基于循环平稳特性的心音信号噪声评价指标

被引：13

作者：

李婷 ^{[1
,2
]}

邱天爽 ^{[1
]}

唐洪 ^{[1
]}

机构：

[1] 不详

[2] 大连理工大学电子信息与电气工程学部

[3] 不详

[4] 大连民族学院信息与通信工程学院

[5] 不详

来源：

计算机工程与应用 | 2012年 / 24期

关键词：

心音信号; 循环平稳; 噪声评价指标;

D O I：

暂无

中图分类号：

TN911.4 [噪声与干扰];

学科分类号：

摘要：

采用计算机来分析心音信号引起了越来越多的研究人员的关注,但是,心音信号在采集过程中常常会受到各种噪声的干扰,如何评价心音信号受噪声影响的程度就成为一个重要的问题。提出了一种基于循环平稳特性的心音信号噪声评价指标——质量因子,它能够准确地、定量地评估心音信号的噪声情况,即质量因子越大,信号受噪声的影响越小。如果实际采集的心音信号比较长,那么计算整个信号的质量因子,把质量因子最大的那一段心音信号取出来进行处理,这样可以大大减少去除噪声等预处理过程,节省了计算量和时间。所提出来的质量因子,对于正常和异常心音信号都适用,计算机完全可以自动计算,无需人工干预。

引用

页码：10 / 14

页数：5

共 9 条

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