Method for detecting and attenuating inhalation noise in a communication system
First Claim
1. A method for detecting and attenuating inhalation noise in a communication system coupled to a pressurized air delivery system, the method comprising the steps of:
- generating an inhalation noise model based on inhalation noise generated by a pressurized air delivery system, wherein the noise model is represented as a deterministic digital filter based at least on an autocorrelation sequence derived from at least one digitized sample of inhalation noise;
receiving an input signal that includes inhalation noise;
comparing the input signal to the noise model to obtain a similarity measure;
determining a gain factor based on the similarity measure; and
modifying the input signal based on the gain factor, wherein the inhalation noise in the input signal is attenuated based on the gain factor.
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Abstract
A method for detecting and attenuating inhalation noise in a communication system coupled to a pressurized air delivery system, the method including the steps of: generating an inhalation noise model (912, 1012) based on inhalation noise; receiving an input signal (802) that includes inhalation noise; comparing (810) the input signal to the noise model to obtain a similarity measure; determining (854) a gain factor based on the similarity measure; and modifying (852) the input signal based on the gain factor, wherein the inhalation noise in the input signal is attenuated based on the gain factor.
58 Citations
21 Claims
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1. A method for detecting and attenuating inhalation noise in a communication system coupled to a pressurized air delivery system, the method comprising the steps of:
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generating an inhalation noise model based on inhalation noise generated by a pressurized air delivery system, wherein the noise model is represented as a deterministic digital filter based at least on an autocorrelation sequence derived from at least one digitized sample of inhalation noise; receiving an input signal that includes inhalation noise; comparing the input signal to the noise model to obtain a similarity measure; determining a gain factor based on the similarity measure; and modifying the input signal based on the gain factor, wherein the inhalation noise in the input signal is attenuated based on the gain factor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A device for detecting and attenuating inhalation noise in a communication system coupled to a pressurized air delivery system, comprising:
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a processing element; and a memory element coupled to the processing element for storing a computer program for instructing the processing device to perform the steps of; generating an inhalation noise model based on inhalation noise generated by a pressurized air delivery system, wherein the noise model is represented as a deterministic digital filter based at least on an autocorrelation sequence derived from at least one digitized sample of inhalation noise; receiving an input signal that includes inhalation noise; comparing the input signal to the noise model to obtain a similarity measure; determining a gain factor based on the similarity measure; and modifying the input signal based on the gain factor, wherein the inhalation noise in the input signal is attenuated based on the gain factor. - View Dependent Claims (20)
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21. A system for detecting and attenuating inhalation noise comprising:
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a pressurized air delivery system; and a communication system coupled to the pressurized air delivery system, the system comprising; a processing element; and a memory element coupled to the processing element for storing a computer program for instructing the processing device to perform the steps of; generating an inhalation noise model based on inhalation noise generated by a pressurized air delivery system, wherein the noise model is represented as a deterministic digital filter based at least on an autocorrelation sequence derived from at least one digitized sample of inhalation noise; receiving an input signal that includes inhalation noise; comparing the input signal to the noise model to obtain a similarity measure; determining a gain factor based on the similarity measure; and modifying the input signal based on the gain factor, wherein the inhalation noise in the input signal is attenuated based on the gain factor.
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Specification