Publication:
A multi-command SSVEP-based BCI system based on single flickering frequency half-field steady-state visual stimulation

dc.contributor.authorYunyong Punsawaden_US
dc.contributor.authorYodchanan Wongsawaten_US
dc.contributor.otherMahidol Universityen_US
dc.date.accessioned2018-12-21T07:20:02Z
dc.date.accessioned2019-03-14T08:03:23Z
dc.date.available2018-12-21T07:20:02Z
dc.date.available2019-03-14T08:03:23Z
dc.date.issued2017-06-01en_US
dc.description.abstract© 2016, International Federation for Medical and Biological Engineering. Steady-state visual evoked potentials (SSVEPs) are widely employed in brain–computer interface (BCI) applications, especially to control machines. However, the use of SSVEPs leads to eye fatigue and causes lower accuracy over the long term, particularly when multi-commands are required. Therefore, this paper proposes a half-field steady-state visual stimulation pattern and paradigm to increase the limited number of commands that can be achieved with existing SSVEP-based BCI methods. Following the theory of vision perception and existing half-field SSVEP-based BCI systems, the new stimulation pattern generates four commands using only one frequency flickering stimulus and has an average classification accuracy of approximately 75 %. According to the proposed stimulus pattern, using only one frequency without requiring users to stare directly at the flickering stimulus allows users to easily focus on the system and experience less visual fatigue compared to existing systems. Furthermore, new half-field SSVEP-based BCI systems are proposed, incorporating our proposed feature extraction and decision-making algorithm. Extracting the signal from the occipital area and using a reference electrode position at the parietal area yielded better results compared to the central area. In addition, we recommend using an LED or LCD as the visual stimulus device (at the recommended size), which yielded comparable results to our proposed feature extraction and decision-making algorithm. Finally, an application of the proposed system is demonstrated for real-time television control.en_US
dc.identifier.citationMedical and Biological Engineering and Computing. Vol.55, No.6 (2017), 965-977en_US
dc.identifier.doi10.1007/s11517-016-1560-3en_US
dc.identifier.issn17410444en_US
dc.identifier.issn01400118en_US
dc.identifier.other2-s2.0-84988625058en_US
dc.identifier.urihttps://repository.li.mahidol.ac.th/handle/20.500.14594/42343
dc.rightsMahidol Universityen_US
dc.rights.holderSCOPUSen_US
dc.source.urihttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84988625058&origin=inwarden_US
dc.subjectComputer Scienceen_US
dc.subjectEngineeringen_US
dc.titleA multi-command SSVEP-based BCI system based on single flickering frequency half-field steady-state visual stimulationen_US
dc.typeArticleen_US
dspace.entity.typePublication
mu.datasource.scopushttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84988625058&origin=inwarden_US

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