考视频质量评价
编码失真
人眼视觉系统
H.264码流
no-reference video quality assessment, coding distortion, human visual system, H. 264 bit-stream
