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High-Speed Spelling in Virtual Reality with Sequential Hybrid BCIs
Zhaolin YAO Xinyao MA Yijun WANG Xu ZHANG Ming LIU Weihua PEI Hongda CHEN
IEICE TRANSACTIONS on Information and Systems
Publication Date: 2018/11/01
Online ISSN: 1745-1361
Type of Manuscript: LETTER
Category: Biological Engineering
brain-computer interface, steady-state visual evoked potentials, eye tracking, virtual reality, speller,
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A new hybrid brain-computer interface (BCI), which is based on sequential controls by eye tracking and steady-state visual evoked potentials (SSVEPs), has been proposed for high-speed spelling in virtual reality (VR) with a 40-target virtual keyboard. During target selection, gaze point was first detected by an eye-tracking accessory. A 4-target block was then selected for further target selection by a 4-class SSVEP BCI. The system can type at a speed of 1.25 character/sec in a cue-guided target selection task. Online experiments on three subjects achieved an averaged information transfer rate (ITR) of 360.7 bits/min.