JPS57132479A - Synchronizing separation circuit - Google Patents

Synchronizing separation circuit

Info

Publication number
JPS57132479A
JPS57132479A JP1756881A JP1756881A JPS57132479A JP S57132479 A JPS57132479 A JP S57132479A JP 1756881 A JP1756881 A JP 1756881A JP 1756881 A JP1756881 A JP 1756881A JP S57132479 A JPS57132479 A JP S57132479A
Authority
JP
Japan
Prior art keywords
circuit
horizontal synchronizing
terminal
signal
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
JP1756881A
Other languages
Japanese (ja)
Other versions
JPS619787B2 (en
Inventor
Shigehiro Ito
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.)
Victor Company of Japan Ltd
Nippon Victor KK
Original Assignee
Victor Company of Japan Ltd
Nippon Victor KK
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 Victor Company of Japan Ltd, Nippon Victor KK filed Critical Victor Company of Japan Ltd
Priority to JP1756881A priority Critical patent/JPS57132479A/en
Publication of JPS57132479A publication Critical patent/JPS57132479A/en
Publication of JPS619787B2 publication Critical patent/JPS619787B2/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 and reproduce stably and surely horizontal synchronizing signal against ghost, by using a frequency component of the horizontal synchronizing signal at the part where a video signal component at a vertical blanking period is not in existing. CONSTITUTION:A video signal applied to a terminal l1 is applied to an addition filtering circuit SAA and a low pass filter circuit LPA. The SAA consists of a plurality of delay circuits and an addition circuit adding an input signal and output of each delay circuit, and constitutes a low pass filter, unnecessary harmonics is removed at the LPA, and a fundamental wave component of the vertical and horizontal synchronizing signals is obtained at a terminal l3. Next, a subtraction filter SDF of the next stage consists of a delay circuit and a subtraction circuit, and a frequency component of the horizontal synchronizing signal is obtained at an output terminal l4, and no video signal is in existing to the horizontal synchronizing signal component during the vertical blanking period. The signal at the terminal l4 is applied to a circuit PLP consisting of a PLL circuit via a gate circuit GAT and the reproduced horizontal synchronizing signal is obtained at a terminal l7.
JP1756881A 1981-02-10 1981-02-10 Synchronizing separation circuit Granted JPS57132479A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1756881A JPS57132479A (en) 1981-02-10 1981-02-10 Synchronizing separation circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1756881A JPS57132479A (en) 1981-02-10 1981-02-10 Synchronizing separation circuit

Publications (2)

Publication Number Publication Date
JPS57132479A true JPS57132479A (en) 1982-08-16
JPS619787B2 JPS619787B2 (en) 1986-03-26

Family

ID=11947516

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1756881A Granted JPS57132479A (en) 1981-02-10 1981-02-10 Synchronizing separation circuit

Country Status (1)

Country Link
JP (1) JPS57132479A (en)

Also Published As

Publication number Publication date
JPS619787B2 (en) 1986-03-26

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