JPS6439889A - Video signal correcting circuit - Google Patents
Video signal correcting circuitInfo
- Publication number
- JPS6439889A JPS6439889A JP19689487A JP19689487A JPS6439889A JP S6439889 A JPS6439889 A JP S6439889A JP 19689487 A JP19689487 A JP 19689487A JP 19689487 A JP19689487 A JP 19689487A JP S6439889 A JPS6439889 A JP S6439889A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- band correcting
- horizontal synchronizing
- video signal
- detecting
- 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
Abstract
PURPOSE:To automatically correct a frequency characteristic by adding a band correcting signal to a video signal, transmitting to a coaxial cable, receiving the video signal, and detecting the band correcting signal. CONSTITUTION:At the time point of a horizontal synchronizing signal fH detected by a synchronizing detecting circuit 4, a band correcting signal f1 and the horizontal synchronizing signal fH are added by a mixer 6. The added signal is synthesized by a signal synthesizer 8 and sent from a terminal 1b to a coaxial cable 2a. The horizontal synchronizing signal fH of a video signal fi is detected in a synchronizing. detecting circuit 11. Accordingly, since a band correcting signal detecting circuit 12 is gated at the time point of detecting the horizontal synchronizing signal fH, the band correcting signal f1, which overlappes the horizontal synchronizing signal fH, can be separated. Thus, a desired band correcting can be executed by an input to a band correcting voltage generating circuit 12 to generate a voltage corresponding to the level of the separated band correcting signal f1.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19689487A JPS6439889A (en) | 1987-08-05 | 1987-08-05 | Video signal correcting circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19689487A JPS6439889A (en) | 1987-08-05 | 1987-08-05 | Video signal correcting circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6439889A true JPS6439889A (en) | 1989-02-10 |
Family
ID=16365417
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP19689487A Pending JPS6439889A (en) | 1987-08-05 | 1987-08-05 | Video signal correcting circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6439889A (en) |
-
1987
- 1987-08-05 JP JP19689487A patent/JPS6439889A/en active Pending
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