Proceedings of the KOSOMBE Conference (대한의용생체공학회:학술대회논문집)

The Korean Society of Medical and Biological Engineering (대한의용생체공학회)
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Extraction of evoked potentials using the shrinkage of wavelet coefficients

Wavelet 계수 억제에 의한 유발전위 뇌파 신호의 추출

  • Lee, Y.H. (Dept. of Electronic Engineering, College of Technology, Hanyang University) ;
  • Park, H.S. (Dept. of Electronic Engineering, College of Technology, Hanyang University) ;
  • Kim, K.H. (Dept. of Medical Information, College of Medicine, Hanyang University) ;
  • Kim, S.I. (Dept. of Medical Information, College of Medicine, Hanyang University) ;
  • Lee, D.S. (Dept. of Electronic Engineering, College of Technology, Hanyang University)
  • 이용희 (한양대학교 공과대학 전자공학과) ;
  • 박현석 (한양대학교 공과대학 전자공학과) ;
  • 김강호 (한양대학교 의과대학 계량의학교실) ;
  • 김선일 (한양대학교 의과대학 계량의학교실) ;
  • 이두수 (한양대학교 공과대학 전자공학과)
  • Published : 1996.11.15
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Abstract

we propose the shrinkage of wavelet coefficients and the averaging method. The wavelet analysis decomposes the measured evoked potentials into scale coefficients and wavelet coefficients as a resolution level, respectively. And in the course of synthesis of evoked potentials, the presented method shrinks the wavelet coefficients, and then reproduces the evoked potentials and lastly averages it. we measured VEP signal to simulate the presented method, and compared it with averaged signal and LMS algorithm. As a result of simulations, the proposed method gets improved VEP about 0.2-1.6db in comparison with the result of averaging method.

Keywords