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    • 25. 发明申请
    • METHOD AND APPARATUS FOR REDUCING CONTAMINATION OF AN ELECTRICAL SIGNAL
    • 减少电子信号污染的方法和装置
    • WO0213689A3
    • 2003-08-21
    • PCT/US0125480
    • 2001-08-15
    • UNIV CALIFORNIACOHEN MARK S
    • COHEN MARK S
    • G01R33/28A61B5/04A61B5/0476A61B5/055G06F17/00
    • A61B5/04004A61B5/04017A61B5/4094
    • The method of reducing contamination of electrical signals recorded in the presence of repeated interference contamination comprises obtaining an electrical signal recorded in the presence of a contaminating signal, and detecting a timing signal that occurs at a fixed time point during the electrical signal relative to the onset of the contaminating signal. The electrical signal is digitized, wherein the digitizing begins with the timing signal. A plurality of digitized electrical signals is analyzed, wherein the electrical signals are synchronized with respect to the timing signal, to obtain an estimated contaminating signal that is subtracted from the digitized electrical signal. This method can be used with electrophysiological signals, such as EEG, ECG, EMG and galvanic skin response, and for elimination of noise associated with concurrently used methods such as MRI. The method of noise reduction is applicable to recordings of other electrical signals, including audio recordings.
    • 在存在重复的干扰污染的情况下减少记录的电信号的污染的方法包括获得在存在污染信号的情况下记录的电信号,以及检测在电信号期间相对于发生的固定时间点发生的定时信号 的污染信号。 电信号被数字化,其中数字化以定时信号开始。 分析多个数字化电信号,其中电信号相对于定时信号同步,以获得从数字化电信号中减去的估计污染信号。 该方法可用于电生理信号,如EEG,ECG,EMG和电流皮肤反应,以及消除与同时使用的方法如MRI相关的噪声。 噪声降低的方法适用于包括音频记录在内的其他电信号的记录。