汉语通信系统客观音质评价方法

详细信息

A measure for objective speech quality evaluation of Chinese communication channels

摘要: 提出一种使用语音频谱动态特性的倒谱距离测量对通信系统或通信设备进行客观音质评价方法.它是在对语音通信中主、客观音质评价的研究并在使用LPC倒谱距离评价普通话语音质量的基础上发展起来的。语音频谱动态特性是利用倒谱系数对时间的回归分析来表示的.这种方法中,使用倒谱系数,回归系数和能量三个参数计算距离。比较了四种距离估算方法和主观音质评价(MOS)的相关性,结果表明该方法的综合评价与MOS得分的相关性最好,相关系数为0.954,取得了客观评价方法与主观评价方法一致的结果。

Abstract: This paper studies briefly a distance measure for objective quality evaluation of Chi-nese communication channels using dynamic spectral features.It is based on studies for subjec-tive and objective quality evaluation and LPC cepstral distance measure.The dynamic spectral features are expressed by the cepstral regression coefficients.We used the three parameters cep-stral coefficients,regression coefficients and log energy to measure objective speech quality.The correlations between 4 sorts of objective distance measure and the subjective quality evaluation (MOS) have been compared;the experimental results show that this objective measure is the best among the 4 sorts of objective distance measure,and the correlation coefficient is 0.954.