In-vehicle communication signal processing
First Claim
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1. A system comprising:
- a feedback filter configured to receive an audio signal from a microphone and to process the audio signal based on a feedback path between a loudspeaker and the microphone;
a second feedback filter configured to receive the audio signal from the microphone and to process the audio signal based on a second feedback path between a second loudspeaker and the microphone, wherein the second feedback path is distinct from the feedback path;
an adaptive filter coupled to the feedback filter and to the second feedback filter; and
a signal combiner coupled to the microphone and to the adaptive filter.
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Abstract
A system includes a feedback filter configured to receive an audio signal from a microphone and to process the audio signal based on a feedback path between a loudspeaker and the microphone. The system also includes an adaptive filter coupled to the feedback filter. The system further includes a signal combiner coupled to the microphone and to the adaptive filter.
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Citations
24 Claims
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1. A system comprising:
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a feedback filter configured to receive an audio signal from a microphone and to process the audio signal based on a feedback path between a loudspeaker and the microphone; a second feedback filter configured to receive the audio signal from the microphone and to process the audio signal based on a second feedback path between a second loudspeaker and the microphone, wherein the second feedback path is distinct from the feedback path; an adaptive filter coupled to the feedback filter and to the second feedback filter; and a signal combiner coupled to the microphone and to the adaptive filter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 23, 24)
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10. A method for in-vehicle communication, the method comprising:
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receiving an audio signal from a microphone of a vehicle; processing the audio signal to at least partially cancel a feedback portion of the audio signal and to at least partially cancel a second feedback portion of the audio signal, the feedback portion corresponding to an output of a loudspeaker of the vehicle and the second feedback portion corresponding to a second output of a second loudspeaker of the vehicle, wherein processing the audio signal includes; generating a filtered signal based on the audio signal; generating a second filtered signal based on the audio signal; generating a cancellation signal at least partially based on the filtered signal and the second filtered signal; and adaptively filtering the cancellation signal to generate a filtered cancellation signal; and combining the filtered cancellation signal with the audio signal to generate a modified audio signal. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A non-transitory computer-readable medium comprising instructions for in-vehicle communication, the instructions, when executed by a processor, cause the processor to perform operations comprising:
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processing an audio signal from a microphone of a vehicle to at least partially cancel a feedback portion of the audio signal and to at least partially cancel a second feedback portion of the audio signal, the feedback portion corresponding to an output of a loudspeaker of the vehicle and the second feedback portion corresponding to a second output of a second loudspeaker of the vehicle, wherein processing the audio signal includes; generating a filtered signal; generating a second filtered signal based on the audio signal; generating a cancellation signal at least partially based on the filtered signal and the second filtered signal; and adaptively filtering the cancellation signal to generate a filtered cancellation signal; and combining the filtered cancellation signal with the audio signal to generate a modified audio signal. - View Dependent Claims (19, 20)
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21. An apparatus for in-vehicle communication, the apparatus comprising:
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means for processing an audio signal from a microphone of a vehicle to at least partially cancel a feedback portion of the audio signal, the feedback portion corresponding to an output of a loudspeaker of the vehicle and to a second output of a second loudspeaker of the vehicle, the means for processing including; means for generating a filtered signal; second means for generating a second filtered signal; means for generating a cancellation signal at least partially based on the filtered signal and the second filtered signal; and means for adaptively filtering the cancellation signal to generate a filtered cancellation signal; and means for combining the filtered cancellation signal with the audio signal to generate a modified audio signal. - View Dependent Claims (22)
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Specification