Research on Pretreatment and Envelope Extraction Algorithm of Heart Sound Signal_Journal of Biomedical Engineering

Authors：

ZHANGLeibang , TANGRongbin , JIANGJianbo , ZHANGShuai ,  CHIZonglin , WANGWeilian

Information School, Yunnan University, Kunming 650500, China;

Corresponding author：

CHIZonglin, Email: zlchi@ynu.edu.cn

Keywords：

heart sound signal; preprocessing; envelope extraction; wavelet transform; Hilbert-Huang transform; mathematical morphology; normalized average Shannon energy

DOI：

10.7507/1001-5515.20140137

Video：

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In this work, a new method of heart sound signal preprocessing is presented. First, the heart sound signals are decomposed by using multilayer wavelet transform. And then double parameters as thresholds are used in processing each layer after decomposition for denoising. Next, reconstruction of heart sound signals could be done after processing last layer. Four methods, i.e. wavelet transform, Hilbert-Huang transform (HHT), mathematical morphology, and normalized average Shannon energy, were used to extract the envelop of the heart sound signals respectively after reconstruction of heart sounds. All methods were improved in this study. We finally in our study chose 30 cases of raw heart sound signals, which were selected randomly from a database comed from The Clinical Medicine Institute of Montreal, and processed them by using the improved methods. The results were satisfactory. It showed that the extracted envelope with the original signal has a high degree of matching, whether it is a low frequency portion or high frequency portion. Most of all information of heart sound has been maintained in the envelope.

Citation： ZHANGLeibang, TANGRongbin, JIANGJianbo, ZHANGShuai, CHIZonglin, WANGWeilian. Research on Pretreatment and Envelope Extraction Algorithm of Heart Sound Signal. Journal of Biomedical Engineering, 2014, 31(4): 734-741. doi: 10.7507/1001-5515.20140137 Copy

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17.	葛哲学.精通Matlab[M].北京:电子工业出版社,2008:151-152.
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19.	徐成斌.心音图学仁[M].北京:科学技术出版社,1982:1-16.
20.	TRANANIAS P E. Anapproach to QRS complexes detection using matical morphology[J]. IEEE Trans on BME, 1993, 40(2): 201-205.
21.	郭兴明,陈剑,肖守中.基于数学形态学的心音信号识别方法[J].生物医学工程学杂志,2004,21(5):832-835.
22.	陈剑.心音信号自动分析与识别算法的研究[D].重庆:重庆大学,2003:1-53.

1. BAYKAL A, IDER YZ, KÖYMEN H. Distribution of aortic mechanical prosthetic valve closure sound model parameters on the surface of the chest[J]. IEEE Trans Biomed Eng, 1995, 42(4): 358-370.
2. WANG W, GUO Z, YANG J, et al. Analysis of the first heart sound using the matching pursuit method[J]. Med Biol Eng Comput, 2001, 39(6): 644-648.
3. 胡晓,王威廉.基于小波变换心音定位[J].生物医学工程与临床,2002,6(4):181-184.
4. ZHOU S, JUDITH D Z, WU X M, et al. Envelope extraction algorithm and phonocardiogram signal application based on wavelet transform[J]. Zhongguo Zuzhi Gongcheng Yanjiu yu Linchuang Kangfu, 2011, 15(30): 5615-5619.
5. 姚晓帅,郭兴明,陈剑,等.基于数学形态学的心音包络提取与识别方法研究[J].北京生物医学工程,2004,23(3):201-204.
6. 屠志海.心音信号的分析方法研究[D].上海:华东师范大学,2011:1-69.
7. 陈萌辉,叶大田,陈江天.基于信号包络及短时过零率的心音分段算法[J].北京生物医学工程,2007,26(1):48-51.
8. 王芸.基于小波变换的心音信号分析研究[D].成都:四川大学,2005:1-55.
9. 王典,刘财,刘洋.刘国昌基于提升算法和百分位数软阈值的小波去噪技术[J].地球物理学进展,2008,23(4):1124-1130.
10. 吴玉春.心音信号自动识别算法的研究[D].重庆:重庆大学,2009:1-57.
11. 李延军,曹中平,严洪,等.基于局部峰谷点差值提取心音包络的一种新方法[J].航天医学与医学工程,2010,23(2):133-136.
12. 胡玉良,王海滨,陈健,等.心音时域分析的新方法研究[J].生物医学工程学杂志,2010,27(2):425-428.
13. 许晓飞,林勇,严彬彬.基于希尔伯特-黄变换的心音包络提取[J].航天医学与医学工程,2008,21(2):134-136.
14. 薛伟,关福宏,陈良章,等.基于一种新的小波阈值函数的雷达信号去噪[J].计算机仿真,2008,25(8):319-322.
15. 张莲,秦华峰,余成波.基于小波阈值去噪算法的研究[J].计算机工程与应用,2008,44(9):172-173,199.
16. 刘卫东,刘尚合,胡小锋,等.小波阈值去噪函数的改进方法分析[J].高电压技术,2007,33(10):59-63.
17. 葛哲学.精通Matlab[M].北京:电子工业出版社,2008:151-152.
18. WANG X P, LI Y Y, SUN C R, et al. Deteetion of the first and seeond heart sound using heart sound energy[J].Biomed Eng Inf, 2009: 1-4.
19. 徐成斌.心音图学仁[M].北京:科学技术出版社,1982:1-16.
20. TRANANIAS P E. Anapproach to QRS complexes detection using matical morphology[J]. IEEE Trans on BME, 1993, 40(2): 201-205.
21. 郭兴明,陈剑,肖守中.基于数学形态学的心音信号识别方法[J].生物医学工程学杂志,2004,21(5):832-835.
22. 陈剑.心音信号自动分析与识别算法的研究[D].重庆:重庆大学,2003:1-53.

Journal of Biomedical Engineering

Research on Pretreatment and Envelope Extraction Algorithm of Heart Sound Signal

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