Independence of amplitude-frequency and phase calibrations in an SSVEP-based BCI using stepping delay flickering sequences

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Title:	Independence of amplitude-frequency and phase calibrations in an SSVEP-based BCI using stepping delay flickering sequences
Authors:	羅孟宗;Chang, Hsiang-Chih;Lee, Po-Lei;Lo, Men-Tzung;Lee, I.-Hui;Yeh, Ting-Kuang;Chang, Chun-Yen
Contributors:	生醫理工學院生醫科學與工程學系
Keywords:	Accuracy;Adult;Algorithms;Analog-Digital Conversion;Brain - physiology;Brain-computer interface (BCI);Calibration;Delay;Electrodes;Electroencephalography;electroencephalography (EEG);Evoked Potentials, Visual - physiology;Female;Fixation, Ocular;Fourier Analysis;Humans;Male;Online Systems;Photic Stimulation - methods;Psychomotor Performance - physiology;Registers;Signal Processing, Computer-Assisted;Silicon;steady-state visual evoked potential (SSVEP);stepping delay flickering sequence (SDFS);User-Computer Interface;Visualization;Young Adult
Date:	2012-05-31
Issue Date:	2026-04-23 11:16:25 (UTC+8)
Publisher:	Institute of Electrical and Electronics Engineers Inc.;United States: IEEE
Abstract:	摘要： This study proposes a steady-state visual evoked potential (SSVEP)-based brain-computer interface (BCI) independent of amplitude-frequency and phase calibrations. Six stepping delay flickering sequences (SDFSs) at 32-Hz flickering frequency were used to implement a six-command BCI system. EEG signals recorded from Oz position were first filtered within 29-35 Hz, segmented based on trigger events of SDFSs to obtain SDFS epochs, and then stored separately in epoch registers. An epoch-average process suppressed the inter-SDFS interference. For each detection point, the latest six SDFS epochs in each epoch register were averaged and the normalized power of averaged responses was calculated. The visual target that induced the maximum normalized power was identified as the visual target. Eight subjects were recruited in this study. All subjects were requested to produce the "563241" command sequence four times. The averaged accuracy, command transfer interval, and information transfer rate (mean std.) values for all eight subjects were 97.38 5.97%, 3.56 0.68 s, and 42.46 11.17 bits/min, respectively. The proposed system requires no calibration in either the amplitude-frequency characteristic or the reference phase of SSVEP which may provide an efficient and reliable channel for the neuromuscular disabled to communicate with external environments. 其他題名： TNSRE 其他題名： IEEE Trans Neural Syst Rehabil Eng 出版者： United States: IEEE 出版日期： 2012-05-01 出處： IEEE transactions on neural systems and rehabilitation engineering, 2012-05, Vol.20 (3), p.305-312 資源來源： IEEE Electronic Library (IEL) 版權： Copyright The Institute of Electrical and Electronics Engineers, Inc. (IEEE) May 2012 識別號： ISSN: 1534-4320 識別號： ISSN: 1558-0210 識別號： EISSN: 1558-0210 識別號： DOI: 10.1109/TNSRE.2011.2180925 識別號： PMID: 22203724 識別號： CODEN: ITNSB3
Appears in Collections:	[Department of Biomedical Sciences and Engineering ] journal & Dissertation

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