Mr. Y.G. Ku Profile

Y.G. Ku

at Tokyo Denki Univ

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Proceedings Article | 12 April 2004 Paper

Nonstationary signal analysis in episodic memory retrieval

Y. G. Ku, Masashi Kawasumi, Masao Saito

Proceedings Volume 5439, (2004) https://doi.org/10.1117/12.541295

KEYWORDS: Electroencephalography, Independent component analysis, Signal analysis, Signal processing, Brain, Signal analyzers, Eye

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The problem of blind source separation from a mixture that has nonstationarity can be seen in signal processing, speech processing, spectral analysis and so on. This study analyzed EEG signal during episodic memory retrieval using ICA and TVAR. This paper proposes a method which combines ICA and TVAR. The signal from the brain not only exhibits the nonstationary behavior, but also contain artifacts. EEG data at the frontal lobe (F3) from the scalp is collected during the episodic memory retrieval task. The method is applied to EEG data for analysis. The artifact (eye movement) is removed by ICA, and a single burst (around 6Hz) is obtained by TVAR, suggesting that the single burst is related to the brain activity during the episodic memory retrieval.

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