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Signal processing warping technique

  • US 8,840,562 B2
  • Filed: 09/13/2010
  • Issued: 09/23/2014
  • Est. Priority Date: 09/24/2009
  • Status: Active Grant
First Claim
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1. A method for measuring a physiological parameter of a human, comprising the acts of:

  • analyzing, by using a processor, an energy density of a signal having a physiological component and a non-physiological component to determine one or more changes in the energy density of the signal over time;

    determining, by using the processor, based on the one or more changes in the energy density of the signal over time, a warping function configured to enable identification of characteristics of the signal corresponding to the non-physiological component;

    stretching or compressing along a time scale, by using the processor, the signal having the physiological component and the non-physiological component by using the warping function to produce a warped signal;

    stretching or compressing, by using the processor, a signal quality indicator by using the warping function to produce a warped signal quality indicator;

    identifying, by using the processor, the non-physiological component of the signal based on an analysis of the warped signal with the warped signal quality indicator; and

    using the physiological component of the signal and disregarding the non-physiological component of the signal to determine the physiological parameter.

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