JPS6413874A - Picture quality adjusting circuit - Google Patents
Picture quality adjusting circuitInfo
- Publication number
- JPS6413874A JPS6413874A JP62170229A JP17022987A JPS6413874A JP S6413874 A JPS6413874 A JP S6413874A JP 62170229 A JP62170229 A JP 62170229A JP 17022987 A JP17022987 A JP 17022987A JP S6413874 A JPS6413874 A JP S6413874A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- picture quality
- level
- quality adjusting
- circuit
- 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
- 230000015556 catabolic process Effects 0.000 abstract 1
- 238000006731 degradation reaction Methods 0.000 abstract 1
- 230000007257 malfunction Effects 0.000 abstract 1
- 238000000926 separation method Methods 0.000 abstract 1
Landscapes
- Picture Signal Circuits (AREA)
Abstract
PURPOSE:To prevent the malfunction of a synchronization separation and the degradation of an S/N by prohibiting a picture quality adjusting processing in a synchronizing signal part and a back porch part in which a color burst signal is overlapped. CONSTITUTION:For a video signal inputted from an input terminal 1, a synchro nizing chip level is aligned by a clamper 8. To this signal, a lower level than a voltage level which is slightly higher than a back porch level is suppressed by a limiter 9. Based on the output signal of the limiter 9, a picture quality adjusting signal is extracted by a picture quality adjusting signal extracting circuit 2 and after this picture quality adjusting signal is level-adjusted by a level adjusting circuit 10, it is added to the video signal by an adding circuit 6.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62170229A JPS6413874A (en) | 1987-07-08 | 1987-07-08 | Picture quality adjusting circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62170229A JPS6413874A (en) | 1987-07-08 | 1987-07-08 | Picture quality adjusting circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6413874A true JPS6413874A (en) | 1989-01-18 |
Family
ID=15901060
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62170229A Pending JPS6413874A (en) | 1987-07-08 | 1987-07-08 | Picture quality adjusting circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6413874A (en) |
-
1987
- 1987-07-08 JP JP62170229A patent/JPS6413874A/en active Pending
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