Audio playback method and apparatus using line array speaker unit
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H04R-005/00
H04R-025/00
H04R-009/06
H04B-003/00
출원번호
US-0348555
(2006-02-06)
등록번호
US-8345883
(2013-01-01)
우선권정보
JP-2003-290686 (2003-08-08)
발명자
/ 주소
Takumai, Susumu
Usui, Akira
출원인 / 주소
Yamaha Corporation
대리인 / 주소
Rossi, Kimms & McDowell LLP
인용정보
피인용 횟수 :
14인용 특허 :
18
초록▼
A multi-channel audio system is constituted using at least one line array speaker unit, in which plural speakers are arrayed in line, wherein the same audio signal is supplied with a prescribed delay time to each of the speakers, thus forming plural sound beams. The plural sound beams are reflected
A multi-channel audio system is constituted using at least one line array speaker unit, in which plural speakers are arrayed in line, wherein the same audio signal is supplied with a prescribed delay time to each of the speakers, thus forming plural sound beams. The plural sound beams are reflected on a wall surface and a ceiling of a room so as to form plural virtual sound sources surrounding a listening position, and emission directions and intensities of the sound beams are controlled so as to localize a phantom at a prescribed position based on the plural virtual sound sources. By appropriately arranging plural line array speaker units horizontally, vertically, and slantingly in such a way that each line array speaker unit forms sound beams distributed and spread in a sectorial form, it is possible to realize a surround audio system having a high degree of freedom with regard to setup positions for forming virtual sound sources.
대표청구항▼
1. An audio playback apparatus comprising: at least one line array speaker unit having a plurality of speakers arrayed in line;an input device that inputs an audio signal;a beam control device that: receives at least a first audio signal of a single source or channel among the audio signal input by
1. An audio playback apparatus comprising: at least one line array speaker unit having a plurality of speakers arrayed in line;an input device that inputs an audio signal;a beam control device that: receives at least a first audio signal of a single source or channel among the audio signal input by the input device; andbased on the first audio signal, produces and supplies a plurality of first audio signals, each with a prescribed delay time, to each of the plurality of speakers to produce a plurality of sound beams directed to a plurality of different prescribed locations along a plurality of walls to reflect the plurality of sound beams off the different prescribed wall locations of the plurality of walls to form a plurality of virtual sound sources located at the different prescribed wall locations along the plurality of walls; anda localization control device that controls the beam control device to change emission directions and intensities of the respective sound beams to localize a phantom, which is located between the virtual sound sources. 2. An audio playback apparatus according to claim 1, wherein a plurality of line array speaker units are arranged horizontally with respect to a listening position. 3. An audio playback apparatus according to claim 1, a plurality of line array speaker units are arranged vertically with respect to a listening position. 4. An audio playback apparatus according to claim 1, wherein a plurality of line array speaker units are arranged slantingly with respect to a listening position. 5. An audio playback apparatus according to claim 1, wherein the sound beams emitted from the line array speaker unit are distributed and spread in a sectorial form towards a listening position. 6. A method of controlling an audio playback apparatus having at least one line array speaker unit having a plurality of speakers arrayed in line, an input device, a beam control device, and a localization control device, the method comprising the steps of: inputting through the input device an audio signal;receiving at least a first audio signal of a single source or channel among the audio signal input by the input device with the beam control device;based on the first audio signal, producing and supplying, with the beam control device, a plurality of first audio signals, each with a prescribed delay time, to each of the plurality of speakers to produce a plurality of sound beams;directing the plurality of sound beams to a plurality of different prescribed locations along a plurality of walls to reflect the plurality of sound beams off the different prescribed wall locations of the plurality of walls to form a plurality of virtual sound sources located at the different prescribed wall locations along the plurality of walls; andcontrolling the beam control device, with the localization control device, to change emission directions and intensities of the respective sound beams to localize a phantom, which is located between the virtual sound sources. 7. An audio playback method according to claim 6, wherein the sound beams emitted from the line array speaker unit are distributed and spread in a sectorial form towards a listening position. 8. An audio playback apparatus according to claim 1, further comprising: at least three line speaker units each having a plurality of speakers arrayed in line;a video display having a rectangular shape; anda display housing each of the line speaker units to border on one of three sides of the video display. 9. A speaker system comprising: at least one array speaker unit having a plurality of speakers arrayed in line;an input device that inputs an audio signal;a beam control device that: receives at least a first audio signal of a single source or channel among the audio signal input by the input device; andbased on the first audio signal, produces and supplies a plurality of first audio signals, each with a prescribed delay time, to each of the plurality of speakers to produce a plurality of sound beams directed to a plurality of different prescribed locations along the plurality of walls to reflect the plurality of sound beams off the different prescribed wall locations of the plurality of walls to form a plurality of virtual sound sources located at the different prescribed wall locations along the plurality of walls; anda localization control device that controls the beam control device to change emission directions and intensities of the respective sound beams to localize a phantom, which is located between the virtual sound sources. 10. A speaker system according to claim 9, wherein a combination of a plurality of speaker units is used to change directivity. 11. A speaker system according to claim 9, wherein a plurality of speaker units are arrayed in a prescribed direction alternately in vertical position with respect to the prescribed direction. 12. An audio playback apparatus according to claim 2, wherein the sound beams emitted from the line array speaker unit are distributed and spread in a sectorial form towards a listening position. 13. An audio playback apparatus according to claim 3, wherein the sound beams emitted from the line array speaker unit are distributed and spread in a sectorial form towards a listening position. 14. An audio playback apparatus according to claim 4, wherein the sound beams emitted from the line array speaker unit are distributed and spread in a sectorial form towards a listening position. 15. An audio playback apparatus according to claim 1, further comprising: a decoder,wherein the input audio signal is a multi-channel signalwherein the decoder divides the multi-channel signal into a plurality of channel signals, andwherein the first audio signal is one of the plurality of channel signals. 16. An audio playback method according to claim 6, wherein the audio playback apparatus further comprises: a decoder,wherein the input audio signal is a multi-channel signal,wherein the decoder divides the multi-channel signal into a plurality of channel signals, andwherein the first audio signal is one of the plurality of channel signals. 17. A speaker system according to claim 9, further comprising: a decoder,wherein the input audio signal is a multi-channel signal,wherein the decoder divides the multi-channel signal into a plurality of channel signals, andwherein the first audio signal is one of the plurality of channel signals.
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