Method for detecting and attenuating inhalation noise in a communication system
AssigneeMotorola, Inc.
InventorsSara M. Harton, Mark A. Jasiuk, William M. Kushner
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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.
Claims21
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.
A device for detecting and attenuating inhalation noise in a communication system coupled to a pressurized air delivery 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.
A system for detecting and attenuating inhalation noise comprising:
- 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.
Dependencies are inferred from the claim text.