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- W2897048111 abstract "This paper proposes a new technique for the identification of fundamental heart sounds (HSs), namely, $S_{1}$ and $S_{2}$ from the cardiac cycle, the first and foremost step in the automated HSs analysis for the detection of pathological events, without incorporating time-interval informations between $S_{1}$ and $S_{2}$ or electrocardiogram signal as reference. The motive of this paper is to demonstrate that the reliable $S_{1}$ and $S_{2}$ classification performances based on the combinatory feature (CF) derived from higher order moments and cepstral-based domain can still be achieved, under the circumstances where the timing interval information might not be easily understood due to cardiac abnormalities. Using deep neural networks approach, a stacked autoencoder (SAE) based on the CF is proposed for the classification of fundamental HSs. Experiments are conducted on both publicly available and recorded HSs signals for the validation of the proposed method. The SAE using the proposed CF achieves better classification results in recognizing $S_{1}$ and $S_{2}$ in comparison to well-known classifiers such as deep belief neural network, support vector machine, Naive Bayes, linear discriminant analysis, and boosting ensemble. The proposed method shows higher classification rate in terms of accuracy, sensitivity, and specificity by considering CF, which uses Mel-frequency cepstral coefficients and its derivative features. A second approach for addressing the problem of $S_{1}$ and $S_{2}$ identifications is carried out by employing 1-D convolutional neural network that uses the signals directly to learn the relevant features by its own for the recognition." @default.
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- W2897048111 date "2019-09-01" @default.
- W2897048111 modified "2023-10-12" @default.
- W2897048111 title "Characterization of $S_1$ and $S_2$ Heart Sounds Using Stacked Autoencoder and Convolutional Neural Network" @default.
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- W2897048111 doi "https://doi.org/10.1109/tim.2018.2872387" @default.
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