电子耳蜗体外语音处理器的设计

电子耳蜗是一种通过电刺激残存听神经使重度耳聋患者恢复部分听力的人工装置,由体外语音处理器和体内接6/刺激器组成.本文设计基于通用16位定点DSP芯片TMS320VC5502的语音处理器,系统设计包括硬件和软件部分.硬件部分由采样模块、发射模块组成,低功耗立体声模数转换芯片CS53L21用于采集语音信号,利用MLX90121通过射频发射编码的语音信息.软件部分实现4通道的CIS(Continuous Interleaved Sampling)语音处理策略,完成对采样语音信号的处理,并通过采样语音信号数据验证算法的正确性.

Design of Speech Signal Processor for Cochlear Implants

Cochlea implants is an artificial setting using external body worn speech processor and internal receiver-stimulator for stimulating remaining auditory nerve that enables understanding the speech by hearing impaired personnel.Development of the Speech Processor of Cochlear implants is based on TMS320VC5502 is described.The system comprises sampling interface,radio frequency transmitter interface.The low power stereo A/D CS53L21 is used to collect the speech signal,The MLX90121 is used to as data encoder to send speech information to receiver/stimulator via RF link;A four-channel CIS(Continuous Interleaved Sampling)algorithm is implemented for the speech processor.The implementation aspects of CIS algorithm are validated using the test data of speech samples.