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In this paper an automatic heart sound segmentation scheme is proposed using Teager-Kaiser energy operator (TKEO) in Hilbert space. After pre-processing the heart sound signal, Hilbert envelope is computed and filtering is performed to obtain smooth envelope. TKEO is applied to this envelope signal to find more accurate boundaries of heart sounds. This energy operator depends only on first two time...
In this paper a heart sound segmentation algorithm in multiresolution domain is proposed. Wavelet decomposition of heart sound signal grossly segments its components into different subbands. If multiscale Hilbert envelope is computed on reconstructed signals at different scales, it provides suitable markers for first and second heart sound boundaries. The selection of wavelet subband for marker generation...
Electrical activity of the heart recorded by a 12-lead Electrocardiogram is important in detecting cardiac abnormalities. The 12-leads can be seen as the components of heart vector which originates from the center of the heart. These components spread over the frontal and transverse plane and have information about various parts of the heart. Increasing the number of these components will increase...
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