Abstract
A major obstacle in generalizing brain-computer interface (BCI) systems to previously unseen subjects is the subject variability of electroencephalography (EEG) signals. To deal with this problem, the existing methods focus on domain adaptation with subject-specific EEG data, which are expensive and time consuming to collect. In this paper, domain generalization methods are introduced to reduce the influence of subject variability in BCI systems without requiring any information from unseen subjects. We first modify a deep adversarial network for domain generalization and then propose a novel adversarial domain generalization framework, DResNet, in which domain information is utilized to learn two components of weights: unbiased weights that are common across subjects and biased weights that are subject-specific. Experimental results on two public EEG datasets indicate that our proposed methods can achieve a performance comparable to and more stable than that of the state-of-the-art domain adaptation method. In contrast to existing domain adaptation methods, our proposed domain generalization approach does not require any data from test subjects and can simultaneously generalize well to multiple test subjects.
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Acknowledgments
This work was supported in part by the grants from the National Key Research and Development Program of China (Grant No. 2017YFB1002501), the National Natural Science Foundation of China (Grant No. 61673266), and the Fundamental Research Funds for the Central Universities.
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Ma, BQ., Li, H., Zheng, WL., Lu, BL. (2019). Reducing the Subject Variability of EEG Signals with Adversarial Domain Generalization. In: Gedeon, T., Wong, K., Lee, M. (eds) Neural Information Processing. ICONIP 2019. Lecture Notes in Computer Science(), vol 11953. Springer, Cham. https://doi.org/10.1007/978-3-030-36708-4_3
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