Loudspeaker array audio signal supply apparartus
AssigneeYamaha Corporation
InventorYusuke Konagai
Life of this patent
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Abstract
A first directivity parameter to provide a narrow directivity and a second directivity parameter to provide a wide directivity are preset for a directivity control apparatus to control the directivity of an array loudspeaker system. The directivity control apparatus selects either the first directivity parameter or the second directivity parameter in accordance with an instruction that is entered through an operating unit to select the directional characteristic of a loudspeaker array. Then, based on the selected directivity parameter, the directivity control apparatus generates delay control information, to be supplied to a delay circuit, and generates gain control information, to be supplied to a weighting unit.
Claims6
An audio signal supply apparatus for supplying an audio signal to a loudspeaker array constituted by a plurality of loudspeaker units, characterized by comprising:
- a delay unit that performs a delay process for each of audio signals to be supplied to the loudspeaker units in accordance with provided delay control information;
- a weighting unit that weights each of the audio signal to be supplied to the loudspeaker units in accordance with gain control information that is provided;
- a storage unit that stores a first directivity parameter which sets a directional characteristic for the loudspeaker as a narrow directivity, and a second directivity parameter which sets the directional characteristic for the loudspeaker as a wide directivity;
- an input unit that receives a selection instruction for the directional characteristic;
- and
- a directivity control unit that selects one of the directivity parameters in accordance with the input selection instruction, generates the delay control information and the gain control information based on the selected directivity parameter, and supplies the delay control information and the gain control information to the delay unit and the weighting unit, respectively.
The audio signal supply apparatus, which supplies an audio signal to a loudspeaker array constituted by a plurality of loudspeaker units, characterized by comprising:
- a branching unit that branches an input audio signal into two or more signals;
- a first processing unit that performs a delay process and/or a weighting process for of the signal that is obtained by branching one audio signal and is to be supplied to the loudspeaker units in accordance with first provided directivity control information;
- a second processing unit that performs a delay process and/or a weighting process for other signal that is obtained by branching one audio signal and that is to be supplied to the loudspeaker units in accordance with second directivity control information that is provided;
- a directivity control unit that generates the first directivity control information and the second directivity control information so that a directional characteristic of the loudspeaker array obtained by the first process differs from a directional characteristic of the loudspeaker array obtained by the second process, and supplying the generated information respectively to the first processing unit and the second processing unit;
- and
- an adding unit that adds the audio signal processed by the first processing unit to the audio signal processed by the second processing unit.
Dependencies are inferred from the claim text.