Method for Detecting at Least One Anomaly in an Observed Signal, Corresponding Computer Program Product and Device

摘要

A method is provided for detecting the presence of an anomaly within an observed physical signal. The observed signal includes an addition of a physical disturbance signal and a reference signal. The anomaly is relative to a change in the behavior of the reference signal compared with a first tolerance value. Such a method includes: determining a time span having at least one moment of interest; detecting the presence of the anomaly within the observed physical signal during the time span by conducting a hypothesis test using the first tolerance value, a first rate of tolerated false alarms, and data obtained from processing the observed signal.

主权项

1. A method for detecting presence of an anomaly Δ(t) included in an observed physical signal Y(t) representing progress of a patient's physiological parameters, said observed signal comprising an addition of a physical disturbance signal X(t), and a reference signal ƒ(t), and said anomaly being relative to a modification of the behavior of the reference signal ƒ(t) relative to a first tolerance value (τ,τ0), said method comprising:
determining a temporal set E comprising at least one instant of interest (tk; {t1, . . . , tK}); and detecting the presence of said anomaly within said observed physical signal in said temporal set E by carrying out a hypothesis test using said first tolerance value (τ,τ0), a first rate of tolerated false alarms (γ1), and data (p,Y) obtained from a processing of the observed signal Y(t).