JPS57136868A - Synchronous separating circuit - Google Patents

Synchronous separating circuit

Info

Publication number
JPS57136868A
JPS57136868A JP2218781A JP2218781A JPS57136868A JP S57136868 A JPS57136868 A JP S57136868A JP 2218781 A JP2218781 A JP 2218781A JP 2218781 A JP2218781 A JP 2218781A JP S57136868 A JPS57136868 A JP S57136868A
Authority
JP
Japan
Prior art keywords
filter
synchronizing signal
output
component
horizontal synchronizing
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
JP2218781A
Other languages
Japanese (ja)
Other versions
JPS619788B2 (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 JP2218781A priority Critical patent/JPS57136868A/en
Publication of JPS57136868A publication Critical patent/JPS57136868A/en
Publication of JPS619788B2 publication Critical patent/JPS619788B2/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 prevent a phase shift due to a noise, a ghost, etc., by filtering a video signal through a filter which permits only a vertical and a horizontal synchronizing signal component to pass through it, and regenerating a synchronizing signal by using the horizontal synchronizing component during a vertical blanking interval. CONSTITUTION:A video signal is applied to an adding filter M-1 to eliminate an equalized pulse component and the high-frequency component of a video signal, thereby passing only a horizontal and a vertical synchronizing signal frequency component. The adding filter M-1 consists of an input-side low-pass filter, delay circuits which delays a filter output by a certain time respectively, an adder which adds the filter output and delay outputs, and an output-side low-pass filter. The output of the adding filter M-1 is applied to an analog switch M-2 to extract the horizontal synchronizing signal component during a vertical blanking interval, and it is applied to an automatic phase control circuit N to regenerate the horizontal synchronizing signal.
JP2218781A 1981-02-19 1981-02-19 Synchronous separating circuit Granted JPS57136868A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2218781A JPS57136868A (en) 1981-02-19 1981-02-19 Synchronous separating circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2218781A JPS57136868A (en) 1981-02-19 1981-02-19 Synchronous separating circuit

Publications (2)

Publication Number Publication Date
JPS57136868A true JPS57136868A (en) 1982-08-24
JPS619788B2 JPS619788B2 (en) 1986-03-26

Family

ID=12075784

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2218781A Granted JPS57136868A (en) 1981-02-19 1981-02-19 Synchronous separating circuit

Country Status (1)

Country Link
JP (1) JPS57136868A (en)

Also Published As

Publication number Publication date
JPS619788B2 (en) 1986-03-26

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