BETA: A Large Benchmark Database Toward SSVEP-BCI Application

• Published in: Frontiers in neuroscience Vol. 14; p. 627
• Main Authors: Liu, Bingchuan, Huang, Xiaoshan, Wang, Yijun, Chen, Xiaogang, Gao, Xiaorong
• Format: Journal Article
• Language: English
• Published: Switzerland Frontiers Research Foundation 23.06.2020; Frontiers Media S.A
• Subjects: Brain; brain-computer interface (BCI); classification algorithms; Computer applications; EEG; electroencephalogram (EEG); frequency recognition; Implants; Keyboards; Neuroscience; Noise; Population levels; public database; steady-state visual evoked potential (SSVEP); User experience; Visual evoked potentials; classification algorithms; public database; signal-to-noise ratio (SNR); brain-computer interface (BCI); frequency recognition; electroencephalogram (EEG); steady-state visual evoked potential (SSVEP)
• ISSN: 1662-453X; 1662-4548; 1662-453X
• DOI: 10.3389/fnins.2020.00627

The brain-computer interface (BCI) provides an alternative means to communicate and it has sparked growing interest in the past two decades. Specifically, for Steady-State Visual Evoked Potential (SSVEP) based BCI, marked improvement has been made in the frequency recognition method and data sharing. However, the number of pubic databases is still limited in this field. Therefore, we present a nchmark database owards BCI pplication (BETA) in the study. The BETA database is composed of 64-channel Electroencephalogram (EEG) data of 70 subjects performing a 40-target cued-spelling task. The design and the acquisition of the BETA are in pursuit of meeting the demand from real-world applications and it can be used as a test-bed for these scenarios. We validate the database by a series of analyses and conduct the classification analysis of eleven frequency recognition methods on BETA. We recommend using the metric of wide-band signal-to-noise ratio (SNR) and BCI quotient to characterize the SSVEP at the single-trial and population levels, respectively. The BETA database can be downloaded from the following link http://bci.med.tsinghua.edu.cn/download.html.