| 基于双门限的第一、第二心音自动识别方法 |
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| 引用本文： | 陈洁,侯海良,罗良才,成运.基于双门限的第一、第二心音自动识别方法[J].计算机工程,2012,38(16):174-177. |
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| 作者姓名： | 陈洁 侯海良 罗良才 成运 |
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| 作者单位： | 湖南人文科技学院通信与控制工程系 |
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| 基金项目： | 湖南省自然科学基金资助项目(07JJ6116);湖南省科技基金资助项目(06SK3106);湖南省教育厅优秀青年基金资助项目(09B053) |
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| 摘 要： | 为提高心音检测算法对异常心音的识别率，提出一种基于双门限的第一心音(S1)和第二心音(S2)自动识别方法，通过海明窗进行滤波预处理，采用改进型希尔伯特-黄变换提取心音包络，利用双门限法对心音进行分段，使用临床知识对S1和S2进行自动识别。实验结果表明，该方法能够准确识别正常心音和异常心音中的S1和S2。
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| 关 键 词： | 希尔伯特-黄变换 心音包络 经验模态分解 端点效应 双门限法 分段 |
| 收稿时间： | 2011-10-08 |
| 修稿时间： | 2011-12-06 |
Automatic Identification Method for the First and Second Heart Sound Based on Double-threshold |
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| CHEN Jie,HOU Hai-liang,LUO Liang-cai,CHENG Yun.Automatic Identification Method for the First and Second Heart Sound Based on Double-threshold[J].Computer Engineering,2012,38(16):174-177. |
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| Authors: | CHEN Jie HOU Hai-liang LUO Liang-cai CHENG Yun |
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| Affiliation: | (Department of Communications & Control Engineering,Hunan Institute of Humanities,Science and Technology,Loudi 417000,China) |
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| Abstract: | Although most existing heart sound detection algorithms perform well in normal signals,they usually have no effect on abnormal signals.In this paper,an algorithm based on double-threshold method is proposed for robust detection of the first heart sound(S1) and second heart sound(S2).The original Heart Sounds Signal(HSS) is preprocessed by filter based on Hamming window.The envelope of heart sounds is extracted by improved Hilbert Huang Transform(HHT) and segmentation of heart sounds is realized by double-threshold method.The first and second heart sound are recognized automatically by clinic knowledge.Reliability of this proposed approach is confirmed through identification of S1 and S2 on several normal and abnormal heart sounds. |
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| Keywords: | Hilbert Huang Transform(HHT) envelope of heart sound Empirical Mode Decomposition(EMD) end effect double-threshold method segmentation |
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