Cross-Subject Transfer Learning on High-Speed Steady-State Visual Evoked Potential-Based Brain-Computer Interfaces

10/05/2018
by   Kuan-Jung Chiang, et al.
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Steady-state visual evoked potential (SSVEP)-based brain computer-interfaces (BCIs) have shown its robustness in achieving high information transfer rate. State-of-the-art training-based SSVEP decoding methods such as extended Canonical Correlation Analysis (CCA) and Task-Related Component Analysis (TRCA) are the major players that elevate the efficiency of the SSVEP-based BCIs through an individualized calibration process. However, collecting sufficient calibration (e.g. training templates) data could be laborious and time-consuming, hindering the practicality in a real-world context. This study aims to develop a cross-subject transferring approach to reduce the need for training data from a new user. Study results showed that a new least-squares transformation (LST) method was able to significantly reduce the training templates required for a 40-class TRCA-based SSVEP BCI. The LST method may lead to numerous practical applications of plug-and-play high-speed SSVEP-based BCIs.

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