摘要
介绍了一种新的心音去噪方法,利用小波域多尺度积的方法定位第1、第2心音在各个心音周期的位置,并利用其持续时间估计有用信号及噪声,达到去噪的效果,避免了通过ECG-Gating在时域提取噪声时的误差.比较信号在处理前后各个频段的频谱变化,结果表明,该方法不仅在效果上比已有方法更好,在计算上也更为便利.
The paper presents a new heart sound denoise method, which uses multiscale product to locate the first sound（ S1 ） and second sound（ S2 ） in each heart beat cycle and the durations of S1 and S： to estimate these signals and the noise, avoiding the undesirable error caused by using ECG-Gating to locate the S1 and S2. By comparing spectrum changes in each frequency segment with other methods, the new methode is shown to he a more robust extraction method, and is a convenience in computing.
出处
《江南大学学报（自然科学版）》
CAS
2008年第5期526-530,共5页
Joural of Jiangnan University (Natural Science Edition)
基金
国家自然科学基金项目(60503027)
关键词
心音
多尺度积
心电门控
heart sound
muhiscale product
ECG-Gating
