摘要: 针对心电信号处理中基线漂移噪声难以消除的问题,提出一种基于小波域数字滤波的基线漂移去噪算法。采用提升小波分解心电信号,对最高层尺度系数做数字高通滤波处理,并重构得到去除基线漂移的信号。对MIT/BIH数据库中含噪原始心电数据进行仿真实验,结果表明,该算法在计算复杂度和性能方面能取得比传统算法更好的平衡,在10 dB的信噪比下,其均方误差仅为0.001 8。
关键词:
心电信号,
基线漂移,
提升小波,
高通滤波器,
滑动平均滤波,
中值滤波
Abstract: To solve the problem of processing removal noise of electrocardiosignal Baseline Wander(BW), this paper presents a denoising algorithm based on digital filtering in wavelet domain. The electrocardiosignal is decomposited with the lifting wavelet, then processed through the digital high-pass filter on the highest level of scale coefficients and reconstructed with the removed baseline wander. Based on the noisy electrocardiosignal data in the MIT/BIH database, simulation studies on the proposed algorithm are done. Compared with traditional methods, simulation results show that the proposed algorithm achieves a better balance between computational complexity and performance. MSE of the proposed algorithm is only 0.001 8 in 10 dB SNR condition.
Key words:
electrocardiosignal,
Baseline Wander(BW),
lifting wavelet,
high-pass filter,
moving-average filtering,
median filtering
中图分类号:
殷俊鹏, 田应洪, 赖宗声, 严琼. 基于小波域数字滤波的心电信号BW去噪算法[J]. 计算机工程, 2013, 39(3): 267-271.
YAN Dun-Feng, TIAN Ying-Hong, LAI Zong-Qing, YAN Qiong. Electrocardiosignal Baseline Wander Denoising Algorithm Based on Digital Filtering in Wavelet Domain[J]. Computer Engineering, 2013, 39(3): 267-271.