一种Bark子波变换的电子耳蜗语音增强算法  

Speech enhancement in cochlear implant based on bark wavelet transform

作　　者：黄雅婷[1,2] 顾济华[1,2] 陶智[1,2] 赵鹤鸣[1,2] 吴迪[1,2] 

机构地区：[1]苏州大学物理科学与技术学院,江苏苏州215006 [2]苏州大学电子信息学院,江苏苏州215006

出　　处：《计算机工程与应用》2008年第5期215-217,231,共4页Computer Engineering and Applications

基　　金：国家自然科学基金(the National Natural Science Foundation of China under Grant No.60572076);江苏省高校自然科学研究计划项目(No.05JKB510113)

摘　　要：提出了一种Bark子波变换的电子耳蜗语音增强算法。该算法首先引入与人耳听觉系统更为适应的Bark子波变换来进行电子耳蜗CIS语音信号处理,然后在每个Bark通道中利用非线性谱减法对其进行语音增强,谱减法的参数由人耳隐蔽阈值来控制。结果表明:即使在低信噪比的情况下,信噪比也能提高16dB左右,合成的语音对于电子耳蜗使用者具有较好的清晰度和可懂度。A speech enhancement in cochlear implant based on Bark wavelet transform is proposed.Bark wavelet transform,which is more suitable to human ear＇s auditory system,is first used in this new algorithm to realize speech in electronic cochlear implant.Then non-linear spectral subtraction algorithm is used to enhance speech in each channel,and the parameter of spectral subtraction is controlled by the masking threshold of human auditory.The result shows that the SNR output can be improved by 16 dB even if the SNR input is low and the enhanced speech is more clearness and intelligibility.

关 键 词：Bark子波 电子耳蜗 语音增强 

分 类 号：TN912.3[电子电信—通信与信息系统]