JPS5760515A - Synchronizing signal protection circuit - Google Patents
Synchronizing signal protection circuitInfo
- Publication number
- JPS5760515A JPS5760515A JP55132929A JP13292980A JPS5760515A JP S5760515 A JPS5760515 A JP S5760515A JP 55132929 A JP55132929 A JP 55132929A JP 13292980 A JP13292980 A JP 13292980A JP S5760515 A JPS5760515 A JP S5760515A
- Authority
- JP
- Japan
- Prior art keywords
- synchronizing signal
- synchronizing
- detected
- detection window
- width
- 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
- G11B20/10—Digital recording or reproducing
- G11B20/10527—Audio or video recording; Data buffering arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Optical Recording Or Reproduction (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
Abstract
PURPOSE:To reduce the synchronizing recovery time, by switching the width of synchronizing detection window depending if the synchronizing signal is detected, in a PCM disc player. CONSTITUTION:When a synchronizing signal is detected at a shift register 3 and a AND gate 3a, the width of synchronizing signal detection window formed with N', M' notation counters 20, 21 is set sufficiently to narrow value. If no synchronizing signal is detected, synchronizing signals can be compensated from the counter 21. At the same time an FF22 is reset, the frequency dividing ratio of the counters 20, 21 is respectively changed with this output, and the width of the synchronizing signal detection window is wider through the change in this frequency dividing ratio. As a result, the synchronizing signal is easily detected, and after the detection of the synchronizing signal, the detection window is again narrower to avoid malfunction due to noise. Thus, the synchronizing restoring time can be reduced.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55132929A JPS5760515A (en) | 1980-09-26 | 1980-09-26 | Synchronizing signal protection circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55132929A JPS5760515A (en) | 1980-09-26 | 1980-09-26 | Synchronizing signal protection circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5760515A true JPS5760515A (en) | 1982-04-12 |
Family
ID=15092792
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP55132929A Pending JPS5760515A (en) | 1980-09-26 | 1980-09-26 | Synchronizing signal protection circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5760515A (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59104731A (en) * | 1982-12-02 | 1984-06-16 | Sanyo Electric Co Ltd | Generating circuit of synchronizing circuit |
JPS6096033A (en) * | 1983-10-31 | 1985-05-29 | Sony Corp | System for detecting specific signal |
JPS60157773A (en) * | 1984-01-27 | 1985-08-19 | Ricoh Co Ltd | Synchronizing signal detector |
JPS61177679A (en) * | 1985-01-31 | 1986-08-09 | Canon Inc | Periodic signal detecting system |
JPS61287079A (en) * | 1985-06-13 | 1986-12-17 | Mitsubishi Electric Corp | Digital signal reproducing device |
EP0236017A2 (en) * | 1986-02-27 | 1987-09-09 | Sony Corporation | Synchronizing signal decoding |
JPH066336A (en) * | 1992-06-17 | 1994-01-14 | Yamaha Corp | Synchronizing signal correction method |
US7072364B2 (en) | 1998-10-20 | 2006-07-04 | Fujitsu Limited | Synchronization and setting system for signals received in radio base station |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6052505A (en) * | 1983-08-31 | 1985-03-25 | Nippon Steel Corp | Manufacture of chromium steel by refining using converter and vacuum decarburization refining furnace |
-
1980
- 1980-09-26 JP JP55132929A patent/JPS5760515A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6052505A (en) * | 1983-08-31 | 1985-03-25 | Nippon Steel Corp | Manufacture of chromium steel by refining using converter and vacuum decarburization refining furnace |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59104731A (en) * | 1982-12-02 | 1984-06-16 | Sanyo Electric Co Ltd | Generating circuit of synchronizing circuit |
JPS6096033A (en) * | 1983-10-31 | 1985-05-29 | Sony Corp | System for detecting specific signal |
JPS60157773A (en) * | 1984-01-27 | 1985-08-19 | Ricoh Co Ltd | Synchronizing signal detector |
JPS61177679A (en) * | 1985-01-31 | 1986-08-09 | Canon Inc | Periodic signal detecting system |
JPS61287079A (en) * | 1985-06-13 | 1986-12-17 | Mitsubishi Electric Corp | Digital signal reproducing device |
EP0236017A2 (en) * | 1986-02-27 | 1987-09-09 | Sony Corporation | Synchronizing signal decoding |
JPH066336A (en) * | 1992-06-17 | 1994-01-14 | Yamaha Corp | Synchronizing signal correction method |
US7072364B2 (en) | 1998-10-20 | 2006-07-04 | Fujitsu Limited | Synchronization and setting system for signals received in radio base station |
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