JPS5799870A - Vertical synchronizing signal separation circuit - Google Patents

Vertical synchronizing signal separation circuit

Info

Publication number
JPS5799870A
JPS5799870A JP17621880A JP17621880A JPS5799870A JP S5799870 A JPS5799870 A JP S5799870A JP 17621880 A JP17621880 A JP 17621880A JP 17621880 A JP17621880 A JP 17621880A JP S5799870 A JPS5799870 A JP S5799870A
Authority
JP
Japan
Prior art keywords
vertical synchronizing
signal
vertical
synchronizing signals
synchronizing signal
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
JP17621880A
Other languages
Japanese (ja)
Other versions
JPS613148B2 (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 JP17621880A priority Critical patent/JPS5799870A/en
Publication of JPS5799870A publication Critical patent/JPS5799870A/en
Publication of JPS613148B2 publication Critical patent/JPS613148B2/ja
Granted 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 detecting the time interval of synchronizing signal part after its picking up, discriminating the vertical blanking period where the vertical synchronizing signals and equalizing pulses exist and separating the vertical synchronizing signals. CONSTITUTION:The minimum value of a synchronizing signal of a composite television signal inputted to an input terminal 1 is always detected, a level greater by a minute amount epsilon from this minimum value toward the video signal side is taken as a threshold level, the comparison between the composite television signal and this threshold level is decided at a comparator 7, and the vertical synchronizing signals are separated and picked up by discriminating the horizontal synchronizing signal, equalizing pulse in the vertical blanking period, and the time interval of changing point of the result of decision produced at the vertical synchronizing signal. Thus, even if the variation of DC level due to ghost or the like is present in the composite television signal, the separation and picking up of the vertical synchronizing signals can be made surely.
JP17621880A 1980-12-13 1980-12-13 Vertical synchronizing signal separation circuit Granted JPS5799870A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17621880A JPS5799870A (en) 1980-12-13 1980-12-13 Vertical synchronizing signal separation circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17621880A JPS5799870A (en) 1980-12-13 1980-12-13 Vertical synchronizing signal separation circuit

Publications (2)

Publication Number Publication Date
JPS5799870A true JPS5799870A (en) 1982-06-21
JPS613148B2 JPS613148B2 (en) 1986-01-30

Family

ID=16009681

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17621880A Granted JPS5799870A (en) 1980-12-13 1980-12-13 Vertical synchronizing signal separation circuit

Country Status (1)

Country Link
JP (1) JPS5799870A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100780937B1 (en) 2004-12-20 2007-12-03 삼성전자주식회사 Digital processing apparatus and method for estimating horizontal sync included in video signal

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100780937B1 (en) 2004-12-20 2007-12-03 삼성전자주식회사 Digital processing apparatus and method for estimating horizontal sync included in video signal

Also Published As

Publication number Publication date
JPS613148B2 (en) 1986-01-30

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