OPTIMIZATION OF PRINCIPAL COMPONENT ANALYSIS AND SUPPORT VECTOR MACHINE FOR THE RECOGNITION OF INFANT CRY WITH ASPHYXIA

Rohilah Sahak, Wahidah Mansor, Khuan Y. Lee, Azlee Zabidi, and Ahmad I.M. Yassin

Keywords

Infant cry, asphyxia, principal component analysis, support vectormachine

Abstract

The optimization of principal component analysis–support vector machine (PCA–SVM) for recognizing infant cry with asphyxia is presented in this paper. Three types of PCA selection techniques such as cumulative percent of variance, eigenvalue-one-criterion and scree test were employed to select significant features of Melfrequency cepstrum coefficient that is extracted from normal and asphyxia cry. The asphyxiated infant cries were differentiated from normal cries using SVM with linear and radial basis function (RBF) kernels. The performance of the PCA–SVM in recognizing asphyxiated infant cries was compared with the SVM (without PCA) to prove its efficiency. Classification accuracy and support vector number were computed to examine the performance of both techniques. The results show that PCA–SVM is the best technique for recognizing asphyxiated infant cries since it produces the highest classification accuracy (95.323%). The RBF kernel with optimal regularization of 100 and γ = 0.025 should be used in the PCA–SVM technique.

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