The brain computer interface using flash visual evoked potential and independent component analysis

Po Lei Lee, Jen Chuen Hsieh, Chi Hsun Wu, Kuo Kai Shyu, Shyan-Shiou Chen, Tzu Chen Yeh, Yu Te Wu

研究成果: 雜誌貢獻文章

36 引文 (Scopus)

摘要

In this study flashing stimuli such as digits or letters are displayed on a LCD screen to induce flash visual evoked potentials (FVEPs). The aim of the proposed interface is to generate desired strings while one stares at target stimulus one after one. To effectively extract visually-induced neural activities with superior signal-to-noise ratio independent component analysis (ICA) is employed to decompose the measured EEG and task-related components are subsequently selected for data reconstruction. In addition all the flickering sequences are designed to be mutually independent in order to remove the contamination induced by surrounding non-target stimuli from the ICA-recovered signals. Since FVEPs are time-locked and phase-locked to flash onsets of gazed stimulus segmented epochs from ICA-recovered signals based on flash onsets of gazed stimulus will be sharpen after averaging whereas those based on flash onsets of non-gazed stimuli will be suppressed after averaging. The stimulus inducing the largest averaged FVEPs is identified as the gazed target and corresponding digit or letter is sent out. Five subjects were asked to gaze at each stimulus. The mean detection accuracy resulted from averaging 15 epochs was 99.7%. Another experiment was to generate a specified string '0287513694E'. The mean accuracy and information transfer rates were 83% and 23.06 bits/min respectively.

原文英語
頁(從 - 到)1641-1654
頁數14
期刊Annals of Biomedical Engineering
34
發行號10
DOIs
出版狀態已發佈 - 2006 十月 1

指紋

Brain computer interface
Bioelectric potentials
Independent component analysis
Flickering
Electroencephalography
Liquid crystal displays
Signal to noise ratio
Contamination
Experiments

ASJC Scopus subject areas

  • Biomedical Engineering

引用此文

The brain computer interface using flash visual evoked potential and independent component analysis. / Lee, Po Lei; Hsieh, Jen Chuen; Wu, Chi Hsun; Shyu, Kuo Kai; Chen, Shyan-Shiou; Yeh, Tzu Chen; Wu, Yu Te.

於: Annals of Biomedical Engineering, 卷 34, 編號 10, 01.10.2006, p. 1641-1654.

研究成果: 雜誌貢獻文章

Lee, Po Lei ; Hsieh, Jen Chuen ; Wu, Chi Hsun ; Shyu, Kuo Kai ; Chen, Shyan-Shiou ; Yeh, Tzu Chen ; Wu, Yu Te. / The brain computer interface using flash visual evoked potential and independent component analysis. 於: Annals of Biomedical Engineering. 2006 ; 卷 34, 編號 10. 頁 1641-1654.
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