计算机与数字工程Issue(6)：957-959,3.DOI:10.3969/j.issn1672-9722.2015.06.004
基于平稳小波变换心音信号阈值去噪的对比分析磁
Comparison and Analysis of Heart Sound Signal Threshold Denoising Based on Stationary Wavelet Transform
摘要
Abstract
To remove three kinds of noise in heart sound signal including environmental noise、powerline interference and electromyographical interference and obtain the optimal denoising method of heart sounds ,based on stationary wavelet transform ,heart sound signal is decomposed into three layers using db5 wavelet .Hard threshold function and soft threshold function are applied to high frequency coefficients respectively .Then ,the comparison and analysis of denoising effect are car‐ried by Sqtwolog , Rigrsure , Heursure , Minimaxi , Penalizd high , Penalizd medium and Penalizd low threshold . Hard threshold denoising effect is better than the soft threshold and the Rigrsur threshold method is the best in all the thresholds . Rigrsur threshold method based on stationary wavelet transform can achieve good denoising effect and effectively remove vari‐ety of noise of heart sound signal .关键词
心音信号/平稳小波变换/阈值函数/阈值/阈值去噪Key words
heart sound signal/stationary wavelet transform/threshold function/threshold/threshold denoising分类
医药卫生引用本文复制引用
高清河,刚晶,王和禹..基于平稳小波变换心音信号阈值去噪的对比分析磁[J].计算机与数字工程,2015,(6):957-959,3.基金项目
辽宁中医药大学非医药专业项目（编号601152）资助。 （）
