JPS6429175A - Synchronizing signal generation circuit in television receiver - Google Patents
Synchronizing signal generation circuit in television receiverInfo
- Publication number
- JPS6429175A JPS6429175A JP18587387A JP18587387A JPS6429175A JP S6429175 A JPS6429175 A JP S6429175A JP 18587387 A JP18587387 A JP 18587387A JP 18587387 A JP18587387 A JP 18587387A JP S6429175 A JPS6429175 A JP S6429175A
- Authority
- JP
- Japan
- Prior art keywords
- synchronizing signal
- cycle
- inputted
- circuit
- horizontal synchronizing
- 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
- Synchronizing For Television (AREA)
Abstract
PURPOSE:To enable a synchronizing signal with high stability to be generated by detecting the cycle of a separated synchronizing signal from it, smoothing the fluctuation part of the cycle, eliminating the fluctuation part when it is bigger than a threshold and generating the synchronizing signal based on the cycle of the smoothed synchronizing signal. CONSTITUTION:A compound video signal 1 is inputted to a horizontal synchronizing separator circuit 2 and the digital data of the cycle detected by a cycle detection circuit 5 is inputted to a smoothing circuit 6 and smoothed. The smoothed cycle data of the synchronizing signal is inputted to the elimination circuit 10 of the synchronizing signal cycle data of a discontinuous horizontal synchronizing signal at the time of switching a channel. On the other hand, the horizontal synchronizing signal separated by the horizontal synchronizing separator circuit 2 is inputted to a continuity detection circuit 3 and the continuity of the horizontal synchronizing signal is monitored. When the continuity is detected, a control signal 16 is inputted to the circuit 10 eliminating the discontinuous cycle data of the horizontal synchronizing signal and the cycle data at the time of detecting the continuity before that is outputted when the discontinuity is detected. Thus the synchronizing signal with high stability can be generated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18587387A JPS6429175A (en) | 1987-07-24 | 1987-07-24 | Synchronizing signal generation circuit in television receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18587387A JPS6429175A (en) | 1987-07-24 | 1987-07-24 | Synchronizing signal generation circuit in television receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6429175A true JPS6429175A (en) | 1989-01-31 |
Family
ID=16178372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18587387A Pending JPS6429175A (en) | 1987-07-24 | 1987-07-24 | Synchronizing signal generation circuit in television receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6429175A (en) |
-
1987
- 1987-07-24 JP JP18587387A patent/JPS6429175A/en active Pending
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