A wavelet-based approach for the extraction of event related potentials from EEG

TitleA wavelet-based approach for the extraction of event related potentials from EEG
Publication TypeConference Paper
Year of Publication2004
AuthorsFatourechi, M., S. G. Mason, G. E. Birch, and R. K. Ward
Conference NameAcoustics, Speech, and Signal Processing, 2004. Proceedings. (ICASSP '04). IEEE International Conference on
Paginationii - 737-40 vol.2
Date Publishedmay.
Keywordsbrain functions, EEG, electroencephalography, event related potentials extraction, low-frequency ERP events, medical signal processing, SCS, signal denoising, single trial analysis, statistical coefficient selection, wavelet transforms, wavelet-based denoising methods

Event related potentials (ERPs) are of interest to many researchers seeking knowledge about the functions of the brain. ERPs are low-frequency events that are usually obscured in single trial analysis. To visualize these signals; most of the reliable solutions at the present time use the ensemble averages of many single trials. In this paper, a wavelet-based method called statistical coefficient selection (SCS) is used for the extraction of ERPs from EEG signals. Unlike other wavelet-based denoising methods, the current method does not focus on the wavelet coefficients of the signal itself. Instead, it selects the coefficients based on the statistical study of trials from training data sets. Simulation results show the superiority of the proposed SCS method in extracting ERPs in comparison with other filtering approaches.


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