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Apparatus and method for processing signal

  • US 9,314,176 B2
  • Filed: 04/19/2012
  • Issued: 04/19/2016
  • Est. Priority Date: 05/31/2011
  • Status: Active Grant
First Claim
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1. A signal processing method, comprising:

  • receiving smoothing parameters and a to-be-separated signal, wherein the to-be-separated signal is generated according to a physiological signal, and the smoothing parameters are adjusted according to the physiological signal;

    establishing an upper extreme envelope and a lower extreme envelope of the to-be-separated signal, wherein the upper extreme envelope and the lower extreme envelope respectively represent every local maxima and every local minima of the to-be-separated signal;

    calculating a mean envelope between the upper extreme envelope and the lower extreme envelope;

    performing smoothing according to the smoothing parameters and the mean envelope to generate a smoothed mean envelope;

    determining a trend component or a non-trend component of the to-be-separated signal according to the smoothed mean envelope, wherein the trend component represents tendency of the to-be-separated signal, and the non-trend component of the to-be-separated signal represents fluctuation on the trend component; and

    using the trend component to represent a physiological signal of a patient representative of a health aspect of the patient.

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