METHOD AND APPARATUS FOR REMOVING PERIODIC NOISE PULSES IN AN AUDIO SIGNAL
First Claim
1. A method for removing periodic noise pulses from a continuous audio signal generated in a pressurized air delivery system, the method comprising the steps of:
- detecting, in a time-windowed segment of the continuous audio signal generated in the pressurized air delivery system, a plurality of the periodic noise pulses having a pulse period and being representable in the form of a plurality of signal components combined by convolution;
deconvolving the plurality of signal components to generate a plurality of deconvolved signal components; and
removing at least a portion of the periodic noise pulses from the time-windowed segment of the continuous audio signal using the deconvolved signal components.
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Abstract
A method for removing periodic noise pulses from a continuous audio signal generated in a pressurized air delivery system includes the steps of: detecting, in a time-windowed segment of the continuous audio signal generated in the pressurized air delivery system, a plurality of the periodic noise pulses having a pulse period and being representable in the form of a plurality of signal components combined by convolution; deconvolving the plurality of signal components to generate a plurality of deconvolved signal components; and removing at least a portion of the periodic noise pulses from the time-windowed segment of the continuous audio signal using the deconvolved signal components.
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Citations
20 Claims
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1. A method for removing periodic noise pulses from a continuous audio signal generated in a pressurized air delivery system, the method comprising the steps of:
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detecting, in a time-windowed segment of the continuous audio signal generated in the pressurized air delivery system, a plurality of the periodic noise pulses having a pulse period and being representable in the form of a plurality of signal components combined by convolution; deconvolving the plurality of signal components to generate a plurality of deconvolved signal components; and removing at least a portion of the periodic noise pulses from the time-windowed segment of the continuous audio signal using the deconvolved signal components. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A device for removing low-air alarm noise pulses from a continuous audio signal generated in a pressurized air delivery system, the device comprising:
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an interface receiving the continuous audio signal; and a processing device coupled to the interface and; detecting, in a time-windowed segment of the continuous audio signal, a plurality of the low-air alarm noise pulses having a pulse period and being representable in the form of a plurality of signal components combined by convolution; deconvolving the plurality of signal components using cepstral deconvolution to generate a plurality of deconvolved cepstrum signal components; and removing at least a portion of the low-air alarm noise pulses from the time-windowed segment of the continuous audio signal using the deconvolved cepstrum signal components. - View Dependent Claims (14, 15, 16)
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17. A computer-readable storage element having computer readable code stored thereon for programming a computer to perform a method for removing periodic noise pulses from a continuous audio signal generated in a pressurized air delivery system, the method comprising the steps of:
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detecting, in a time-windowed segment of the continuous audio signal generated in the pressurized air delivery system, a plurality of the periodic noise pulses having a pulse period and being representable in the form of a plurality of signal components combined by convolution; deconvolving the plurality of signal components to generate a plurality of deconvolved signal components; and removing at least a portion of the periodic noise pulses from the time-windowed segment of the continuous audio signal using the deconvolved signal components. - View Dependent Claims (18, 19, 20)
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Specification