JPS5648758A - Synchronous converter for video signal - Google Patents

Synchronous converter for video signal

Info

Publication number
JPS5648758A
JPS5648758A JP12501179A JP12501179A JPS5648758A JP S5648758 A JPS5648758 A JP S5648758A JP 12501179 A JP12501179 A JP 12501179A JP 12501179 A JP12501179 A JP 12501179A JP S5648758 A JPS5648758 A JP S5648758A
Authority
JP
Japan
Prior art keywords
video signal
signal
phase difference
phase
readout control
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
JP12501179A
Other languages
Japanese (ja)
Inventor
Hideji Hirakawa
Masaru Konno
Koichi Tanaka
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP12501179A priority Critical patent/JPS5648758A/en
Publication of JPS5648758A publication Critical patent/JPS5648758A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/04—Synchronising

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Synchronizing For Television (AREA)
  • Television Systems (AREA)

Abstract

PURPOSE:To prevent a video signal from lagging a sound signal by comparing an input video signal to the synchronizing signal component of a reference video signal and by exercising readout control over a memory part according to the phase difference. CONSTITUTION:Synchronizing signal component Is extracted from input video signal VIP and synchronizing signal component Ss extracted from a reference video signal are both supplied to phase comparison part 14, which compares the phase difference between both the synchronizing signal components to a reference phase. This comparison output is supplied to readout control part 13. Since the phase difference of phase comparator 14 is greater than a prescribed reference phase difference when input video signal VIP is not of its own, readout control part 13 is controlled with the output of phase comparison part 14 so that a normal readout timing signal will be outputted. When the input video signal is of its own, it is less than the prescribed reference phase difference, so readout control part 13 is so controlled that the output video signal will not lag much. Therefore, the delay of the video signal behind the sound signal can be suppressed as much as possible.
JP12501179A 1979-09-28 1979-09-28 Synchronous converter for video signal Pending JPS5648758A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12501179A JPS5648758A (en) 1979-09-28 1979-09-28 Synchronous converter for video signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12501179A JPS5648758A (en) 1979-09-28 1979-09-28 Synchronous converter for video signal

Publications (1)

Publication Number Publication Date
JPS5648758A true JPS5648758A (en) 1981-05-02

Family

ID=14899645

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12501179A Pending JPS5648758A (en) 1979-09-28 1979-09-28 Synchronous converter for video signal

Country Status (1)

Country Link
JP (1) JPS5648758A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59185473A (en) * 1983-04-06 1984-10-22 Tokyo Hoso:Kk Television synchronizing converter
JPH0170471U (en) * 1987-10-29 1989-05-10
JPH077657A (en) * 1993-12-09 1995-01-10 Sony Corp Video camera equipment

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59185473A (en) * 1983-04-06 1984-10-22 Tokyo Hoso:Kk Television synchronizing converter
JPH0170471U (en) * 1987-10-29 1989-05-10
JPH077657A (en) * 1993-12-09 1995-01-10 Sony Corp Video camera equipment

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