US5369710A
Expired / Lapsed
US
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Sound field correcting apparatus and method
Assignee: Pioneer Corp
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Filing: 1993-03-09
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Granted: 1994-11-29
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Expires: 2013-03-09
Abstract
Abstract Sound field correcting apparatus and method, in which at least two reflected sound generating circuits are cascade connected and output signals of the reflected sound generating circuits are added. A plurality of initial reflected sound signals for an original signal are first generated. Further many reflected sound signals are subsequently generated for the plurality of initial reflected sound signals. Those many reflected sound signals are obtained as reverberation sound portions.
Inventors
- 👤 Sampei Asai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:19
CPC Classifications
G; G10; G10K; G10K15/00; G10K15/08; G10K15/12; H; H03; H03G; H03G5/00; H03G5/16; H03G5/165; H04; H04R; H04R27/00; H04R3/00; H04R3/04; H04R2227/00; H04R2227/007; H04S; H04S7/00; H04S7/30; H04S7/305
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
117 words
A sound field correcting apparatus comprising: at least two reflected sound generated circuits each of which is constructed by a plurality of delay circuits which are cascade connected, a plurality of coefficient multipliers connected to respective outputs of said plurality of delay circuits, and an adder for adding output signals of said plurality of coefficient multipliers and for generating an added signal; connecting means for cascade connecting said reflected sound generating circuits such that the added signal generated by one of said reflected sound generating circuits serves as an input signal for a succeeding one of said reflected sound generating circuits in the cascade; and adding means for adding output signals of said reflected sound generating circuits.
Claim 2
Dependent Claim
117 words
A sound field correcting apparatus comprising: at least two reflected sound generated circuits each of which is constructed by a plurality of delay circuits which are cascade connected, a plurality of coefficient multipliers connected to respective outputs of said plurality of delay circuits, and an adder for adding output signals of said plurality of coefficient multipliers and for generating an added signal; connecting means for cascade connecting said reflected sound generating circuits such that the added signal generated by one of said reflected sound generating circuits serves as an input signal for a succeeding one of said reflected sound generating circuits in the cascade; and adding means for adding output signals of said reflected sound generating circuits.
Claim 3
Dependent Claim
35 words
An apparatus according to claim 1, wherein the reflected sound generating circuit at the post stage among at least said two reflected sound generating circuits includes a filter on the input side or output side.
Claim 4
Dependent Claim
19 words
An apparatus according to claim 2, wherein said filter is a band pass filter or a low pass filter.
Claim 5
Dependent Claim
118 words
A sound field correcting method comprising the steps of: generating a first plurality of initial reflected sound signals by using a plurality of delay circuits which are cascade connected to a first input terminal to which an input signal is supplied; adding said plurality of initial reflected sound signals to form a first added signal; generating a second plurality of reflected sound signals of said first plurality of initial reflected sound signals by using a plurality of delay circuits which are cascade connected to a second input terminal to which the first added signal is supplied; adding said second plurality of reflected sound signals to form a second added signal; and adding said first and second added signals.
Claim 6
Dependent Claim
118 words
A sound field correcting method comprising the steps of: generating a first plurality of initial reflected sound signals by using a plurality of delay circuits which are cascade connected to a first input terminal to which an input signal is supplied; adding said plurality of initial reflected sound signals to form a first added signal; generating a second plurality of reflected sound signals of said first plurality of initial reflected sound signals by using a plurality of delay circuits which are cascade connected to a second input terminal to which the first added signal is supplied; adding said second plurality of reflected sound signals to form a second added signal; and adding said first and second added signals.
Claim 7
Dependent Claim
35 words
A method according to claim 4, wherein said method further comprises the step of cutting off high frequency components of said first added signal before supplying said first added signal to said second input terminal.
Claim 8
Dependent Claim
35 words
A method according to claim 4, wherein said method further comprises the step of cutting off high frequency components of said second added signal before adding said second added signal to said first added signal.
References Cited (Backward Citations)
US4803731A
Cited
US5195140A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-11-28 | 1998-05-30 | 1998-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-11-28 | 2002-05-30 | 2002-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-11-28 | 2006-05-30 | 2006-11-29 | $7700.00 | Window Closed / Lapsed |