US 8,139,774 B2 · Multi-element directional acoustic arrays

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.

Claims20

Dependent claims

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.

3 more elements

Dependencies are inferred from the claim text.

Multi-element directional acoustic arrays

Life of this patent

Multi-element directional acoustic arrays

Life of this patent

Abstract

Claims20