JPS6437767A - System and device for modulating and demodulating video signal - Google Patents

System and device for modulating and demodulating video signal

Info

Publication number
JPS6437767A
JPS6437767A JP62192465A JP19246587A JPS6437767A JP S6437767 A JPS6437767 A JP S6437767A JP 62192465 A JP62192465 A JP 62192465A JP 19246587 A JP19246587 A JP 19246587A JP S6437767 A JPS6437767 A JP S6437767A
Authority
JP
Japan
Prior art keywords
signal
video signal
input terminal
modulated
time
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
JP62192465A
Other languages
Japanese (ja)
Inventor
Kazuhito Ohashi
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP62192465A priority Critical patent/JPS6437767A/en
Priority to DE19883814447 priority patent/DE3814447A1/en
Publication of JPS6437767A publication Critical patent/JPS6437767A/en
Priority to US07/831,084 priority patent/US5231507A/en
Pending legal-status Critical Current

Links

Landscapes

  • Television Signal Processing For Recording (AREA)

Abstract

PURPOSE:To modulate a video signal without reducing information utilized for correcting a time base by replacing the synchronizing signal part of the video signal with a reference signal when the video signal to include a synchronizing signal is angle-modulated and suppressing the turbulence of a demodulated signal to be generated preceding and succeeding to the replacement when the modulated signal is demodulated. CONSTITUTION:By replacing the synchronizing signal part of the video signal with the reference signal at the time of preparing an angle-modulated signal, the turbulence of the modulated wave is suppressed and by causing the synchronizing signal part in the demodulated signal to be a constant voltage at the time of the demodulating, an influence given to an image reproducing is decreased. Namely, a switch S2 is controlled by a composite sinchronizing signal (c-sync) inputted from a terminal B (separated from the video signal inputted to an input terminal A). During a period corresponding to the sync-chip part of the video signal inputted to the input terminal A, an output terminal is connected to an input terminal E and in the other case, the output terminal is connected to an input terminal D. Thus, the correction of a time base fluctuation can be securely executed at the time of the reproduction.
JP62192465A 1987-04-28 1987-07-31 System and device for modulating and demodulating video signal Pending JPS6437767A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP62192465A JPS6437767A (en) 1987-07-31 1987-07-31 System and device for modulating and demodulating video signal
DE19883814447 DE3814447A1 (en) 1987-04-28 1988-04-28 Apparatus for recording and/or reproducing information signals
US07/831,084 US5231507A (en) 1987-04-28 1992-02-05 Information signal recording/reproducing apparatus with time base correction facility

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62192465A JPS6437767A (en) 1987-07-31 1987-07-31 System and device for modulating and demodulating video signal

Publications (1)

Publication Number Publication Date
JPS6437767A true JPS6437767A (en) 1989-02-08

Family

ID=16291748

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62192465A Pending JPS6437767A (en) 1987-04-28 1987-07-31 System and device for modulating and demodulating video signal

Country Status (1)

Country Link
JP (1) JPS6437767A (en)

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