数字助听器中非均匀余弦调制滤波器组的有效设计方法（英文）

发布时间：2018-02-19 19:19

本文关键词： 数字助听器余弦调制滤波器组非均匀滤波器组语音质量　出处：《Journal of Southeast University(English Edition)》2017年02期 　论文类型：期刊论文

【摘要】：为改善多通道助听器滤波器分解导致语音质量下降的问题,提出了一种基于听力图的非均匀余弦调制滤波器组的有效设计方法.首先根据线性迭代算法设计低通原型滤波器,然后根据原理公式设计得到均匀余弦调制滤波器组,最后根据听损患者听力图将变化平缓的频率范围对应的均匀滤波器组若干通道合并为一个通道,得到对应的非均匀余弦调制滤波器组.波形实验结果显示信号经非均匀滤波器组后的时域波形与语谱图无明显失真,差异较小.语音质量实验结果显示所提出的非均匀余弦调制滤波器组的主观语音质量评估值PESQ比传统滤波器组高出约35%,语音质量指数HASQI提高约40%.
[Abstract]:In order to improve the speech quality degradation caused by the decomposition of multi-channel hearing aid filters, an effective design method for nonuniform cosine modulation filter banks based on hearing graph is proposed. First, a low-pass prototype filter is designed according to the linear iterative algorithm. Then the uniform cosine modulation filter bank is designed according to the principle formula. Finally, according to the hearing graph of the hearing loss patient, the uniform filter bank corresponding to the frequency range with a gentle change is merged into one channel. The corresponding nonuniform cosine modulation filter banks are obtained. The waveform experiment results show that there is no obvious distortion in the time domain waveform and the speech spectrum of the signal after the non-uniform filter bank. The result of speech quality experiment shows that the subjective speech quality evaluation value (PESQ) of the proposed nonuniform cosine modulation filter bank is about 35% higher than that of the traditional filter bank, and the speech quality index (HASQI) is about 40% higher than that of the traditional filter bank.
【作者单位】：东南大学信息科学与工程学院;南京工程学院通信工程学院;广州大学机械与工程学院;
【基金】：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)
【分类号】：R764.5;TN713

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