File Download
There are no files associated with this item.
Links for fulltext
(May Require Subscription)
- Publisher Website: 10.1088/1741-2552/aa5989
- Scopus: eid_2-s2.0-85015794624
- PMID: 28091397
- WOS: WOS:000413826500006
- Find via
Supplementary
- Citations:
- Appears in Collections:
Article: A novel stimulation method for multi-class SSVEP-BCI using intermodulation frequencies
Title | A novel stimulation method for multi-class SSVEP-BCI using intermodulation frequencies |
---|---|
Authors | |
Keywords | brain-computer interface chromatic intermodulation frequencies luminance steady-state visual evoked potential |
Issue Date | 2017 |
Publisher | Institute of Physics Publishing. The Journal's web site is located at http://www.iop.org/EJ/journal/JNE |
Citation | Journal of Neural Engineering, 2017, v. 14 n. 2, p. 026013 How to Cite? |
Abstract | OBJECTIVE:
Steady-state visual evoked potential (SSVEP)-based brain-computer interface (BCI) has been widely investigated because of its easy system configuration, high information transfer rate (ITR) and little user training. However, due to the limitations of brain responses and the refresh rate of a monitor, the available stimulation frequencies for practical BCI application are generally restricted.
APPROACH:
This study introduced a novel stimulation method using intermodulation frequencies for SSVEP-BCIs that had targets flickering at the same frequency but with different additional modulation frequencies. The additional modulation frequencies were generated on the basis of choosing desired flickering frequencies. The conventional frame-based 'on/off' stimulation method was used to realize the desired flickering frequencies. All visual stimulation was present on a conventional LCD screen. A 9-target SSVEP-BCI based on intermodulation frequencies was implemented for performance evaluation. To optimize the stimulation design, three approaches (C: chromatic; L: luminance; CL: chromatic and luminance) were evaluated by online testing and offline analysis.
MAIN RESULTS:
SSVEP-BCIs with different paradigms (C, L, and CL) enabled us not only to encode more targets, but also to reliably evoke intermodulation frequencies. The online accuracies for the three paradigms were 91.67% (C), 93.98% (L), and 96.41% (CL). The CL condition achieved the highest classification performance.
SIGNIFICANCE:
These results demonstrated the efficacy of three approaches (C, L, and CL) for eliciting intermodulation frequencies for multi-class SSVEP-BCIs. The combination of chromatic and luminance characteristics of the visual stimuli is the most efficient way for the intermodulation frequency coding method. |
Persistent Identifier | http://hdl.handle.net/10722/259417 |
ISSN | 2023 Impact Factor: 3.7 2023 SCImago Journal Rankings: 1.094 |
ISI Accession Number ID |
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Chen, X | - |
dc.contributor.author | Wang, Y | - |
dc.contributor.author | Zhang, S | - |
dc.contributor.author | Gao, S | - |
dc.contributor.author | Hu, Y | - |
dc.contributor.author | Gao, X | - |
dc.date.accessioned | 2018-09-03T04:07:06Z | - |
dc.date.available | 2018-09-03T04:07:06Z | - |
dc.date.issued | 2017 | - |
dc.identifier.citation | Journal of Neural Engineering, 2017, v. 14 n. 2, p. 026013 | - |
dc.identifier.issn | 1741-2560 | - |
dc.identifier.uri | http://hdl.handle.net/10722/259417 | - |
dc.description.abstract | OBJECTIVE: Steady-state visual evoked potential (SSVEP)-based brain-computer interface (BCI) has been widely investigated because of its easy system configuration, high information transfer rate (ITR) and little user training. However, due to the limitations of brain responses and the refresh rate of a monitor, the available stimulation frequencies for practical BCI application are generally restricted. APPROACH: This study introduced a novel stimulation method using intermodulation frequencies for SSVEP-BCIs that had targets flickering at the same frequency but with different additional modulation frequencies. The additional modulation frequencies were generated on the basis of choosing desired flickering frequencies. The conventional frame-based 'on/off' stimulation method was used to realize the desired flickering frequencies. All visual stimulation was present on a conventional LCD screen. A 9-target SSVEP-BCI based on intermodulation frequencies was implemented for performance evaluation. To optimize the stimulation design, three approaches (C: chromatic; L: luminance; CL: chromatic and luminance) were evaluated by online testing and offline analysis. MAIN RESULTS: SSVEP-BCIs with different paradigms (C, L, and CL) enabled us not only to encode more targets, but also to reliably evoke intermodulation frequencies. The online accuracies for the three paradigms were 91.67% (C), 93.98% (L), and 96.41% (CL). The CL condition achieved the highest classification performance. SIGNIFICANCE: These results demonstrated the efficacy of three approaches (C, L, and CL) for eliciting intermodulation frequencies for multi-class SSVEP-BCIs. The combination of chromatic and luminance characteristics of the visual stimuli is the most efficient way for the intermodulation frequency coding method. | - |
dc.language | eng | - |
dc.publisher | Institute of Physics Publishing. The Journal's web site is located at http://www.iop.org/EJ/journal/JNE | - |
dc.relation.ispartof | Journal of Neural Engineering | - |
dc.rights | Journal of Neural Engineering. Copyright © Institute of Physics Publishing. | - |
dc.rights | This is an author-created, un-copyedited version of an article published in [insert name of journal]. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at http://dx.doi.org/[insert DOI]. | - |
dc.subject | brain-computer interface | - |
dc.subject | chromatic | - |
dc.subject | intermodulation frequencies | - |
dc.subject | luminance | - |
dc.subject | steady-state visual evoked potential | - |
dc.title | A novel stimulation method for multi-class SSVEP-BCI using intermodulation frequencies | - |
dc.type | Article | - |
dc.identifier.email | Hu, Y: yhud@hku.hk | - |
dc.identifier.authority | Hu, Y=rp00432 | - |
dc.identifier.doi | 10.1088/1741-2552/aa5989 | - |
dc.identifier.pmid | 28091397 | - |
dc.identifier.scopus | eid_2-s2.0-85015794624 | - |
dc.identifier.hkuros | 289673 | - |
dc.identifier.volume | 14 | - |
dc.identifier.issue | 2 | - |
dc.identifier.spage | 026013 | - |
dc.identifier.epage | 026013 | - |
dc.identifier.isi | WOS:000413826500006 | - |
dc.publisher.place | United Kingdom | - |
dc.identifier.issnl | 1741-2552 | - |