EP0276948A2
Expired / Lapsed
EP
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Sound field control device
Assignee: Yamaha Corp
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Filing: 1988-01-20
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Granted: —
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Expires: 2008-01-20
Abstract
Abstract A sound field control device is capable of producing a sound field effect tone which has a tonal effect providing a listener with a feeling of presence and comprises a sound field effect tone generation circuit (36) for generating a sound field effect tone on the basis of sound field information supplied from a source and a source signal. The sound field effect tone is sounded simultaneously with reproduction of the source signal and a reproduced sound field produced on the basis of the source signal is controlled by this sound field effect tone. In one aspect of the invention, the sound field effect tone generation circuit comprises a convolution operation circuit (39) which subjects a signal derived from left and right signals from the source signal to convolution operation with sound field data derived on the basis of the sound field information from the source signal.
Inventors
- 👤 Masayuki Iwamatsu
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 12:59
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/06; H04B1/16; H04B1/20; H04S; H04S7/00; H04S7/30; H04S7/305; Y; Y10; Y10S; Y10S84/00; Y10S84/01; Y10S84/26
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
63 words
A sound field control device comprising sound field effect tone generation means for generating a sound field effect tone on the basis of sound field information supplied from a source and a source signal, the sound field effect tone being sounded simultaneously with reproduction of the source signal whereby a reproduced sound field produced on the basis of the source signal is controlled.
Claim 2
Dependent Claim
63 words
A sound field control device comprising sound field effect tone generation means for generating a sound field effect tone on the basis of sound field information supplied from a source and a source signal, the sound field effect tone being sounded simultaneously with reproduction of the source signal whereby a reproduced sound field produced on the basis of the source signal is controlled.
Claim 3
Dependent Claim
54 words
A sound field control device as defined in claim 1 wherein said sound field effect tone generation means comprises convolution operation means for subjecting a signal derived from left and right signals from the source signal to convolution operation with sound field data based on the sound field information derived from the source signal.
Claim 4
Dependent Claim
74 words
A sound field control device as defined in claim 2 wherein the sound field information derived from the source is data for selecting one of plural sound field programs whose sound field data are preset in a memory and sound field data of the selected sound field program is read out from said memory and is subjected to convolution operation with the signal derived from the left and right signal from the source signal.
Claim 5
Dependent Claim
74 words
A sound field control device as defined in claim 3 wherein the sound field information derived from the source signal further comprises parameter changing data for changing parameters of the selected sound field program and the sound field data read out from said memory is changed in accordance with this parameter changing data and thereaftrer is subjected to convolution operation with the signal derived from the left and right signals from the source signal.
Claim 6
Dependent Claim
24 words
A sound field control device as defined in claim 4 wherein the changed sound field data is stored in a memory for reutilization thereof.
Claim 7
Dependent Claim
47 words
A sound field control device as defined in claim 2 wherein the sound field information derived from the source signal is the sound field data itself and is directly subjected to convolution operation with the signal derived from the left and right signals from the source signal.
Claim 8
Dependent Claim
92 words
A sound field control device as defined in claim 2 wherein the sound field data comprises data for four channels corresponding to positions which are front left, front right, rear left and rear right of a listening position in a room and these data are subjected to convolution operation with the signal derived from the left and right signals of the source signal whereby four sound field effect tones are obtained and sounded from loudspeakers provided at the front left, front right, rear left and rear right positions of the listening position.
Claim 9
Dependent Claim
23 words
A sound field control device as defined in claim 2 wherein the sound field information is obtained for each reproduced piece of music.
Claim 10
Dependent Claim
25 words
A sound field control device as defined in claim 2 wherein the sound field information is obtained for each scene of reproduced piece of music.
Claim 11
Dependent Claim
38 words
A sound field control device as defined in claim 2 wherein the signal derived from the left and right signals from the source signal is a sum signal or a difference signal of the left and right signals.
References Cited (Backward Citations)
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