JPS6439889A - Video signal correcting circuit - Google Patents

Video signal correcting circuit

Info

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
Application number
JP19689487A
Other languages
Japanese (ja)
Inventor
Kazuhiko Asaka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SWCC Corp
Original Assignee
Showa Electric Wire and Cable Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Showa Electric Wire and Cable Co filed Critical Showa Electric Wire and Cable Co
Priority to JP19689487A priority Critical patent/JPS6439889A/en
Publication of JPS6439889A publication Critical patent/JPS6439889A/en
Pending legal-status Critical Current

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.
JP19689487A 1987-08-05 1987-08-05 Video signal correcting circuit Pending JPS6439889A (en)

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)

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