中国医学装备
中國醫學裝備
중국의학장비
CHINA MEDICAL EQUIPMENT
2014年
3期
16-19
,共4页
心电信号%基线漂移%提升小波%特征参数
心電信號%基線漂移%提升小波%特徵參數
심전신호%기선표이%제승소파%특정삼수
Electrocardiogram%Baseline wander%Lifting wavelet%Characteristic parameters
目的：避免传统小波变换基于卷积算法中的冗余计算，同时去除心电信号(ECG)在采集中混入其中的基线漂移噪声。方法：根据提升小波变换采取双小波基函数结合的方法，经分解、含噪声子带系数置零、逆变换形成去噪的心电信号。结果：运用MATLAB环境对MIT-BIH数据库提供的心电信号数据及基线漂移噪声信号bw进行去除基线漂移仿真验证，其基线漂移均被有效去除。结论：ECG信号经该方法处理后其所含有的基线漂移噪声被准确去除，且原信号中的波形信息被有效保留，可为心电信号特征参数的检测提供帮助。
目的：避免傳統小波變換基于捲積算法中的冗餘計算，同時去除心電信號(ECG)在採集中混入其中的基線漂移譟聲。方法：根據提升小波變換採取雙小波基函數結閤的方法，經分解、含譟聲子帶繫數置零、逆變換形成去譟的心電信號。結果：運用MATLAB環境對MIT-BIH數據庫提供的心電信號數據及基線漂移譟聲信號bw進行去除基線漂移倣真驗證，其基線漂移均被有效去除。結論：ECG信號經該方法處理後其所含有的基線漂移譟聲被準確去除，且原信號中的波形信息被有效保留，可為心電信號特徵參數的檢測提供幫助。
목적：피면전통소파변환기우권적산법중적용여계산，동시거제심전신호(ECG)재채집중혼입기중적기선표이조성。방법：근거제승소파변환채취쌍소파기함수결합적방법，경분해、함조성자대계수치령、역변환형성거조적심전신호。결과：운용MATLAB배경대MIT-BIH수거고제공적심전신호수거급기선표이조성신호bw진행거제기선표이방진험증，기기선표이균피유효거제。결론：ECG신호경해방법처리후기소함유적기선표이조성피준학거제，차원신호중적파형신식피유효보류，가위심전신호특정삼수적검측제공방조。
Objective:To avoid the redundant computation based on the convolution operation in the traditional wavelet transform, and to remove the baseline wander noise existing in the course of collecting the ECG signal. Methods: Use the lifting wavelet transform with two wavelets, and constitute the ECG signal with the noise removed after decomposing, setting the subband coefficient including the noise to zero, and rebuilding. Results:Use MATLAB to remove the baseline wander noise in the ECG signal and bw provided by the MIT-BIH database, and the results show that the baseline wander was removed effectively. Conclusion:The baseline wander noise in the ECG signal can be removed accurately though the method mentioned above, the waveform information in the original ECG signal can be maintained effectively, and subsequently, that can provide help for detecting the characteristic parameters in the ECG signal.
