JPS5740713A - Audio signal reproducing device equipped with noise eliminating circuit - Google Patents
Audio signal reproducing device equipped with noise eliminating circuitInfo
- Publication number
- JPS5740713A JPS5740713A JP55115963A JP11596380A JPS5740713A JP S5740713 A JPS5740713 A JP S5740713A JP 55115963 A JP55115963 A JP 55115963A JP 11596380 A JP11596380 A JP 11596380A JP S5740713 A JPS5740713 A JP S5740713A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- previous
- value holding
- signal
- period
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/24—Signal processing not specific to the method of recording or reproducing; Circuits therefor for reducing noise
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
- Television Signal Processing For Recording (AREA)
Abstract
PURPOSE:To reduce noises by shortening a previous-value holding time, by changing a switching circuit over to a side where neither an LPF nor a previous-value holding circuit resides in a period except when the previous value of a dropout period including a transient period due to the LPF is held. CONSTITUTION:An audio FM signal passed through a BPF2 is detected by a dropout detecting circuit 7 and at the ending of the dropout detection signal, a monostable multivibrator 16 is triggered, thereby outputting a pulse with pulse width equivalent to the transient periof of a signal delay circuit 14. Then, a previous-value holding circuit 6 is put in operation by operating an OR circuit 9, and a switching circuit 15 is changed over to a circuit 6 side. Consequently, the switching circuit is connected to the side of the previous-value holding dircuit 6 where an LPF6 is connected only during the dropout period of the audio FM signal and the short transient period of the output of the circuit 14 due to the BPF2, so a previous-value holding time is shortened to reduce noises of the audio FM signal due to dropouts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55115963A JPS5740713A (en) | 1980-08-25 | 1980-08-25 | Audio signal reproducing device equipped with noise eliminating circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55115963A JPS5740713A (en) | 1980-08-25 | 1980-08-25 | Audio signal reproducing device equipped with noise eliminating circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5740713A true JPS5740713A (en) | 1982-03-06 |
Family
ID=14675464
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP55115963A Pending JPS5740713A (en) | 1980-08-25 | 1980-08-25 | Audio signal reproducing device equipped with noise eliminating circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5740713A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS609061U (en) * | 1983-06-24 | 1985-01-22 | ミツミ電機株式会社 | Video tape recorder playback audio signal processing circuit |
| JPH03246740A (en) * | 1990-02-26 | 1991-11-05 | Oki Electric Ind Co Ltd | Communication bus managing system in network |
| JPH042364U (en) * | 1990-04-23 | 1992-01-09 | ||
| JPH05171659A (en) * | 1992-04-17 | 1993-07-09 | Ikehatagumi:Kk | Execution assisting system and execution control system of dredger |
| JP2005184041A (en) * | 2003-12-15 | 2005-07-07 | Sony Corp | Apparatus and system for reproducing audio signal |
-
1980
- 1980-08-25 JP JP55115963A patent/JPS5740713A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS609061U (en) * | 1983-06-24 | 1985-01-22 | ミツミ電機株式会社 | Video tape recorder playback audio signal processing circuit |
| JPH03246740A (en) * | 1990-02-26 | 1991-11-05 | Oki Electric Ind Co Ltd | Communication bus managing system in network |
| JPH042364U (en) * | 1990-04-23 | 1992-01-09 | ||
| JPH05171659A (en) * | 1992-04-17 | 1993-07-09 | Ikehatagumi:Kk | Execution assisting system and execution control system of dredger |
| JP2005184041A (en) * | 2003-12-15 | 2005-07-07 | Sony Corp | Apparatus and system for reproducing audio signal |
| JP4617668B2 (en) * | 2003-12-15 | 2011-01-26 | ソニー株式会社 | Audio signal processing apparatus and audio signal reproduction system |
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