基于S变换的心音信号特征提取

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振动与冲击 ›› 2012, Vol. 31 ›› Issue (21) : 179-183.

论文

基于S变换的心音信号特征提取

李战明1 ，韩阳1 ，韦哲2 ，周强1

作者信息 +

Heart sound feature extraction based on S transform

Li Zhanming1 Han Yang1 Wei Zhe2 Zhou Qiang1

Author information +

文章历史 +

摘要

为了准确获得心音信号生理、病理信息，在对比研究各种时频分析方法的基础上，采用具有良好时频分辨率的S变换提取心音信号特征，实现心脏病辅助诊断。首先对心音信号进行包络提取、第一心音定位及心音分段，然后对一个周期信号进行S变换，最后提取变换后矩阵的统计学特征，并将该特征作为区别不同心音信号的特征向量。通过相关评价可知该方法可以有效识别不同心音信号。

Abstract

To search a suitable time-frequency analysis method in kinds of time-frequency analysis methods for heart sound, which has good time-frequency resolution to display the features of different heart sounds in order to assist heart diseases diagnose. Firstly, extract the heart sound envelope, locate the first heart sound and segmentation, then get S transform of a circle, finally, make the S transform statistics features of heart sounds as eigenvectors. The relative evaluation method showed this method can recognize different heart sounds.

导出引用

李战明;韩阳;韦哲;周强. 基于S变换的心音信号特征提取[J]. 振动与冲击, 2012, 31(21): 179-183

Li Zhanming Han Yang Wei Zhe Zhou Qiang. Heart sound feature extraction based on S transform[J]. Journal of Vibration and Shock, 2012, 31(21): 179-183