Local sound field forming apparatus and local sound field forming method
AssigneeSony Corporation
InventorsYu Maeno, Yuhki Mitsufuji
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Abstract
There is provided a local sound field forming apparatus including a local sound field forming filter coefficient recording unit that records an audio filter coefficient for forming a sound field by an evanescent wave, a filter unit that convolves the audio filter coefficient and a sound source signal to generate a loudspeaker drive signal, and a loudspeaker array that includes a plurality of loudspeakers including a directional loudspeaker, and that reproduces a sound on the basis of the loudspeaker drive signal. The present technology can be applied to a local sound field forming apparatus.
Claims6
A local sound field forming apparatus, comprising:
- a local sound field forming filter coefficient recording unit configured to record an audio filter coefficient;
- a filter unit configured to:
- convolve the audio filter coefficient and a sound source signal;
- and
- generate a loudspeaker drive signal based on a result of the convolution;
- and
- a loudspeaker array including a plurality of loudspeakers, wherein
- the plurality of loudspeakers is a combination of a plurality of omnidirectional loudspeakers and a plurality of directional loudspeakers,
- the plurality of omnidirectional loudspeakers and the plurality of directional loudspeakers are alternately arranged in the loudspeaker array, and
- the loudspeaker array is configured to reproduce a sound based on the loudspeaker drive signal.
A local sound field forming method, comprising:
- in a local sound field forming apparatus:
- recording, by a local sound field forming filter coefficient recording unit of the local sound field forming apparatus, an audio filter coefficient;
- convolving, by a filter unit of the local sound field forming apparatus, the audio filter coefficient and a sound source signal;
- generating, by the filter unit, a loudspeaker drive signal based on a result of the convolution;
- and
- reproducing, by a loudspeaker array of the local sound field forming apparatus, a sound based on the loudspeaker drive signal, wherein
- the loudspeaker array includes a plurality of loudspeakers,
- the plurality of loudspeakers is a combination of a plurality of omnidirectional loudspeakers and a plurality of directional loudspeakers, and
- the plurality of omnidirectional loudspeakers and the plurality of directional loudspeakers are alternately arranged in the loudspeaker array.
A non-transitory computer-readable medium having stored thereon, computer-executable instructions which, when executed by a computer, cause the computer to execute operations to control a local sound field forming apparatus, the operations comprising:
- recording an audio filter coefficient;
- convolving the audio filter coefficient and a sound source signal;
- generating a loudspeaker drive signal based on a result of the convolution;
- and
- reproducing, by a loudspeaker array of the local sound field forming apparatus, a sound based on the loudspeaker drive signal, wherein
- the loudspeaker array includes a plurality of loudspeakers,
- the plurality of loudspeakers is a combination of a plurality of omnidirectional loudspeakers and a plurality of directional loudspeakers, and
- the plurality of omnidirectional loudspeakers and the plurality of directional loudspeakers are alternately arranged in the loudspeaker array.
Dependencies are inferred from the claim text.