Patent Document ID: 9392976
Application ID: 13609533
Patent Status: 1

Claim One:
1. A subject monitoring pulse oximetry system for determining physiological information of a subject, comprising: a pulse oximetry sensor configured to generate an intensity signal, wherein the pulse oximetry sensor detects light attenuated by the subject; and a pulse oximetry processor coupled to the pulse oximetry sensor, wherein the pulse oximetry processor is configured to: calculate a first autocorrelation sequence of an optical intensity signal derived from the intensity signal; calculate a second autocorrelation sequence of the optical intensity signal, wherein the second autocorrelation sequence uses a template of a different size than used in the calculation of the first autocorrelation sequence; combine the first autocorrelation sequence and the second autocorrelation sequence; and determine a value indicative of physiological information of the subject based on the combined autocorrelation sequence, wherein the physiological information comprises pulse rate; and a display configured to display the value indicative of the physiological information.