JPS5669976A - Ghost reducing device - Google Patents

Ghost reducing device

Info

Publication number
JPS5669976A
JPS5669976A JP14678279A JP14678279A JPS5669976A JP S5669976 A JPS5669976 A JP S5669976A JP 14678279 A JP14678279 A JP 14678279A JP 14678279 A JP14678279 A JP 14678279A JP S5669976 A JPS5669976 A JP S5669976A
Authority
JP
Japan
Prior art keywords
delay line
inputted
signal
ghost
time
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
JP14678279A
Other languages
Japanese (ja)
Inventor
Kenji Sato
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 JP14678279A priority Critical patent/JPS5669976A/en
Publication of JPS5669976A publication Critical patent/JPS5669976A/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
    • H04N5/14—Picture signal circuitry for video frequency region
    • H04N5/21—Circuitry for suppressing or minimising disturbance, e.g. moiré or halo
    • H04N5/211—Ghost signal cancellation

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Picture Signal Circuits (AREA)

Abstract

PURPOSE:To reduce ghosts by simple circuit constitution with only one delay line. CONSTITUTION:An input signal (vertical synchronizing part of video signal: a-2) is differentiated to obtain differential values alpha1 and beta1. The above-mentioned differential outputs are delayed by time nT through tapped delay line A to obtain differential value alpha2. Then when alpha2 is inputted to peak pulse generating circuit 14, circuit 14 generates peak detection pulse (e-2), since mask pulse (d-2) is previously inputted, to turn on switches 1b-nb, so that differential value beta2 of the ghost will be held at the corresponding position in memory C through the switch that corresponds to delay time mT. The input signal amplified 17 is multiplied the above-mentioned held voltage by multipliers 1d-nd, whose outputs are inputted to the corresponding positions of delay line A and subtracter 19 is applied with the signal delayed time mT behind the original signal, so that a video signal having the ghost eliminated can be obtained from subtracter 19.
JP14678279A 1979-11-13 1979-11-13 Ghost reducing device Pending JPS5669976A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14678279A JPS5669976A (en) 1979-11-13 1979-11-13 Ghost reducing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14678279A JPS5669976A (en) 1979-11-13 1979-11-13 Ghost reducing device

Publications (1)

Publication Number Publication Date
JPS5669976A true JPS5669976A (en) 1981-06-11

Family

ID=15415402

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14678279A Pending JPS5669976A (en) 1979-11-13 1979-11-13 Ghost reducing device

Country Status (1)

Country Link
JP (1) JPS5669976A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2479626A1 (en) * 1980-03-31 1981-10-02 Sony Corp CIRCUIT FOR REMOVING A FANTOME VIDEO IMAGE

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2479626A1 (en) * 1980-03-31 1981-10-02 Sony Corp CIRCUIT FOR REMOVING A FANTOME VIDEO IMAGE

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