视频压缩行业经常会遇到这样的说法:一些新的编码技术比以前最先进的编码器好X%, where “X” is some large number. In reality, arriving at a percentage gain is a complex process, depending on the reference (“baseline”) encoding, the encoding settings, the encoding bitrates, the video content being encoded, the method of comparison, and the comparison metrics. 本报告解释了如何使用一种实用的主观测试方法对编码技术进行主观评估,这种方法是可信的,并导致有意义的结果. 演讲中介绍了几个要主观评分的编码比特流的例子, 展示了如何根据呈现的工件对这些比特流进行评分, 并说明了如何收集主观分数,并从中得出有意义的收益指标.