Apparatus and method for processing signal
AssigneeIndustrial Technology Research Institute
InventorsSun-Hua Pao, Chieh-Neng Young, Tsung-Min Hsieh, Yio-Wha Shau
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Abstract
An apparatus and a method for processing signal are provided. The signal processing apparatus comprises an input interface and a processing unit. The input interface receives smoothing parameters and a to-be-separated signal. The processing unit establishes an upper extreme envelope and a lower extreme envelope of the to-be-separated signal, and calculates a mean envelope between the upper extreme envelope and the lower extreme envelope. The processing unit performs smoothing according to the smoothing parameters and the mean envelope to generate a smoothed mean envelope, and determines a trend component or a non-trend component according to the smoothed mean envelope.
Claims27
A signal processing method, comprising:
- receiving smoothing parameters and a to-be-separated signal, wherein the to-be-separated signal is generated according to a physiological signal, and the smoothing parameters are adjusted according to the physiological signal;
- establishing an upper extreme envelope and a lower extreme envelope of the to-be-separated signal, wherein the upper extreme envelope and the lower extreme envelope respectively represent every local maxima and every local minima of the to-be-separated signal;
- calculating a mean envelope between the upper extreme envelope and the lower extreme envelope;
- performing smoothing according to the smoothing parameters and the mean envelope to generate a smoothed mean envelope;
- determining a trend component or a non-trend component of the to-be-separated signal according to the smoothed mean envelope, wherein the trend component represents tendency of the to-be-separated signal, and the non-trend component of the to-be-separated signal represents fluctuation on the trend component;
- and
- using the trend component to represent a physiological signal of a patient representative of a health aspect of the patient.
A signal processing apparatus, comprising:
- an input interface used for receiving smoothing parameters and a to-be-separated signal, wherein the to-be-separated signal is generated according to a physiological signal, and the smoothing parameters are adjusted according to the physiological signal;
- and
- a processing unit used for
- establishing an upper extreme envelope and a lower extreme envelope of the to-be-separated signal, wherein the upper extreme envelope and the lower extreme envelope respectively represent every local maxima and every local minima of the to-be-separated signal,
- calculating a mean envelope between the upper extreme envelope and the lower extreme envelope, wherein the processing unit performs smoothing according to the smoothing parameters and the mean envelope to generate a smoothed mean envelope, and determines a trend component or a non-trend component of the to-be-separated signal according to the smoothed mean envelope, wherein the trend component represents tendency of the to-be-separated signal, and the non-trend component of the to-be-separated signal represents fluctuation on the trend component;
- and
- using the trend component to represent a physiological signal of a patient representative of a health aspect of the patient.
Dependencies are inferred from the claim text.