Time-time analysis of electroencephalogram signals for epileptic seizure detection
by Poonam Sheoran; J.S. Saini
International Journal of Biomedical Engineering and Technology (IJBET), Vol. 30, No. 2, 2019

Abstract: The detection and classification of epileptic seizures using the electroencphalogram (EEG) signals has been actively worked upon by the researchers from past few decades. This paper attempts a novel application of time-time transform for analysis of electroencephalogram time-series for epileptic seizure detection by transforming it into secondary time-limited local constituent time-series. This technique (TT-transform) of time-time representation of the EEG time series is derived from S-transform, i.e., Stockwell transform (an extension of the wavelets), a method that represents a non-stationary time series as a set of complex time-localised spectra. With the help of TT-transform, a more informative representation of the time features of EEG signals has been obtained, around a particular point on the time axis which has been seen to prove very effective in seizure detection. As the TT-transform is completely invertible, it indicates frequency filtering and signal to noise improvements in the time domain. Features obtained upon application of TT-transform on EEG time-series are classified using quadratic discriminant analysis and the correct classification rate obtained is 100%.

Online publication date: Thu, 04-Jul-2019

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