东南大学学报（英文版）2017，Vol.33Issue(2)：140-144,5.DOI:10.3969/j.issn.1003-7985.2017.02.003
数字助听器中非均匀余弦调制滤波器组的有效设计方法
Efficient design method of non-uniform cosine modulated filter bank for digital hearing aids
摘要
Abstract
To promote the performance of the traditional multi-channel filter bank which leads to speech quality degradation,an efficient design method of the non-uniform cosine modulated filter bank(CMFB)based on the audiogram for digital hearing aids is proposed.First,a low-pass prototype filter is designed by the linear iterative algorithm.Secondly,the uniform CMFB is achieved on the basis of the principle formulas.Then,the adjacent channels of a uniform filter bank which have low or gradual slopes are merged according to the trend of audiogram of the hearing impaired person.Finally,the corresponding non-uniform CMFB is obtained.Simulation results show that the signal processed by the proposed filter bank is similar to the original signal in a time-domain waveform and spectrogram without significant distortion or difference.The speech quality results show that the personal evaluation of speech quality(PESQ)of non-uniform CMFB is 35％higher than that of the traditional design,and the hearing-aid speech quality index(HASQI)increases by about 40％.关键词
数字助听器/余弦调制滤波器组/非均匀滤波器组/语音质量Key words
digital hearing aids/cosine modulated filter bank(CMFB)/non-uniform filter bank/speech quality分类
信息技术与安全科学引用本文复制引用
郭如雪,赵力,梁瑞宇,邹采荣..数字助听器中非均匀余弦调制滤波器组的有效设计方法[J].东南大学学报（英文版）,2017,33(2):140-144,5.基金项目
The National Natural Science Foundation of China(No.61375028,61673108),China Postdoctoral Science Foundation(No.2016M601696),Qing Lan Project,the Program for Special Talent in Six Fields of Jiangsu Province(No.2016-DZXX-023),Jiangsu Planned Projects for Postdoctoral Research Funds(No.1601011B). （No.61375028,61673108）
