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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。
A method for objective sound quality evaluation of communication system or communication equipment using cepstrum distance measurement of dynamic characteristics of speech spectrum is proposed. It is based on the research on the evaluation of the primary and objective sound quality in voice communication and on the basis of using LPC cepstrum distance to evaluate the speech quality of Mandarin. The dynamic behavior of the speech spectrum is expressed using the regression analysis of the cepstral coefficients over time. In this method, the distance is calculated using three parameters: cepstral coefficient, regression coefficient and energy. The correlation between the four distance estimation methods and the subjective quality evaluation (MOS) is compared. The results show that the correlation between the comprehensive evaluation and the MOS score is the best, with a correlation coefficient of 0.954, and objective evaluation method and subjective evaluation method are obtained Consistent results.