Systems and methods for distributed adaptive noise cancellation
First Claim
1. An integrated circuit, comprising:
- an output for providing a signal to a transducer including both source audio for playback to a listener and an anti-noise signal for countering the effects of ambient audio sounds in an acoustic output of the transducer;
a microphone input for receiving a microphone signal indicative of ambient audio sounds at the transducer;
a link control input for receiving link control information of a communications link coupling the integrated circuit to one or more of the transducer and a microphone for generating the microphone signal, wherein the link control information includes a link quality metric of the communications link; and
a processing circuit comprising an adaptive filter having a response that generates the anti-noise signal in conformity with the microphone signal to minimize the ambient audio sounds at the acoustic output of the transducer, wherein the processing circuit modifies generation of the anti-noise signal by modifying adaptation of the adaptive filter responsive to the link quality metric.
3 Assignments
0 Petitions
Accused Products
Abstract
An integrated circuit may include an output for providing a signal to a transducer including both source audio for playback to a listener and an anti-noise signal for countering the effects of ambient audio sounds in an acoustic output of the transducer, a microphone input for receiving a microphone signal indicative of ambient sounds at the transducer, a link control input for receiving link control information of a communications link coupling the integrated circuit to the transducer and/or a microphone for generating the microphone signal, wherein the link control information includes a link quality metric of the communications link, and a processing circuit comprising a filter having a response that generates the anti-noise signal in conformity with the microphone signal to minimize the ambient sounds at the acoustic output of the transducer, wherein the processing circuit modifies generation of the anti-noise signal responsive to the link quality metric.
19 Citations
24 Claims
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1. An integrated circuit, comprising:
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an output for providing a signal to a transducer including both source audio for playback to a listener and an anti-noise signal for countering the effects of ambient audio sounds in an acoustic output of the transducer; a microphone input for receiving a microphone signal indicative of ambient audio sounds at the transducer; a link control input for receiving link control information of a communications link coupling the integrated circuit to one or more of the transducer and a microphone for generating the microphone signal, wherein the link control information includes a link quality metric of the communications link; and a processing circuit comprising an adaptive filter having a response that generates the anti-noise signal in conformity with the microphone signal to minimize the ambient audio sounds at the acoustic output of the transducer, wherein the processing circuit modifies generation of the anti-noise signal by modifying adaptation of the adaptive filter responsive to the link quality metric. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method comprising:
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receiving link control information of a communications link configured to couple an integrated circuit to one or more of;
(i) a transducer for generating sound in response to a signal including both source audio for playback to a listener and an anti-noise signal for countering the effects of ambient audio sounds in an acoustic output of the transducer and (ii) a microphone for generating a microphone signal indicative of ambient audio sounds at the transducer, wherein the link control information includes a link quality metric of the communications link; andgenerating with an adaptive filter the anti-noise signal in conformity with the microphone signal to minimize the ambient audio sounds at the acoustic output of the transducer; and modifying generation of the anti-noise signal by modifying adaptation of the adaptive filter responsive to the link quality metric. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A distributed active noise cancellation (ANC) system, comprising:
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link control circuitry for receiving link control information of a communications link, wherein the link control information includes a link quality metric of the communications link; and ANC circuitry for actively cancelling noise, wherein the ANC circuitry comprises an adaptive filter and modifies generation of the anti-noise signal by modifying adaptation of the adaptive filter responsive to the link quality metric. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
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Specification