Heart sound segmentation method and device based on Butterworth filter and Shannon entropy method
A Shannon entropy and filter technology, which is applied in speech analysis, instruments, stethoscopes, etc., can solve problems such as segmentation errors, and achieve the effect of improving accuracy and high recognizability
Pending Publication Date: 2020-08-14
GUANGDONG UNIV OF TECH
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[0005] The present invention provides a heart sound segmentation method based on the Butterworth filter and Shannon entropy method, which is used to solve the problem that the existing heart sound segmentation method is affected by noise and causes segmentation errors
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[0056] An embodiment of the present invention provides a heart sound segmentation method based on the Butterworth filter and Shannon entropy method, which is used to solve the problem that the existing heart sound segmentation method is affected by noise and causes segmentation errors.
[0057] In order to make the purpose, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the following The described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0058] see figure 1 , figure 1 A flow chart of th...
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The invention discloses a heart sound segmentation method and device based on a Butterworth filter and a Shannon entropy method, and the heart sound segmentation method and device are used for solvingthe problem of segmentation errors of an existing heart sound segmentation method due to noise influence. The heart sound segmentation method comprises the following steps of acquiring an initial heart sound signal; filtering the initial heart sound signal by adopting the Butterworth filter to obtain a preprocessed heart sound signal; performing envelope extraction on the preprocessed heart soundsignal by adopting the Shannon entropy method to obtain a heart sound envelope signal, wherein the heart sound envelope signal comprises a first heart sound signal and a second heart sound signal; determining a starting time point and an ending time point of the first heart sound signal or the second heart sound signal in the heart sound envelope signal by adopting a preset first threshold valueand a preset second threshold value; and segmenting the heart sound envelope signal by adopting the starting time point and the ending time point. Through the embodiment of the invention, the problemof the segmentation errors of the existing heart sound segmentation method due to the noise influence is solved.
Description
technical field [0001] The present invention relates to the technical field of heart sound segmentation, in particular to a heart sound segmentation method and device based on Butterworth filter and Shannon entropy method. Background technique [0002] Cardiovascular disease has long been the world's number one killer that seriously endangers human life and health, and the proportion of cardiovascular disease deaths in the global disease death toll remains high. Early detection and intervention through auxiliary diagnosis is the best way to reduce the damage caused by cardiovascular diseases to human life and health, and heart sound signal analysis is one of the most commonly used auxiliary diagnostic methods for cardiovascular diseases. [0003] Heart sound refers to the sound produced by the vibration caused by myocardial contraction and relaxation, heart valve opening and closing, blood hitting the wall of the ventricle and the wall of the aorta. Heart sound signals can ...
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Login to View More IPC IPC(8): A61B7/04G10L25/27G10L25/48
CPCA61B7/04A61B7/003G10L25/27G10L25/48
Inventor 李贺罗钊川黄梓欣黄泽茵李世杰佘烁康陈沛琪李柔仪
Owner GUANGDONG UNIV OF TECH