Fast wavelet transformation of EEG

Steven Schiff, Akram Aldroubi, Michael Unser, Susumu Sato

Research output: Contribution to journalArticle

151 Citations (Scopus)

Abstract

Wavelet transforms offer certain advantages over Fourier transform techniques for the analysis of EEG. Recent work has demonstrated the applicability of wavelets for both spike and seizure detection, but the computational demands have been excessive. We compare the quality of feature extraction of continuous wavelet transforms using standard numerical techniques, with more rapid algorithms utilizing both polynomial splines and multiresolution frameworks. We further contrast the difference between filtering with and without the use of surrogate data to model background noise, demonstrate the preservation of feature extraction with critical versus redundant sampling, and perform the analyses with wavelets of different shape. Comparison is made with windowed Fourier transforms, similarity filtered, at different data window lengths. We here report a dramatic reduction in computational time required to perform this analysis, without compromising the accuracy of feature extraction. It now appears technically feasible to filter and decompose EEG using wavelet transforms in real time with ordinary microprocessors.

Original languageEnglish (US)
Pages (from-to)442-455
Number of pages14
JournalElectroencephalography and Clinical Neurophysiology
Volume91
Issue number6
DOIs
StatePublished - Jan 1 1994

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Wavelet Analysis
Electroencephalography
Fourier Analysis
Microcomputers
Noise
Seizures

All Science Journal Classification (ASJC) codes

  • Neuroscience(all)
  • Clinical Neurology

Cite this

Schiff, Steven ; Aldroubi, Akram ; Unser, Michael ; Sato, Susumu. / Fast wavelet transformation of EEG. In: Electroencephalography and Clinical Neurophysiology. 1994 ; Vol. 91, No. 6. pp. 442-455.
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Fast wavelet transformation of EEG. / Schiff, Steven; Aldroubi, Akram; Unser, Michael; Sato, Susumu.

In: Electroencephalography and Clinical Neurophysiology, Vol. 91, No. 6, 01.01.1994, p. 442-455.

Research output: Contribution to journalArticle

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