人工耳蜗语音信号处理CIS算法的设计与实现  

Design and Implementation of CIS Algorithm of Cochlear Implants′ Speech Signal Processing

作　　者：何星[1] 刘鸿瑾[1] 张铁军[1] 王东辉[1] 侯朝焕[1] 

机构地区：[1]中国科学院声学研究所

出　　处：《微电子学与计算机》2008年第7期32-35,共4页Microelectronics & Computer

摘　　要：文中采用硬件方法对人工耳蜗语音信号处理的CIS算法加以实现.分析了人工耳蜗的基本组成和CIS算法的原理,采用二阶节级连的形式来实现各通道的IIR滤波器,降低系数间的差异;采用乒乓操作来减少存储器的需求;兼容SPEAK策略,具有灵活的调节能力.仿真结果满足精度和频率的要求.CIS algorithm of cochlear implants＇ speech signal processing is achieved through hardware method. After analyzing the basic architecture of cochlear implants and CIS algorithm＇s principle, the article adopts second order sections to realize IIR filters so as to reduce the difference between coefficients. The size of demanded memory is reduced through using ping-pong operations, The design is compatible with SPEAK strategy and has the ability of flexible adjustment. The simulation result meets the requirement of precision and frequency.

关 键 词：人工耳蜗 CIS IIR滤波器 二阶节 

分 类 号：TP39[自动化与计算机技术—计算机应用技术]