Reducing noise in a biological signal
First Claim
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1. A method of reducing noise in a biological signal, the method comprising:
- acquiring a biological signal;
generating a predicted signal using a representative signal;
subtracting the predicted signal from the biological signal to produce a second signal;
applying a filter to the second signal to produce a filtered signal; and
combining the predicted signal and the filtered signal to produce a noise-reduced signal.
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Abstract
A method of reducing noise in a biological signal, such as an ECG signal, includes acquiring a biological signal, comparing the biological signal to a representative signal, and generating a predicted signal corresponding to the representative signal when the biological signal sufficiently matches the representative signal. The predicted signal is subtracted from the biological signal to produce a second signal, and a filter is applied to the second signal to produce a filtered signal. The predicted signal and the filtered signal then are combined to produce a noise-reduced signal.
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Citations
31 Claims
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1. A method of reducing noise in a biological signal, the method comprising:
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acquiring a biological signal; generating a predicted signal using a representative signal; subtracting the predicted signal from the biological signal to produce a second signal; applying a filter to the second signal to produce a filtered signal; and combining the predicted signal and the filtered signal to produce a noise-reduced signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of reducing noise in an ECG signal, the method comprising:
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acquiring an ECG signal; generating a predicted signal using a representative signal; subtracting the predicted signal from the ECG signal to produce a second signal; applying a filter to the second signal to produce a filtered signal; and combining the predicted signal and the filtered signal to produce a noise-reduced ECG signal. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. A system for reducing noise in a biological signal, the system comprising:
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means for acquiring a biological signal; means for generating a predicted signal using a representative signal; means for subtracting the predicted signal from the biological signal to produce a second signal; means for applying a filter to the second signal to produce a filtered signal; and means for combining the predicted signal and the filtered signal to produce a noise-reduced signal.
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31. A method of reducing noise in an ECG signal, the method comprising:
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acquiring an ECG signal; maintaining a set of one or more representative signals corresponding to different ECG beat morphologies; comparing a beat of the ECG signal to a representative signal for an ECG beat morphology to select a representative signal; generating a predicted signal using the selected representative signal; subtracting the predicted signal from the ECG signal to produce a second signal; applying a low pass filter to the second signal to produce a filtered signal; and combining the predicted signal and the filtered signal to produce a noise-reduced ECG signal.
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Specification