Publication Type:

Conference Paper


Twentieth National Conference on Communications (NCC), 2014 (2014)


Acoustics, audio-visual stethoscope, automated PCG signal delineation method, background noises, candidate waveform, endpoint determination, filtering theory, hard-thresholding rule, Heart, Heart sound analysis, Hilbert transformation, Hilbert transforms, medical signal processing, Noise measurement, noisy pathological PCG signals, nonpathological PCG signals, peak-amplitude determination, Phonocardiography, real-time wireless cardiac health monitoring, Signal to noise ratio, smooth energy envelope computation, total variation filtering


This paper presents an automated PCG signal delineation method for real-time wireless cardiac health monitoring and audio-visual stethoscope applications. The proposed method comprises the steps of: preprocessing, total variation filtering, smooth energy envelope computation, peak-amplitude determination and endpoint determination. The total variation filter is used to smooth out the background noises and preserves the heart sound components. The endpoints of heart sounds (S1, S2, S3, S4 and murmurs) are determined by using smooth energy envelope and hard-thresholding rule. The peaks of the heart sounds are determined by using candidate waveform obtained from Hilbert transformation of smooth envelope. The proposed delineation method is validated by using different clean and noisy pathological and non-pathological PCG signals. Experiments on a large PCG database show that the proposed method achieves an average sensitivity (Se) of 99.56% and positive predictivity (+P) of 96.97%, with the maximum average delineation error of 9.08-msec, 0.483-msec and 7.834-msec for endpoints of heart sounds, peak-locations and durations, respectively.


cited By (since 1996)0; Conference of org.apache.xalan.xsltc.dom.DOMAdapter@2d58750d ; Conference Date: org.apache.xalan.xsltc.dom.DOMAdapter@a6cbfbd Through org.apache.xalan.xsltc.dom.DOMAdapter@69a016a3; Conference Code:105206

Cite this Research Publication

V. N. Varghees and Ramachandran, K. I., “Automated PCG signal delineation method for heart sound analysis”, in Twentieth National Conference on Communications (NCC), 2014 , 2014.