基于小波变换的语音质量客观评估方法研究  

Study of Objective Evaluation of Communication Speech Quality Based on Wavelet Transform

作　　者：陈静[1] 赵凌伟[1] 

机构地区：[1]中国人民解放军91404部队

出　　处：《无线电工程》2012年第10期13-15,19,共4页Radio Engineering

摘　　要：对小波变换原理进行简要分析的基础上,对小波变换与小波美倒谱(MFCC)方法相结合进行语音客观音质评价的方法进行了研究,给出了小波美倒谱语音音质评估原理及计算流程。使用MFCC方法和小波美倒谱算法分别计算原始语音文件与受扰语音文件的失真距离,并将失真距离与主观评测结果进行相关分析,得出相应算法的相关系数和方差值,通过对比表明小波美倒谱语音评估方法对于以倒谱域参数为基础的客观评价方法有很大改善。Based on the analysis of the principle of wavelet transform,this paper studies the way of objective evaluation of commu- nication speech quality by the combination of wavelet transform and MFCC（wavelet-MFCC） ,presents the principle and flow chart of e- valuation of speech quality using wavelet-MFCC,obtains the distorted distance between the original phonetic files and the jammed pho- netic files by the way of MFCC and wavelet-MFCC respectively,and makes a correlative analysis of the distorted distance and the sub- jective evaluating result, educing the correlative coefficient and variance for each of the ways. It is proven by comparison that the wave- Iet-MFCC has a great improvement over the objective evaluation based on MFCC.

关 键 词：小波变换 MFCC 语音音质客观评价 相关 

分 类 号：TN303[电子电信—物理电子学]