A Novel Method for Extraction of Heart Sounds Envelope Based on Interpolation of Local Peak and Valley Points
- VernacularTitle:基于局部峰谷点插值提取心音包络的一种新方法
- Author:
Yanjun LI
;
Zhongping CAO
;
Hong YAN
;
Ming WEI
- Publication Type:Journal Article
- Keywords:
heart sound;
phonocardiogram (PCG);
envelope extraction;
local extremum;
Hilbert transform (HT);
mathematical morphology
- From:Space Medicine & Medical Engineering
2006;0(02):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To extract envelope of heart sounds exactly,for the purpose of the further analysis of its characteristics.Methods The way that envelope extraction of heart sounds based on key-points was given.The points of local peak and valley were calculated firstly,and then heart sound envelope was gotten by the interpolation of these points.Results Compared with the envelope extracted by Hilbert-transform and mathematical morphology,respectively,the outline of heart sounds was extracted more accurately,and its time-domain characters were acquired by this method.Conclusion The envelope of heart sound is extracted correctly by this method,which is useful for the further analysis.
