A P300-based Hangul input system with a hierarchical stimulus presentation paradigm

Tae Hoon Lee, Tae Eui Kam, Sung Phil Kim

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

We propose a hierarchical stimulus presentation paradigm for a P300-based Hangul (Korean script) input system. A P300-based input system is one of the most promising non-invasive brain-computer interface (BCI) applications based on its direct applicability in many computer programs. While the previous row/column stimulus presentation paradigm has been well-suited to the English input, it may not be optimal for a Hangul input because Hangul has a distinct hierarchical structure. To overcome the limitation of the previous paradigms, we developed a new P300-based Hangul input system by taking the unique hierarchical structure of Hangul into account for creating a hierarchical stimulus presentation paradigm. By using the hierarchical structure, we can effectively reduce the window size of the interface without loss of classification accuracy. A performance comparison shows that the hierarchical paradigm exhibits higher classification accuracy than the row/column paradigm even with a smaller window size. Thus the proposed hierarchical paradigm is more efficient to spell Hangul and will be more useful for BCI-based Hangul input for a text messenger, e-mail program, word processor, and so on.

Original languageEnglish
Title of host publicationProceedings - International Workshop on Pattern Recognition in NeuroImaging, PRNI 2011
Pages21-24
Number of pages4
DOIs
Publication statusPublished - 2011
EventInternational Workshop on Pattern Recognition in NeuroImaging, PRNI 2011 - Seoul, Korea, Republic of
Duration: 2011 May 162011 May 18

Publication series

NameProceedings - International Workshop on Pattern Recognition in NeuroImaging, PRNI 2011

Other

OtherInternational Workshop on Pattern Recognition in NeuroImaging, PRNI 2011
Country/TerritoryKorea, Republic of
CitySeoul
Period11/5/1611/5/18

Keywords

  • Brain-computer interface
  • Hangul speller
  • Hierarchical stimulus presentation paradigm
  • P300

ASJC Scopus subject areas

  • Computer Vision and Pattern Recognition
  • Biomedical Engineering
  • Radiology Nuclear Medicine and imaging

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