Method and apparatus to detect and remove audio disturbances
First Claim
1. A method for processing an audio signal, comprising operations of:
- receiving a signal composed of a harmonic portion and a disturbance portion;
reducing an amplitude associated with the harmonic portion of the audio signal;
decreasing a sampling rate of the audio signal having the reduced amplitude of the harmonic portion;
identifying a type of signal sequence associated with the disturbance portion of the audio signal; and
modifying the disturbance portion according to the type of the signal sequence.
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Accused Products
Abstract
A method for reducing noise disturbance associated with an audio signal received through a microphone is provided. The method initiates with magnifying a noise disturbance of the audio signal relative to a remaining component of the audio signal. Then, a sampling rate of the audio signal is decreased. Next, an even order derivative is applied to the audio signal having the decreased sampling rate to define a detection signal. Then, the noise disturbance of the audio signal is adjusted according to a statistical average of the detection signal. A system capable of canceling disturbances associated with an audio signal, a video game controller, and an integrated circuit for reducing noise disturbances associated with an audio signal are included.
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Citations
44 Claims
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1. A method for processing an audio signal, comprising operations of:
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receiving a signal composed of a harmonic portion and a disturbance portion;
reducing an amplitude associated with the harmonic portion of the audio signal;
decreasing a sampling rate of the audio signal having the reduced amplitude of the harmonic portion;
identifying a type of signal sequence associated with the disturbance portion of the audio signal; and
modifying the disturbance portion according to the type of the signal sequence. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for reducing a noise disturbance associated with an audio signal received through a microphone, comprising operations of:
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magnifying a noise disturbance of the audio signal relative to a remaining component of the audio signal;
decreasing a sampling rate of the audio signal;
applying an even order derivative to the audio signal having the decreased sampling rate to define a detection signal; and
adjusting the noise disturbance of the audio signal according to a statistical average of the detection signal. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A computer readable medium having program instructions for processing an audio signal, comprising:
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program instructions for receiving a signal composed of a harmonic portion and a disturbance portion;
program instructions for reducing an amplitude associated with the harmonic portion of the audio signal;
program instructions for decreasing a sampling rate of the audio signal having the reduced amplitude of the harmonic portion;
program instructions for identifying a type of signal sequence associated with the disturbance portion of the audio signal; and
program instructions for modifying the disturbance portion according to the type of the signal sequence. - View Dependent Claims (15, 16, 17, 18, 19)
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20. A computer readable medium having program instructions for reducing a noise disturbance associated with an audio signal received through a microphone, comprising operations of:
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program instructions for magnifying a noise disturbance of the audio signal relative to a remaining component of the audio signal;
program instructions for decreasing a sampling rate of the audio signal;
program instructions for applying an even order derivative to the audio signal having the decreased sampling rate to define a detection signal; and
program instructions for adjusting the noise disturbance of the audio signal according to a statistical average of the detection signal. - View Dependent Claims (21, 22, 23, 24, 25, 26)
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27. A system capable of canceling disturbances associated with an audio signal, comprising:
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a computing device including logic for processing an audio signal, the logic for processing the audio signal including, logic for generating a detection signal from the audio signal; and
logic for determining whether a signal sequence of the audio signal is a disturbance through analysis of a corresponding signal sequence of the detection signal;
an input device operatively connected to the computing device; and
a microphone configured to capture the audio signal, wherein the microphone is positioned so that a source of the disturbance is located within a near-field associated with the microphone and a source of a target component of the audio signal is located within a far field associated with the microphone. - View Dependent Claims (28, 29, 30, 31, 32, 33)
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34. A video game controller, comprising:
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a microphone affixed to the video game controller, the microphone configured to detect an audio signal that includes a target audio signal in a far field relative to the microphone and disturbance noise in a near field relative to the microphone;
logic configured to process the audio signal, the logic including, detection signal logic configured to generate a detection signal through application of an even ordered derivative to the audio signal; and
disturbance cancellation logic configured to remove disturbance noise from the audio signal through analysis of the detection signal. - View Dependent Claims (35, 36, 37)
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38. An integrated circuit, comprising:
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circuitry configured to receive an audio signal from at least one microphone in a multiple noise source environment;
circuitry configured to perform signal decorrelation on the audio signal;
circuitry configured to downsample the decorrelated audio signal;
circuitry configured to apply a differentiation operation to the downsampled audio signal;
circuitry configured to detect a noise disturbance signal sequence within the differentiated audio signal; and
circuitry configured to remove a signal sequence of the audio signal associated with the noise disturbance signal sequence. - View Dependent Claims (39, 40, 41, 42, 43, 44)
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Specification