Wavelet Transform

Ahsrr-ucr-This paper describes the application of an artificial neural network (ANN) technique together with a feature extraction technique, viz., the wavelet transform, for the classification of EEG signals. Three classes of EEG signals were used: Normal, Schizophrenia (SCH), and Obsessive Compulsive Disorder (OCD). The architecture of the artificial neural network used in the classification is a three-layered feedforward network which implements the backpropagation of error learning algorithm. After training, the network with wavelet coefficients was able to correctly classify over 66 % of the normal class and 71 % of the schizophrenia class of EEG’s. The wavelet transform thus provides a potentially powerful technique for preprocessing EEG signals prior to classification. Kejwords- EEG Classification, Neural Networks