• Title/Summary/Keyword: Pitch-synchronous multi-spectra(PSMS) method

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Speech Signal Processing using Pitch Synchronous Multi-Spectra and DSP System Design in Cochlear Implant (피치동기 다중 스펙트럼을 이용한 청각보철장치의 음성신호처리 및 DSP 시스템 설계)

  • Shin, J. I.;Park, S. J.;Shin, D. K.;Lee, J. H.;Park, S. H.
    • Journal of Biomedical Engineering Research
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    • v.20 no.4
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    • pp.495-502
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    • 1999
  • We propose efficient speech signal processing algorithms and a system for cochlear implant in this paper. The outer and the middle car which perform amplifying, lowpass filtering and AGC, are modeled by an analog system, and the inner ear acting as a time-delayed multi filter and the transducer is implemented by the DSP circuit which enables real-time processing. Especially, the basilar membrane characteristic of the inner ear is modeled by a nonlinear filter bank, and then tonotopy and periodicity of the auditory system is satisfied by using a pitch-synchronous multi-spectra(PSMS) method. Moreover, most of the speech processing is performed by S/W so the system can be easily modified. And as our program is written in C-language, it can be easily transplanted to the system using other processors.

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