Signal processing apparatus and method

  • US 8,180,420 B2
  • Filed: 08/20/2007
  • Issued: 05/15/2012
  • Est. Priority Date: 04/14/1997
  • Status: Expired due to Fees
First Claim
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1. A noninvasive physiological monitor comprising:

  • a signal processor communicating with a detector responsive to light attenuated by body tissue, said detector producing a detector output waveform, said signal processor receiving said detector output waveform and configured to transform said detector output waveform into spectral data, said signal processor further configured to identify spectral peaks and frequencies corresponding to said spectral peaks from said spectral data, and configured to apply a plurality of rules to said spectral peaks and said corresponding frequencies in order to determine pulse rate estimate.

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