JPS5567921A - Synchronizing signal regenerating circuit - Google Patents
Synchronizing signal regenerating circuitInfo
- Publication number
- JPS5567921A JPS5567921A JP14200478A JP14200478A JPS5567921A JP S5567921 A JPS5567921 A JP S5567921A JP 14200478 A JP14200478 A JP 14200478A JP 14200478 A JP14200478 A JP 14200478A JP S5567921 A JPS5567921 A JP S5567921A
- Authority
- JP
- Japan
- Prior art keywords
- counters
- nand gate
- synchronizing signal
- pulse
- string
- 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
Landscapes
- Error Detection And Correction (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
Abstract
PURPOSE: To prevent malfunction due to generation of several error synchronizing signals by using counters and NAND gate.
CONSTITUTION: Synchronous extraction circuit 15 is connected to counters 11 and 12 equipped with preset teminals 16 and 16' through NAND gate 13 and inverter 14. then counters 11 and 12 are preset to value (a) a little bit smaller than a synchronous pattern generating period. Consequently, counters 11 and 12, when counting regenerated clock signals E to number (a), generate carry pulse H2 to put one gate of NAND gate 13 in an ON state and pulse (l), generated when there is a string of pulses agreeing with a (m)-bit synchronous pattern in a string of regenerated pulses, is inputted from synchronizing signal extraction circuit 15 to the other gate of NAND gate 13. Consequently, pulse K appears at the output of NAND gate 13 and counters 11 and 12 are initialized, generating no carry pulse H2. Therefore, malfunction is prevented even if a pattern equivalent to the string of synchronizing signal pulses resides in sound or music information.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14200478A JPS5567921A (en) | 1978-11-16 | 1978-11-16 | Synchronizing signal regenerating circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14200478A JPS5567921A (en) | 1978-11-16 | 1978-11-16 | Synchronizing signal regenerating circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5567921A true JPS5567921A (en) | 1980-05-22 |
JPS6136306B2 JPS6136306B2 (en) | 1986-08-18 |
Family
ID=15305136
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14200478A Granted JPS5567921A (en) | 1978-11-16 | 1978-11-16 | Synchronizing signal regenerating circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5567921A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5898813A (en) * | 1981-12-08 | 1983-06-11 | Sony Corp | Reproducing device for digital signal |
JPS58119245A (en) * | 1982-01-11 | 1983-07-15 | Hitachi Ltd | Word synchronizing pattern reproducing system |
JPS58169313A (en) * | 1982-03-31 | 1983-10-05 | Nec Home Electronics Ltd | Synchronization protecting circuit |
JPS59104731A (en) * | 1982-12-02 | 1984-06-16 | Sanyo Electric Co Ltd | Generating circuit of synchronizing circuit |
JPS6039948A (en) * | 1983-08-15 | 1985-03-02 | Seiko Epson Corp | Timing signal extracting circuit |
JPS6070556A (en) * | 1983-09-28 | 1985-04-22 | Canon Inc | Information recording and reproducing device |
JPS6096033A (en) * | 1983-10-31 | 1985-05-29 | Sony Corp | System for detecting specific signal |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5183315U (en) * | 1974-12-26 | 1976-07-03 | ||
JPS52102613A (en) * | 1976-02-25 | 1977-08-29 | Hitachi Ltd | Frame synchronization signal detector circuit |
-
1978
- 1978-11-16 JP JP14200478A patent/JPS5567921A/en active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5183315U (en) * | 1974-12-26 | 1976-07-03 | ||
JPS52102613A (en) * | 1976-02-25 | 1977-08-29 | Hitachi Ltd | Frame synchronization signal detector circuit |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5898813A (en) * | 1981-12-08 | 1983-06-11 | Sony Corp | Reproducing device for digital signal |
JPH054749B2 (en) * | 1981-12-08 | 1993-01-20 | Sony Corp | |
JPS58119245A (en) * | 1982-01-11 | 1983-07-15 | Hitachi Ltd | Word synchronizing pattern reproducing system |
JPS58169313A (en) * | 1982-03-31 | 1983-10-05 | Nec Home Electronics Ltd | Synchronization protecting circuit |
JPS59104731A (en) * | 1982-12-02 | 1984-06-16 | Sanyo Electric Co Ltd | Generating circuit of synchronizing circuit |
JPS6039948A (en) * | 1983-08-15 | 1985-03-02 | Seiko Epson Corp | Timing signal extracting circuit |
JPH0580850B2 (en) * | 1983-08-15 | 1993-11-10 | Seiko Epson Corp | |
JPS6070556A (en) * | 1983-09-28 | 1985-04-22 | Canon Inc | Information recording and reproducing device |
JPS6096033A (en) * | 1983-10-31 | 1985-05-29 | Sony Corp | System for detecting specific signal |
Also Published As
Publication number | Publication date |
---|---|
JPS6136306B2 (en) | 1986-08-18 |
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