A New Cochlear Prosthetic System with an Implanted DSP  

一种带植入式数字信号处理器的新型人工耳蜗系统(英文)

作　　者：麦宋平[1] 张春[2] 晁军[2] 王志华[2] 

机构地区：[1]清华大学电子工程系,北京100084 [2]清华大学微电子研究所,北京100084

出　　处：《Journal of Semiconductors》2008年第9期1745-1752,共8页半导体学报（英文版）

基　　金：the National Natural Science Foundation of China(No.60475018)~~

摘　　要：This paper proposes a cochlear prosthetic system with an implanted digital signal processor （DSP）. This system transmits voice-band signals with a low data rate through the wireless link, free of the data-rate limitation and suitable for future development. By optimizing the speech processing algorithm and the DSP hardware design, the implanted DSP manages to execute the continuous interleaved sampling （CIS） algorithm at a clock frequency of 3MHz and a power consumption of only 1.91mW. With an analytic power-transmission efficiency of the wireless inductive link （40%）, the power overhead caused by the implanted DSP is derived as 2.87roW,which is trivial when compared with the power consumption of existing cochlear prosthetic systems （tens of milliwatts）. With the DSP implanted,this new system can.be easily developed into a fully implanted cochlear prosthesis.提出了一种带植入式数字信号处理器的人工耳蜗系统.该系统只需在无线通道中传输低码率的语音信号,不存在数据码率受限的问题,有利于人工耳蜗未来的发展.通过优化语音处理算法和数字信号处理器硬件设计,植入式的处理器可以在3MHz的时钟频率下执行连续相间采样(CIS)算法,功耗仅为1.91mW.根据理论分析得到的无线能量传输效率(40%),可以推算出由于处理器植入所增加的功耗是2.87mW,与现有的商用人工耳蜗系统整机功耗(几十毫瓦)相比微乎其微.由于处理器的植入,新系统可以很容易扩展成全植入式人工耳蜗系统.

关 键 词：cochlear prosthesis low power algorithm optimization digital signal processor power-transmission efficiency 

分 类 号：TN912[电子电信—通信与信息系统]