대한의용생체공학회:의공학회지 (Journal of Biomedical Engineering Research)

  • 제17권3호
  • /
  • Pages.347-354
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  • 1996
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  • 1229-0807(pISSN)
  • /
  • 2288-9396(eISSN)
대한의용생체공학회 (The Korean Society of Medical and Biological Engineering)
권호 표지

WT평면에서의 디지탈 청각 보조 신호 처리 시스템의 설계

A Study on the Design of a Digital Hearing Aids Signal Processing System in the Wavelet Transform Domain

  • 이현철 (서울시립대학교 대학원 전자공학과) ;
  • 석광원 (서울시립대학교 대학원 전자공학과)
  • 발행 : 1996.09.01
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초록

This paper presents digital hearing aids signal processing system in WT(wavelet transform) domain. For implementation of hearing aids in WT domain, the gain in frequency domain is approximated in WT domain. We also present the gain selection algorithm to deal with the change of input signal power. Most transform methods produce blocking effect, and this effect degrades the convergence rate of feedback canceller. As a solution, we proposed wavelet transform bascd feedback canceller. To evaluate the performance, we compared it with LOT (lapped orthogonal transform) method in the frequency domain. This system has not shown the blocking effect, and improves convergence rate as compared with the LOT based feedback canceller.

키워드

참고문헌

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