JPS6489900A - Sound signal attenuation device - Google Patents
Sound signal attenuation deviceInfo
- Publication number
- JPS6489900A JPS6489900A JP62246442A JP24644287A JPS6489900A JP S6489900 A JPS6489900 A JP S6489900A JP 62246442 A JP62246442 A JP 62246442A JP 24644287 A JP24644287 A JP 24644287A JP S6489900 A JPS6489900 A JP S6489900A
- Authority
- JP
- Japan
- Prior art keywords
- sound signal
- signal
- existence
- delay
- switching
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
PURPOSE:To enable a sound signal to be stably attenuated by automatically detecting the existence of a sound signal in a stereo signal and switching the control response characteristic of delay time at a part where the sound signal exists or a part where the sound signal does not exist. CONSTITUTION:A sound signal existence detection means 13 detecting the existence of the sound signal of a two channel signal, a phase detection control means 7 detecting the phase aberration of the two channel signal and controlling the delay time of a second delay means 4 and a time constant switching means 12 switching time constant based on the output information of the control means 7 when the delay time of the second delay means 4 is changed are provided. By providing a subtraction means 8 arithmetic-operating the difference of the output signal between a first and the second delay means, the time constant of the switching means 12 is switched according to the existence of the sound signal in the inputted two channel signal. Thus a sound signal attenuation device with high efficiency which can stably attenuate the sound signal can be obtained.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62246442A JP2629739B2 (en) | 1987-09-30 | 1987-09-30 | Audio signal attenuator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62246442A JP2629739B2 (en) | 1987-09-30 | 1987-09-30 | Audio signal attenuator |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6489900A true JPS6489900A (en) | 1989-04-05 |
JP2629739B2 JP2629739B2 (en) | 1997-07-16 |
Family
ID=17148515
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62246442A Expired - Fee Related JP2629739B2 (en) | 1987-09-30 | 1987-09-30 | Audio signal attenuator |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2629739B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7894609B2 (en) | 2002-07-10 | 2011-02-22 | Trident Microsystems (Far East) Ltd. | Stereo signal processing apparatus |
-
1987
- 1987-09-30 JP JP62246442A patent/JP2629739B2/en not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7894609B2 (en) | 2002-07-10 | 2011-02-22 | Trident Microsystems (Far East) Ltd. | Stereo signal processing apparatus |
Also Published As
Publication number | Publication date |
---|---|
JP2629739B2 (en) | 1997-07-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |