北京生物醫(yī)學工程

基于OMAP-L137的電子耳蝸體外語音處理器的設計

Design of the External Speech Processor of Cochlear Implant Based on OMAP-L137

作者：杜志玥關添宮琴

單位：清華大學生物醫(yī)學工程系（北京100084）

分類號：

出版年·卷·期（頁碼）：2011·30·2（166-172）

摘要：

電子耳蝸是目前唯一能使重度聾和全聾患者恢復聽覺的醫(yī)學裝置，研制價格適中、基于漢語特征的電子
耳蝸產品具有較高的經濟效益和深遠的社會意義。本文以新型DSP+ARM雙核低功耗處理器OMAP-L137為核
心，設計并實現(xiàn)了一款電子耳蝸體外語音處理器原型，包括核心處理器單元、音頻單元、SDRAM、NAND
Flash、USB2.0 OTG接口、無線發(fā)射接口等模塊。它實現(xiàn)了語音實時采集、連續(xù)交替采樣算法處理，并根
據(jù)刺激模式形成相應的刺激脈沖參數(shù)幀序列，發(fā)送到無線傳輸模塊。通過對本系統(tǒng)和電子耳蝸無線傳輸
模塊、刺激電路進行聯(lián)合調試，對語音采集、算法處理以及無線發(fā)射接口進行了驗證，測試結果表明系
統(tǒng)達到設計要求。

Cochlear implant is the only approved clinical device, which is used to produce
hearing sensations to a person with severe and profound nerve deafness. On account of the
affordability of a common Chinese family and the special characteristics of Mandarin, it is
essential to develop a kind of cochlear implant with higher quality and lower cost for
Chinese people. This paper designed and implemented a prototype platform of the external
speech processor for cochlear implant based on DSP and ARM dual core low-power processor
OMAP-L137, which included processor core unit, audio codec, SDRAM, NAND Flash, USB2.0 OTG
interface, wireless transmission interface, etc. It can execute speech sampling in real
time, apply CIS speech processing algorithm and then send the processed stimulating pulse
information sequence to the wireless transmission module. The test result with wireless
transmission module and stimulating circuit suggested that the proposed platform reached
the requirements of an external speech processor for cochlear implant in speech sampling,
speech processing and wireless transmission interface.

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