同质HEVC视频转码中的视频质量损失分析
Analysis of video quality losses in the homogenous HEVC video transcoding
摘要：
定量分析了同构HEVC视频转码器中的视频质量损失。通过使用HM15.0参考软件和一组测试视频序列，级联像素域视频转码器（CPDT）的概念已被用于收集分析所需的所有必要数据。该实验针对宽范围的源和目标比特率进行。这项工作的主要结果是广泛的评估CPDT，通常用作有效的视频转码工作的参考。到目前为止，文献中还没有这样广泛进行的研究。已经报道了转码视频与将原始视频以与转码视频相同的比特率直接压缩的视频之间的质量劣化。由转码引起的质量降级与转码数据流的比特率变化之间的依赖性在图上清楚地呈现。
英文摘要：
The paper presents quantitative analysis of the video quality losses in the homogenous HEVC video transcoder. With the use of HM15.0 reference software and a set of test video sequences, cascaded pixel domain video transcoder (CPDT) concept has been used to gather all the necessary data needed for the analysis. This experiment was done for wide range of source and target bitrates. The essential result of the work is extensive evaluation of CPDT, commonly used as a reference in works on effective video transcoding. Until now no such extensively performed study have been made available in the literature. Quality degradation between transcoded video and the video that would be result of direct compression of the original video at the same bitrate as the transcoded one have been reported. The dependency between quality degradation caused by transcoding and the bitrate changes of the transcoded data stream are clearly presented on graphs.
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