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http://dx.doi.org/10.7776/ASK.2010.29.2.133

New Temporal Features for Cardiac Disorder Classification by Heart Sound  

Kwak, Chul (충북대학교 전자정보대학 제어로봇공학과)
Kwon, Oh-Wook (충북대학교 전자정보대학 제어로봇공학과)
Abstract
We improve the performance of cardiac disorder classification by adding new temporal features extracted from continuous heart sound signals. We add three kinds of novel temporal features to a conventional feature based on mel-frequency cepstral coefficients (MFCC): Heart sound envelope, murmur probabilities, and murmur amplitude variation. In cardiac disorder classification and detection experiments, we evaluate the contribution of the proposed features to classification accuracy and select proper temporal features using the sequential feature selection method. The selected features are shown to improve classification accuracy significantly and consistently for neural network-based pattern classifiers such as multi-layer perceptron (MLP), support vector machine (SVM), and extreme learning machine (ELM).
Keywords
Heart Sound Classification; Feature Extraction; Extreme Learning Machine (ELM);
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Times Cited By KSCI : 2  (Citation Analysis)
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