NDLI: Appropriate twinkling frequency and inter-sources distance selection in SSVEP-based HCI systems

Content Provider	IEEE Xplore Digital Library
Author	Resalat, S.N. Setarehdan, S.K. Afdideh, F. Heidarnejad, A.
Copyright Year	2011
Description	Author affiliation: Biomedical Signal and Image Processing Laboratory (BiSIPL), School of Electrical Engineering, College of Engineering, Sharif, University of Technology, Tehran, Iran (Afdideh, F.) \|\| Control and Intelligent Processing Center of Excellence, School of Electrical and Computer Engineering, College of Engineering, University of Tehran, Tehran, Iran (Resalat, S.N.; Setarehdan, S.K.; Heidarnejad, A.)
Abstract	Steady-State Visual Evoked Potentials (SSVEPs) are one of the most important EEG signals used in Human Computer Interface (HCI) systems. These signals are generated by Looking at flickering external light sources stimulating the central part of the retina. By increasing the number of external light sources, detection of the corresponding SSVEPs from the recorded EEG signal becomes more complicated. On the other hand, the ratio of the sensitivity to specificity in high-speed classifiers becomes more significant. This study presents the effect of the twinkling frequencies and the inter-sources distance of two Light Emitting Diodes (LEDs) on the ratio of the sensitivity to specificity of the two classes. The features used for signal classification is the amplitude of the main frequencies in the spectrum of each frequency pairs that is simply classified by the Max classifier. The purpose of this is to find the best twinkling frequencies and the best inter-sources distance among a set of predefined values when there are only two light sources in order to nearly equalize the sensitivity and the specificity. For this aim, seven different frequency pairs of LEDs in five distinct inter-sources distances are examined and it is shown that the best frequency pair is 10 and 15 Hz with inter-sources distances of 24 or 44 cm.
Starting Page	12
Ending Page	15
File Size	511041
Page Count	4
File Format	PDF
ISBN	9781457702433
e-ISBN	9781457702426
DOI	10.1109/ICSIPA.2011.6144105
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-11-16
Publisher Place	Malaysia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Visualization Sensitivity Twinkling light sources Inter-sources distance Light emitting diodes Educational institutions Electroencephalography Steady-state Steady State Visual Evoked Potentials (SSVEPs) Light sources HCI
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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