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Processing of Photoplethysmography Signals

  • US 20090043179A1
  • Filed: 08/08/2007
  • Published: 02/12/2009
  • Est. Priority Date: 08/08/2007
  • Status: Active Grant
First Claim
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1. A method of isolating an AC and DC component from a stream of plethysmography signals comprising identifying the peaks and troughs of said plethysmography signals;

  • identifying the midpoints or minimum values between said peaks and troughs, wherein the interpolated line connecting said midpoints or minimum values represents said DC component;

    extracting said DC component from said plethysmography signals, thereby separately obtaining said AC component, whereby an AC component and DC component are individually isolated.

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