Multi-speaker method and apparatus for leakage cancellation
First Claim
1. A multi-speaker system comprising:
- a plurality of first speakers;
a second speaker;
a processor configured to apply, to individual speakers in the plurality of first speakers, input audio signals, the plurality of first speakers configured to output the input audio signals such that the input audio signals acoustically propagate to a listening area via a plurality of direct paths and via a plurality of indirect paths; and
a plurality of filters corresponding to the second speaker, wherein each filter in the plurality of filters is configured to generate a second signal, wherein the plurality of filters are configured to provide the second signals to the second speaker,wherein the second signals applied to the second speaker by the plurality of filters collectively at least attenuate the input audio signals acoustically propagated by the plurality of first speakers to the listening area via the plurality of direct paths to increase audibility of the input audio signals acoustically propagated to the listening area via the plurality of indirect path.
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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
21 Claims
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1. A multi-speaker system comprising:
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a plurality of first speakers; a second speaker; a processor configured to apply, to individual speakers in the plurality of first speakers, input audio signals, the plurality of first speakers configured to output the input audio signals such that the input audio signals acoustically propagate to a listening area via a plurality of direct paths and via a plurality of indirect paths; and a plurality of filters corresponding to the second speaker, wherein each filter in the plurality of filters is configured to generate a second signal, wherein the plurality of filters are configured to provide the second signals to the second speaker, wherein the second signals applied to the second speaker by the plurality of filters collectively at least attenuate the input audio signals acoustically propagated by the plurality of first speakers to the listening area via the plurality of direct paths to increase audibility of the input audio signals acoustically propagated to the listening area via the plurality of indirect path. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for attenuating undesired leakage energy from a plurality of first speakers to a listening area in front of a speaker system comprising the plurality of first speakers and a second speaker, the method comprising:
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applying, to individual speakers in the plurality of first speakers, input audio signals, the plurality of first speakers configured to output the input audio signals such that the input audio signals acoustically propagate toward the listening area via a plurality of direct paths and via a plurality of indirect paths; generating a plurality of second signals; and outputting, by the second speaker, the plurality of second signals, the plurality of second signals collectively at least attenuating the input audio signals acoustically propagated by the plurality of first speakers via the plurality of direct paths such that the input audio signals acoustically propagated via the plurality of indirect paths are more audible than the input audio signals acoustically propagated via the plurality of direct paths. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A method comprising:
by a hardware processor, supplying a first audio signal to a first speaker so that the first speaker outputs the first audio signal toward a listening area; supplying second audio signals to a plurality of second speakers so that the plurality of second speakers output the second audio signals toward the listening area via a plurality of direct paths and via a plurality of indirect paths; generating a plurality of second signals; and causing the first speaker to output the plurality of second signals so that the plurality of second signals at least attenuate the second audio signals outputted by the plurality of second speakers via the plurality of direct paths such that the input audio signals acoustically propagated via the plurality of direct paths are less audible than the input audio signals acoustically propagated via the plurality of indirect paths. - View Dependent Claims (17, 18, 19, 20, 21)
Specification