计算机工程 ›› 2010, Vol. 36 ›› Issue (7): 279-281.doi: 10.3969/j.issn.1000-3428.2010.07.096

• 开发研究与设计技术 • 上一篇    下一篇

3σ规则和µ律阈值法在心音信号去噪中的应用

郭兴明1,柯 明1,肖守中1,2   

  1. (1. 重庆大学生物工程学院重庆市医疗电子工程技术研究中心,重庆 400030;2. 重庆博精医学信息研究所,重庆 400030)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2010-04-05 发布日期:2010-04-05

Application of 3σ-Rule and µ-Threshold Method in Heart Sound Signal De-noising

GUO Xing-ming1, KE Ming1, XIAO Shou-zhong1,2   

  1. (1. Chongqing Medical Electronics Engineering Technology Research Center, College of Bioengineering, Chongqing University, Chongqing 400030; 2. Bojing Medical Information Institute, Chongqing 400030)
  • Received:1900-01-01 Revised:1900-01-01 Online:2010-04-05 Published:2010-04-05

摘要: 讨论小波包阈值法去噪的机理,提出基于小波包变换的3σ规则和µ律阈值法在心音信号预处理中的方法,该方法保留小波包变换去噪的优势,能够有效地突出心音的特征部分,在心杂音信号去噪中有较好的效果。实验结果表明,该方法在去除干扰和心杂音上有着一定的优势,在心音信号检测中有重要的应用价值。

关键词: 小波包变换, 3σ规则, µ, 律阈值法, 心音, 去噪

Abstract: This paper discusses the principle of wavelet packet transform threshold de-noising used for restraining noise in nonstationary signal and puts forward a method of using 3σ-rule and µ-threshold method based on wavelet packet transform to pre-process the heart sounds. The method retains the advantages of normal wavelet packet transform in signal processing, and projects heart sounds’ features. Experimental results show that the method has a significant advantage on de-noising and heart murmurs processing, and it has a very good application foreground in heart sounds detection.

Key words: wavelet packet transform, 3σ-rule, µ, #NAME?, heart sound, de-noising

中图分类号: