Emotion recognition based on speech signals by combiningempirical mode decomposition and deep neural network

Abstract

This paper proposes a novel method for speech emotion recognition. Empirical mode decomposition (EMD) isapplied in this paper for the extraction of emotional features from speeches, and a deep neural network (DNN)is used to classify speech emotions. This paper enhances the emotional components in speech signals by usingEMD with acoustic feature Mel-Scale Frequency Cepstral Coefficients (MFCCs) to improve the recognition ratesof emotions from speeches using the classifier DNN. In this paper, EMD is first used to decompose the speechsignals, which contain emotional components into multiple intrinsic mode functions (IMFs), and then emotionalfeatures are derived from the IMFs and are calculated using MFCC. Then, the emotional features are used to trainthe DNN model. Finally, a trained model that could recognize the emotional signals is then used to identify emotionsin speeches. Experimental results reveal that the proposed method is effective.