摘要
水声语音通信质量的实时测量是保障通信质量的重要环节,利用实时测量结果可及时调整语音业务的调制参数,提高链路的自适应能力。本文提出了一种基于参数表示的语音通信质量实时估测模型,该模型提取语音3个特征参数,即:Mel频率倒谱系数(Mel-frequency cepstum coefficient,MFCC)、线性预测倒谱系数(Linear predictive cepstrum coefficient,LPCC)及加权对数谱(Log spectral deviation,LSD),构建3种特征参数的权重谱失真测度。利用失真测度与接收语音质量(Perceptual evaluation of speech quality-mean opinion score,PESQ-MOS)之间的映射关系,建立语音质量估测模型。引入动态MFCC(Dynamic Mel-frequency cepstrtum coefficient,DMFCC)的谱失真测度作为质量估测模型的调节因子,使估测系统具有更好的适应性。实验及海测结果显示,利用本模型估测的语音MOS值与人主观感受误差较小,具有一定的实用性。
The real‐time measurement of quality of the underwater acoustic voice communication is crucial to communication quality .Real‐time measurements can help to adjust voice modulation parameters time‐ly and improve the adaptive ability of link .An objective assessment model for voice quality is proposed based on parameter extraction ,based on the underwater acoustic channel characteristics .Three feature parameters of voice are extracted :Mel‐frequency cepstrum coefficient (MFCC) ,linear predictive ceps‐trum coefficient(LPCC ) and log spectral deviation(LSD) .The three parameters form the weight spec‐tral distortion evaluation .the mapping relationship of distortion evaluation and receive voice quality of perceptual evaluation of speech quality ‐mean opinion score (PESQ‐MOS) is used to conduct quantiza‐tion .Dynamic Mel‐frequency cepstrum coefficient (DMFCC) spectral distortion evaluation is also intro‐duced as regulatory factor ,which improves the adapt‐ability .The results of simulation and sea test show that the measured MOS via the assessment model is close to PESQ‐MOS ,which indicated the model has practical value .
出处
《数据采集与处理》
CSCD
北大核心
2016年第2期307-314,共8页
Journal of Data Acquisition and Processing
基金
国家自然科学基金(61471308
61571377
61501386)资助项目
山东省计算机网络重点实验室(山东省计算中心)开放课题(SDKLCN-2013-02)资助项目
关键词
语音质量评价
水声信道特性
参数提取
语音感知质量评测
voice quality assessment
characteristics of underwater acoustic channel
parameter extrac-tion
perceptual evaluation of speech quality
作者简介
袁飞(1979),男,副教授,博士,研究方向:水声通信、水下多媒体信号传输及处理,Email:yuanfei@xmu.edu.cn。
陈炜玲(1991),女,博士研究生,研究方向:水声通信,信号处理。
李晔(1982).男,副研究员,研究方向:信号处理和语音编码。
程恩(1965),男.教授,博士生导师,研究方向:水下通信和数字信号处理。