Title:
音場を作り出す方法および装置
Document Type and Number:
Japanese Patent JP4445705
Kind Code:
B2
Abstract:
The invention generally relates to a method and apparatus for taking an input signal, replicating it a number of times and modifying each of the replicas before routing them to respective output transducers such that a desired sound field is created. This sound field may comprise a directed beam, focused beam or a simulated origin. In a first aspect, delays are added to sound channels to remove the effects of different travelling distances. In a second aspect, a delay is added to a video signal to account for the delays added to the sound channels. In a third aspect, different window functions are applied to each channel to give improved flexibility of use. In a fourth aspect, a smaller extent of transducers is used top output high frequencies than are used to output low frequencies. An array having a larger density of transducers near the center is also provided. In a fifth aspect, a line of elongate transducers is provided to give good directivity in a plane. In a sixth aspect, sound beams are focused in front or behind surfaces to give different beam widths and simulated origins. In a seventh aspect, a camera is used to indicate where sound is directed.
Inventors:
Trofton, Paul, Thomas
Fully, Anthony
Gourdy, Angus, Gavin
Easton, Mark, George
Benek, Irving, Alexander
Davies, James
Ryan, Damon, Thomas
Windle, Paul, Raymond
Fully, Anthony
Gourdy, Angus, Gavin
Easton, Mark, George
Benek, Irving, Alexander
Davies, James
Ryan, Damon, Thomas
Windle, Paul, Raymond
Application Number:
JP2002576475A
Publication Date:
April 07, 2010
Filing Date:
March 27, 2002
Export Citation:
Assignee:
1...Limited
International Classes:
H04N5/232; G10K15/04; H04S7/00; H04R1/40; H04R3/12; H04S3/00; H04R1/26; H04S1/00
Domestic Patent References:
| JP6205496A | ||||
| JP9233591A | ||||
| JP4132499A | ||||
| JP4127700A | ||||
| JP213097A | ||||
| JP8181962A | ||||
| JP6178379A | ||||
| JP2000505627A |
Foreign References:
| WO2001023104A1 |
Attorney, Agent or Firm:
Hideto Asamura
Hajime Asamura
Kuniaki Shimizu
Hayashi Zouzo
Hajime Asamura
Kuniaki Shimizu
Hayashi Zouzo