Energy Distribution of EEG Signals: EEG Signal Wavelet-Neural Network Classifier
This work addresses EEG classification for medical diagnosis, but it is incremental as it applies established methods (wavelet transforms and neural networks) to a specific dataset.
The authors tackled EEG signal classification by combining wavelet-based energy feature extraction with a neural network, achieving efficient recognition across 300 EEG signals from healthy subjects, epilepsy patients, and those with epileptic syndrome during seizures.
In this paper, a wavelet-based neural network (WNN) classifier for recognizing EEG signals is implemented and tested under three sets EEG signals (healthy subjects, patients with epilepsy and patients with epileptic syndrome during the seizure). First, the Discrete Wavelet Transform (DWT) with the Multi-Resolution Analysis (MRA) is applied to decompose EEG signal at resolution levels of the components of the EEG signal (delta, theta, alpha, beta and gamma) and the Parsevals theorem are employed to extract the percentage distribution of energy features of the EEG signal at different resolution levels. Second, the neural network (NN) classifies these extracted features to identify the EEGs type according to the percentage distribution of energy features. The performance of the proposed algorithm has been evaluated using in total 300 EEG signals. The results showed that the proposed classifier has the ability of recognizing and classifying EEG signals efficiently.