基于DSP的心电信号实时滤波算法的实现

摘要

介绍数字心电图的心电信号处理中实时滤波算法的实现,探讨针对心电信号的工频干扰、肌电和基线漂移的实时数字滤波方法,在数字心电图的DSP芯片平台上选取有效的滤波算法分别用于消除和抑制基线漂移、工频干扰及肌电干扰.实验表明,在DSP上实现的心电数字滤波方法能达到预定设计要求,具有实时性、有效性等优点,并成功地应用到国家医药管理局攻关项目的十二导联数字心电图机上.%This paper introduces the ECG(electrocardiogram) real-time filtering algorithms for power-line interference, electro-myography noise, and base-line drift, and implemented by a digital signal processor on digital ECG instrument. In order to get high quality ECG signal, a notch filter is used to eliminate the power-line noise with base-line shift and a low-pass filter is used to eliminate the muscle noise. The experiment results prove that the filtering algorithms have the advantages of fast speed and effectual effect.