在電子耳蝸設(shè)計(jì)中，語(yǔ)音信號(hào)的實(shí)時(shí)有效編碼及傳輸是其中的關(guān)鍵技術(shù)。本文根據(jù)耳
蝸的空間位置編碼原理，設(shè)計(jì)了一套電子耳蝸語(yǔ)音處理軟硬件系統(tǒng)，以數(shù)字信號(hào)處理器
（Digital signal processor, DSP）芯片為其硬件核心，實(shí)現(xiàn)了采集語(yǔ)音信號(hào)并采用連續(xù)交替取樣(Continuous Interleaved Sampling, CIS)語(yǔ)音處理方案，并使用CVSD(Continuously VariableSlope Delta Modulation )編碼壓縮碼率，并通過(guò)無(wú)線芯片nRF2401A 進(jìn)行無(wú)線傳輸。初步實(shí)驗(yàn)結(jié)果表明：本文所設(shè)計(jì)的方案能夠有效地將語(yǔ)音信號(hào)轉(zhuǎn)變?yōu)殡娮佣佀璧男盘?hào)，并進(jìn)行有效的傳送。
關(guān)鍵詞：電子耳蝸；CIS 語(yǔ)音處理；CVSD 編碼；DSP；無(wú)線傳輸
Abstract: In the design of the Cochlea Implant, the real-time speech processing and coding effectively is the pivotal technology. Due to the location coding principle, this paper proposed a flexible scheme of hardware and software on speech processing system for Cochlear Implant. In this design, DSPs as a hardware’s core has been used for speech signal acquisition, processing under CIS (Continuous Interleaved Sampling) principle, CVSD
coding (Continuously Variable Slope Delta Modulation), and then transmitted wireless via nRF2401A module. Preliminary experiments validated that the proposed system could effectively convert the speech to the signals required by Cochlear Implant with the wireless transmission scheme efficiently.
Keywords: Cochlea Implant; Speech Processing of CIS; CVSD coding; DSPs; wireless transmission