Multi-element directional acoustic arrays
First Claim
1. An audio system, comprising:
- a left input channel audio signal, a right input channel audio signal, and a discrete center input channel audio signal;
circuitry for removing correlated content from the left input channel audio signal and the right input channel audio signal and inserting the correlated content into the center channel signal, to provide a modified left input channel audio signal, a modified right input channel audio signal, and a modified center input channel audio signal;
a first directional loudspeaker, for directionally radiating the modified left audio channel signal so that radiation in a direction toward a listening location is less than radiation in other directions;
a second directional loudspeaker, for directionally radiating the modified right channel audio signal so that radiation in a direction toward a listening location is less than radiation in other directions; and
a third loudspeaker, for radiating the modified center channel.
1 Assignment
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Accused Products
Abstract
An audio system including a left input channel signal, a right input channel signal, and a discrete center input channel. Circuitry removes correlated content from the left input channel signal and the right input channel signal and inserts the correlated content into the center input channel signal to provide a modified left input channel signal, a modified right input channel signal, and a modified center input channel signal. The modified left input channel signal is radiated by a directional loudspeaker so that radiation in a direction toward a listening area is less than radiation in other directions. The modified right channel input channel signal is radiated by a directional loudspeaker so that radiation in a direction toward a listening area is less than radiation in other directions.
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Citations
20 Claims
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1. An audio system, comprising:
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a left input channel audio signal, a right input channel audio signal, and a discrete center input channel audio signal; circuitry for removing correlated content from the left input channel audio signal and the right input channel audio signal and inserting the correlated content into the center channel signal, to provide a modified left input channel audio signal, a modified right input channel audio signal, and a modified center input channel audio signal; a first directional loudspeaker, for directionally radiating the modified left audio channel signal so that radiation in a direction toward a listening location is less than radiation in other directions; a second directional loudspeaker, for directionally radiating the modified right channel audio signal so that radiation in a direction toward a listening location is less than radiation in other directions; and a third loudspeaker, for radiating the modified center channel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method comprising
receiving a left channel audio signal, a right channel audio signal, and a discrete center channel audio signal; -
removing correlated content from the left channel audio signal and the right channel audio signal to provide a modified left channel audio signal and a modified right channel audio signal; combining the correlated content with the discrete center channel audio signal; radiating the modified left channel audio signal and the modified right audio channel audio signal directionally so that the radiation toward a listening position is less than the radiation in other directions. - View Dependent Claims (15, 16)
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17. Audio signal circuitry comprising:
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circuitry to remove correlated content from a left channel audio signal and a right channel audio signal to provide a modified left channel audio signal and a modified right channel audio signal; circuitry to combine the correlated content with a discrete center channel audio signal to provide a modified discrete center channel; and first processing circuitry to process the modified left channel audio signal so that the modified left channel audio signal is directionally radiatable by a first interference array; and second processing circuitry to process the modified right channel audio signal so that the modified right channel audio signal is directionally radiatable by a second interference array. - View Dependent Claims (18, 19, 20)
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Specification