Study of low bit rate speech codec algorithm in underwater acoustic communication

查看全文 作　　者：XIAO [1,2]Dong;MO [3]Fuyuan;CHEN [1]Geng;GUO [1]Shengming;MA [1]Li

机构地区：[1]Key Laboratory of Underwater Acoustic Environment,Chinese Academy of Sciences;[2]University of Chinese Academy of Sciences;[3]Institute of Acoustics,Chinese Academy of Sciences

出　　处：《Chinese Journal of Acoustics》索引2013年第32卷第4期,共14页

基　　金：supported by the National Natural Science Foundation of China(61102152) 摘　　要：At medium or long distance(> 10 km) underwater acoustic speech communication,information transfer rate is constrained by the complicated,time varying channel and limited bandwidth.The bit rate of speech coding is required to be as low as possible.The time delay of underwater acoustic wave propagation can be used for low bit rate speech coding.After investigating the Mixed Excitation Linear Prediction(MELP) standard and taking account of the auditory perceptual features,a variable and adjustable bit rate speech codec algorithm has been proposed,whose average bit rate is about 600 bps.The average Perceptual Evaluation of Speech Quality Mean Opinion Score(PESQ MOS) of synthesized speeches is about 2.8.It has been proved by the computer simulation and sea trial that the performance of the proposed algorithm is well and robust when bit error rate is no more than 10^(-3).The synthesized speech is vivid and intelligible,and keeps main individual characteristics of speaker. 关键词：语音编解码算法低比特率水声通信混合激励线性预测语音编码听觉感知合成语音个人特征

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Study of low bit rate speech codec algorithm in underwater acoustic communication

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