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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.
A cochlear implant system with implantable digital signal processor is proposed.The system only needs to transmit low bit rate speech signal in the wireless channel without the problem of limited data bit rate and is beneficial to the future development of artificial cochlear implant By optimizing the speech processing algorithms and digital signal processor hardware design, the embedded processor performs a continuous phase-to-phase sampling (CIS) algorithm with a power consumption of only 1.91mW at a 3MHz clock frequency.According to the theoretical analysis of the wireless energy Transmission efficiency (40%), we can infer that the processor power consumption is 2.87mW implants, compared with the current commercial cochlear system power consumption (tens of milliwatts) compared to minimal.Because the processor Implantation, the new system can be easily expanded into a fully implantable cochlear implant system.