Proceedings of the KOSOMBE Conference (대한의용생체공학회:학술대회논문집)

The Korean Society of Medical and Biological Engineering (대한의용생체공학회)
권호 표지

EEG signal display as a multirate sampling problem

멀티레이터 샘플링 문제로서의 뇌파신호 디스플레이

  • Choi, H.G. (Department of control engineering, Kumoh National University of Technology) ;
  • Oh, Y.S. (Department of control engineering, Kumoh National University of Technology) ;
  • Lee, S.J. (Department of control engineering, Kumoh National University of Technology)
  • 최한고 (금오공과대학교 제어공학과) ;
  • 오영석 (금오공과대학교 제어공학과) ;
  • 이상재 (금오공과대학교 제어공학과)
  • Published : 1996.05.17
Download PDF
⟨ Previous Next ⟩

Abstract

The display of biological signals in monitors often involves a multirate sampling operation which consists of decimation and intenolation. All electroencephalographic (EEG) samples of 10 to 30 seconds must be displayed in the computer screen to keep the aspect ratio of the paper polygraph output. Since the current affordable display technology plots at most 2,000 pixels per row, some samples need to be discarded. This paper studies methods to perform this operation characterizing them from the signal processing viewpoint and compares the display quality among several decimations. Experimental results show that a nonlinear operation such as the peak detection could be preferable than the canonical linear filtering to reduce aliasing.

Keywords