Multi-speaker method and apparatus for leakage cancellation
First Claim
1. A multi-speaker system for reducing undesired leakage energy, the multi-speaker system comprising:
- a non-front-facing speaker configured to be positioned away from a listening area;
a plurality of front-facing speakers configured to be positioned facing the listening area;
a processor configured to apply an input audio signal to the non-front-facing speaker, the non-front-facing speaker configured to transmit the input audio signal such that the input audio signal acoustically propagates along a direct path to the listening area; and
a plurality of filters, wherein each filter in the plurality of filters corresponds to a front-facing speaker in the plurality of front-facing speakers, and wherein each filter in the plurality of filters is configured to;
generate an attenuating signal, andapply the attenuating signal to a corresponding front-facing speaker,wherein the plurality of attenuating signals collectively attenuate the input audio signal acoustically propagated by the non-front-facing speaker along the direct path to the listening area.
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Abstract
Embodiments of systems and methods are described for reducing undesired leakage energy produced by a non-front-facing speaker in a multi-speaker system. For example, the multi-speaker system can include an array of forward-facing speakers, one or more upward-facing speakers, and/or one or more side-facing speakers. Filters coupled to any two of the speakers in the multi-speaker system can generate audio signals output by the coupled speakers to reduce, attenuate, or cancel a portion of an audio signal output by one or more non-front-facing speakers that acoustically propagates along a direct path from the respective non-front-facing speaker to a listening position in a listening area in front of the multi-speaker system.
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Citations
20 Claims
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1. A multi-speaker system for reducing undesired leakage energy, the multi-speaker system comprising:
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a non-front-facing speaker configured to be positioned away from a listening area; a plurality of front-facing speakers configured to be positioned facing the listening area; a processor configured to apply an input audio signal to the non-front-facing speaker, the non-front-facing speaker configured to transmit the input audio signal such that the input audio signal acoustically propagates along a direct path to the listening area; and a plurality of filters, wherein each filter in the plurality of filters corresponds to a front-facing speaker in the plurality of front-facing speakers, and wherein each filter in the plurality of filters is configured to; generate an attenuating signal, and apply the attenuating signal to a corresponding front-facing speaker, wherein the plurality of attenuating signals collectively attenuate the input audio signal acoustically propagated by the non-front-facing speaker along the direct path to the listening area. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for canceling undesired leakage energy from a non-front-facing speaker to a listening area in front of a multi-speaker system comprising a plurality of first speakers and the non-front-facing speaker, the method comprising:
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applying an input audio signal to the non-front-facing speaker, the non-front-facing speaker configured to transmit the input audio signal such that the input audio signal acoustically propagates; along an indirect path that includes a reflection off a surface toward the listening area, and along a direct path to a listening position in the listening area, so that without further processing, a listener at the listening position would perceive the input audio signal acoustically propagated along the indirect path and along the direct path; generating a plurality of canceling signals directed toward the listening position in the listening area, each canceling signal of the plurality of canceling signals generated by a filter corresponding to a first speaker of the plurality of first speakers; and applying each canceling signal to the corresponding first speaker, the plurality of canceling signals collectively attenuating the input audio signal acoustically propagated by the non-front-facing speaker along the direct path to the listening position in the listening area, so that less of the input audio signal acoustically propagated along the direct path is perceivable at the listening position than would be heard without said applying. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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18. A method for reducing undesired leakage energy in a multi-speaker system, the method comprising:
by a hardware processor, supplying first audio signals to a plurality of first speakers configured to output audio toward a listening area; supplying second audio signals to a non-front-facing speaker configured to output the second audio signals such that the second audio signals acoustically propagate along a reflected path toward the listening area and along a direct path toward the listening area; generating a plurality of attenuating signals, each of the attenuating signals corresponding to one or more of the first speakers; and applying the plurality of attenuating signals to the first audio signals supplied to the first speakers so that the plurality of attenuating signals attenuate the second audio signals outputted by the non-front-facing speaker that acoustically propagate along the direct path. - View Dependent Claims (19, 20)
Specification