基于全相位滤波器的改进人工耳蜗CIS言语处理方案

山东大学学报(工学版)

基于全相位滤波器的改进人工耳蜗CIS言语处理方案

庞智敏¹，田　岚¹^，²，侯正信²

1．山东大学信息科学与工程学院，山东济南 250100；2. 天津大学电子信息工程学院，天津 300072

收稿日期:2006-10-17 修回日期:1900-01-01 出版日期:2007-02-24 发布日期:2007-02-24
通讯作者: 庞智敏

The improvement of the cochlear implantation CIS speech processing method based on the all phase DFT filter

PANG Zhi-min¹, TIAN Lan¹^,², HOU Zheng-xin²

1. School of Information Science and Engineering, Shandong University, Jinan 250100, China; 2. School of Electronic and Information Engineering, Tianjin University, Tianjin 300072, China

Received:2006-10-17 Revised:1900-01-01 Online:2007-02-24 Published:2007-02-24
Contact: PANG Zhi-min

摘要/Abstract

摘要： 人工耳蜗是帮助深度耳聋患者恢复听力的一种装置.利用电子耳蜗电刺激的简化模型，采用滤波特性更佳的新型全相位数字滤波器对人工耳蜗连续相间采样(continuous interleaved sampler，CIS)语音信号处理方案进行仿真及声音合成，来模拟耳蜗植入者所听到的声音，并与传统的巴特沃夫滤波器仿真方案结果相比较.仿真实验结果表明：采用全相位滤波器得到的合成语音更为清晰，噪音有所减弱，优于巴特沃夫滤波器设计所得到的结果.

关键词: 人工耳蜗, 全相位滤波器, 连续交替取样

Abstract: Cochlear implantation is a new technology to restore the hearing ability for deaf people. A new type of digital filter with better filtrating ability, that is an all phase DFT filter, was introduced to simulate cochlear implantation CIS speech processing and to synthesize the voice, using the simple model of electrode excitation cochlear implant. By doing this, the voice can be simulated for the person with a cochlear implant. Comparisons between this model and the traditional Butterworth filter were made. The results of the experiment show that the synthesized speech spectra by the all phase DFT digital filter is closer to the original speech spectra, and is much better than the results of the Butterworth filter.

Key words: the all phase DFT filter, continuous interleaved sampler (CIS) , cochlear implant

中图分类号:

R318.1

庞智敏,田　岚,侯正信 . 基于全相位滤波器的改进人工耳蜗CIS言语处理方案[J]. 山东大学学报(工学版), 2007, 37(1): 35-38 .

PANG Zhi-min,TIAN Lan,HOU Zheng-xin . The improvement of the cochlear implantation CIS speech processing method based on the all phase DFT filter[J]. JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE), 2007, 37(1): 35-38 .

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