JPS5799871A - Vertical synchronizing signal separation circuit - Google Patents

Vertical synchronizing signal separation circuit

Info

Publication number
JPS5799871A
JPS5799871A JP17621980A JP17621980A JPS5799871A JP S5799871 A JPS5799871 A JP S5799871A JP 17621980 A JP17621980 A JP 17621980A JP 17621980 A JP17621980 A JP 17621980A JP S5799871 A JPS5799871 A JP S5799871A
Authority
JP
Japan
Prior art keywords
signal
vertical synchronizing
subcarrier frequency
color subcarrier
synchronizing signals
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.)
Granted
Application number
JP17621980A
Other languages
Japanese (ja)
Other versions
JPS5943871B2 (en
Inventor
Kazuo Ozeki
Shunichi Onishi
Masaharu Obara
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
Japan Broadcasting Corp
Original Assignee
Toshiba Corp
Nippon Hoso Kyokai NHK
Tokyo Shibaura Electric Co Ltd
Japan Broadcasting Corp
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, Nippon Hoso Kyokai NHK, Tokyo Shibaura Electric Co Ltd, Japan Broadcasting Corp filed Critical Toshiba Corp
Priority to JP17621980A priority Critical patent/JPS5943871B2/en
Publication of JPS5799871A publication Critical patent/JPS5799871A/en
Publication of JPS5943871B2 publication Critical patent/JPS5943871B2/en
Expired 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
    • H04N5/08—Separation of synchronising signals from picture signals

Landscapes

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

Abstract

PURPOSE:To separate vertical synchronizing signals surely, by discriminating the vertical blanking period, after detecting the presence or absence of signal component of color subcarrier frequency existing in the tail edge and video signals of horizontal synchronizing signals of a composite television signal. CONSTITUTION:When a composite television signal is inputted to an input terminal 1, the signal component of a color subcarrier frequency is picked up at a band-pass filter 2 and given to an envelope detector 3, and the envelope level signal of the signal component of the color subcarrier frequency can be obtained. This signal is compared with a reference level to be determined and becomes a binary information, which is inputted to a triggerable monostable multivibrator 6, the vertical blanking period is discriminated and vertical synchronizing signals are picked up at an output terminal 7. Since the position of the signal component of the color subcarrier frequency is unchanged independently of ghost, the vertical synchronizing signals can be separated surely.
JP17621980A 1980-12-13 1980-12-13 Vertical synchronization signal separation circuit Expired JPS5943871B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17621980A JPS5943871B2 (en) 1980-12-13 1980-12-13 Vertical synchronization signal separation circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17621980A JPS5943871B2 (en) 1980-12-13 1980-12-13 Vertical synchronization signal separation circuit

Publications (2)

Publication Number Publication Date
JPS5799871A true JPS5799871A (en) 1982-06-21
JPS5943871B2 JPS5943871B2 (en) 1984-10-25

Family

ID=16009700

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17621980A Expired JPS5943871B2 (en) 1980-12-13 1980-12-13 Vertical synchronization signal separation circuit

Country Status (1)

Country Link
JP (1) JPS5943871B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0287682A1 (en) * 1986-10-28 1988-10-26 Mitsubishi Denki Kabushiki Kaisha Apparatus for magnetically recording and reproducing video signals

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0287682A1 (en) * 1986-10-28 1988-10-26 Mitsubishi Denki Kabushiki Kaisha Apparatus for magnetically recording and reproducing video signals

Also Published As

Publication number Publication date
JPS5943871B2 (en) 1984-10-25

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