JPS5577043A - Sound signal reproducing circuit - Google Patents
Sound signal reproducing circuitInfo
- Publication number
- JPS5577043A JPS5577043A JP14984278A JP14984278A JPS5577043A JP S5577043 A JPS5577043 A JP S5577043A JP 14984278 A JP14984278 A JP 14984278A JP 14984278 A JP14984278 A JP 14984278A JP S5577043 A JPS5577043 A JP S5577043A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- sound
- signals
- drop
- noise
- 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
Landscapes
- Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
Abstract
PURPOSE: To output sound reproducing signals without influence of noise at a drop- out generation time by switching the path and the characteristic of a noise reduction circuit according to the level of sound signals reproduced together with video information.
CONSTITUTION: When drop-out of video reproducing signals from disc 11 is detected by video signal filter circuit 13 and drop-out detection circuit 14, the output of circuit 14 is inverted to a high level and is applied to sound cancel circuit 17 and signal compressing Dolby processing circuit 18 which form a noise reduction circuit. Then, circuit 18 cancels sound reproducing signals through circuit 17 in case of a low sound reproducing signal level of disc 11 passing through sound signal filter circuit 15 and compresses and outputs noise signals accompanied with drop-out, which have a level lower than sound signals, together with sound signals only in case of a high sound signal level, thereby obtaining a reproducing output without influence of noise at a drop-out generation time.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14984278A JPS5577043A (en) | 1978-12-04 | 1978-12-04 | Sound signal reproducing circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14984278A JPS5577043A (en) | 1978-12-04 | 1978-12-04 | Sound signal reproducing circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5577043A true JPS5577043A (en) | 1980-06-10 |
Family
ID=15483840
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14984278A Pending JPS5577043A (en) | 1978-12-04 | 1978-12-04 | Sound signal reproducing circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5577043A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59195303A (en) * | 1983-04-20 | 1984-11-06 | Matsushita Electric Ind Co Ltd | Abnormal signal detector |
-
1978
- 1978-12-04 JP JP14984278A patent/JPS5577043A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59195303A (en) * | 1983-04-20 | 1984-11-06 | Matsushita Electric Ind Co Ltd | Abnormal signal detector |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS5746306A (en) | Aural signal muting circuit of magnetic recorder and reproducer | |
JPS5412714A (en) | Recorder-reproducer | |
JPS53129079A (en) | Spectrum change monitoring system | |
JPS57184381A (en) | Video signal processor | |
JPS5753823A (en) | Tracking control system | |
JPS5577043A (en) | Sound signal reproducing circuit | |
JPS57211885A (en) | Noise reduction circuit | |
JPS57172511A (en) | Time-axis compressing and expanding circuit | |
JPS51145256A (en) | Signal detecting circuit | |
KR920017070A (en) | High Frequency Adaptive De-emphasis and Re-emphasis in Video Signals Using Recorded Control Signals | |
JPS5580810A (en) | Magnetic recorder/reproducer | |
JPS542702A (en) | Drop-out corrector | |
ES475021A1 (en) | Record noise suppression system | |
JPS5675730A (en) | Information recording and reproducing system | |
JPS5580861A (en) | Information recording carrier | |
JPS54109403A (en) | Locked group detector | |
JPS5766573A (en) | Detecting circuit for reference signal for tracking control | |
JPS5256502A (en) | Tracing distorsion compensating device for disc record | |
JPS57150288A (en) | Drop-out detecting device | |
JPS53116106A (en) | Removal method of interference distortion produced in demodulated signals by inteference of fm wave signals to themselves in recording and reproducing system of mu-tichannel disc records | |
JPS5377511A (en) | Recorder/reproducer | |
JPS5331117A (en) | Magnetic reproducer | |
JPS5222824A (en) | Picture signal recording method | |
JPS5310220A (en) | Noise rejecting circuit in optical information reproducing unit | |
JPS57129074A (en) | Video disk player |