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EEG-Transformer: Self-attention from Transformer Architecture for Decoding EEG of Imagined Speech

2021-12-15 15:16:40
Young-Eun Lee, Seo-Hyun Lee

Abstract

Transformers are groundbreaking architectures that have changed a flow of deep learning, and many high-performance models are developing based on transformer architectures. Transformers implemented only with attention with encoder-decoder structure following seq2seq without using RNN, but had better performance than RNN. Herein, we investigate the decoding technique for electroencephalography (EEG) composed of self-attention module from transformer architecture during imagined speech and overt speech. We performed classification of nine subjects using convolutional neural network based on EEGNet that captures temporal-spectral-spatial features from EEG of imagined speech and overt speech. Furthermore, we applied the self-attention module to decoding EEG to improve the performance and lower the number of parameters. Our results demonstrate the possibility of decoding brain activities of imagined speech and overt speech using attention modules. Also, only single channel EEG or ear-EEG can be used to decode the imagined speech for practical BCIs.

Abstract (translated)

URL

https://arxiv.org/abs/2112.09239

PDF

https://arxiv.org/pdf/2112.09239.pdf


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