Patent ID: 9451898
Filing Date: 2016-09-27
CPC Classification: A61B

Claim Text:
1. A computer-implemented method for extracting a Ventricular fibrillation (VF) signal in Electrocardiography (ECG), the method comprising: (A) receiving an ECG signal; (B) adding a plurality of shadowing functions to the ECG signal, to obtain a plurality of modification signals, wherein each pair of shadowing functions is conjugate and has same phase difference; (C) decomposing the plurality of modification signals by using an Empirical Mode Decomposition (EMD) method, to generate a plurality of Intrinsic Mode Functions (IMFs); (D) calculating the sum of IMFs in different frequency regions based on time sequence, dividing by a number of the shadowing signal, to obtain a plurality of modification intrinsic mode functions; (E) combining the plurality of modification IMFs with the same property, to obtain a shape function; (F) modeling the shape function, to obtain a compression signal; and (G) subtracting the compression signal from the ECG signal based on time sequence, to obtain the VF signal.