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US 11,633,158 B2Granted
Filtering system and filtering method
AssigneeQuanta Computer Inc.
InventorsPei-Sheng Wu, Peng-Zhe Tsai, Yung-Ming Chung
Life of this patent
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Abstract
A filtering method includes the following steps: receiving an sound signal; decomposing the sound signal into a primary lung sound signal and a reference heart sound signal; adjusting the reference heart sound signal according to a weighted value to generate an adjusted heart sound signal; and subtracting the adjusted heart sound signal from the primary lung sound signal to generate a filtered lung sound signal.
Claims7
A filtering system, comprising:
- an input and output interface, configured to receive an sound signal;
- and
- an adaptive filtering device, configured to decompose the sound signal into a primary lung sound signal and a reference heart sound signal, adjust the reference heart sound signal according to a weighted value to generate an adjusted heart sound signal, and subtract the adjusted heart sound signal from the primary lung sound signal to generate a filtered lung sound signal;
- wherein the adaptive filtering device further comprises:
- a bandpass filter, configured to filter the sound signal into a filtered signal of 20-300 hertz (Hz) as the reference heart sound signal;
- and
- an adaptive filter, configured to generate the weighted value, and subtract the adjusted heart sound signal from the primary lung sound signal to output the filtered lung sound signal;
- wherein a step size of the adaptive filter is less than 0.03.
5 more elements
A filtering method, comprising:
- receiving an sound signal;
- decomposing the sound signal into a primary lung sound signal and a reference heart sound signal;
- adjusting the reference heart sound signal according to a weighted value to generate an adjusted heart sound signal, wherein the weighted value is generated by an adaptive filter, and a step size of the adaptive filter is less than 0.03;
- subtracting the adjusted heart sound signal from the primary lung sound signal to generate a filtered lung sound signal;
- and
- filtering the sound signal into a filtered signal of 20-300 hertz (Hz) as the reference heart sound signal.
3 more elements
Dependencies are inferred from the claim text.