Application of multidimensional scaling to subjective evaluation of coded speech
Application of multidimensional scaling to subjective evaluation of coded speech
复制标题
多维标度在编码语音主观评价中的应用
DOI：
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发表时间：
2000
期刊：
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通讯作者：
J. L. Hall
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作者：
J. L. Hall
我们提出了一种新的编码语音主观评价方法。这一程序有可能提供一种可锚定的质量衡量标准，它包含的信息比MOS测试提供的单一数字更多。在大规模听力测试中，利用多维尺度技术建立了一个刺激空间，并建立了该空间与语音质量之间的关系。在现场，用户使用本报告中描述的方法在该先前建立的空间中定位被评估的刺激，并且用户从该位置得出关于语音质量的结论。刺激空间是由多维缩放程序INDSCAL创建的，该程序基于语音样本之间的相异度的主观判断来创建刺激空间，在该刺激空间中，刺激之间的距离对应于感知相异度。刺激空间具有其维度对应于刺激的感知属性的附加属性。在一项试点实验中，一名男性和一名女性说话时产生的刺激空间被发现高度相关。在另一项研究中获得的MOS分数与刺激空间中的位置高度相关。我们讨论了这三个维度的物理和知觉的相关性。
We propose a new procedure for subjective evaluation of coded speech. This procedure has the potential of providing an anchorable measure of quality that contains more information than the single number provided by MOS testing. A stimulus space and the relationship between this space and speech quality are established with multidimensional scaling techniques in a large-scale listening test. In the field, the user uses a method described in this report to position a stimulus under evaluation in this previously-established space, and from this position the user draws conclusions about speech quality. The stimulus space is created by the multidimensional scaling program INDSCAL, which operates on subjective judgments of dissimilarities between samples of speech to create a stimulus space in which distances between stimuli correspond to perceptual dissimilarities. The stimulus space has the additional property that its dimensions correspond to perceptual attributes of the stimuli. In a pilot experiment, stimulus spaces for utterances produced by a male and a female talker were found to be highly correlated. MOS scores obtained in a separate study were found to be highly correlated with position in the stimulus space. We discuss both the physical and perceptual correlates of the three dimensions.