JPS5471931A - Ghost elimination unit - Google Patents

Ghost elimination unit

Info

Publication number
JPS5471931A
JPS5471931A JP13929377A JP13929377A JPS5471931A JP S5471931 A JPS5471931 A JP S5471931A JP 13929377 A JP13929377 A JP 13929377A JP 13929377 A JP13929377 A JP 13929377A JP S5471931 A JPS5471931 A JP S5471931A
Authority
JP
Japan
Prior art keywords
signal
ghost
signals
amplitude
polarity
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
JP13929377A
Other languages
Japanese (ja)
Inventor
Namio Yamaguchi
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP13929377A priority Critical patent/JPS5471931A/en
Publication of JPS5471931A publication Critical patent/JPS5471931A/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)
  • Noise Elimination (AREA)

Abstract

PURPOSE:To eliminate effectively ghost signals and display the delay time by controlling automatically the amplitude and the polarity of delay video signals by the detection output which accords to the amplitude and the polarity of ghost signals. CONSTITUTION:Video signal b obtained by adding a ghost signal to transmitting video signal a is supplied to adder circuit 5, and the output becomes signal c through variable delay circuit 6. Signal c is inputted to synthesizer circuit 5 through amplitude polarity adjustment circuit 7 and is synthesized with signal b, and as a result, a video signal with a ghost signal eliminated is outputted to terminal 8. In this case, signals b and c are applied to high-band extractor circuits 9 and 10 to extract only high-band components d and e, and these components are multiplied in 11 to obtain detection output f. This signal f is applied to circuit 7 through LPF 12 to control automatically the amplitude and the polarity. Further, signals b and c are multiplied in 18 through high-band extractor circuits 14 and 15 respectively, so that the delay time of the ghost signal can be displayed on 18.
JP13929377A 1977-11-18 1977-11-18 Ghost elimination unit Pending JPS5471931A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13929377A JPS5471931A (en) 1977-11-18 1977-11-18 Ghost elimination unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13929377A JPS5471931A (en) 1977-11-18 1977-11-18 Ghost elimination unit

Publications (1)

Publication Number Publication Date
JPS5471931A true JPS5471931A (en) 1979-06-08

Family

ID=15241899

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13929377A Pending JPS5471931A (en) 1977-11-18 1977-11-18 Ghost elimination unit

Country Status (1)

Country Link
JP (1) JPS5471931A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5055214A (en) * 1973-09-11 1975-05-15
JPS5186312A (en) * 1975-01-28 1976-07-28 Hitachi Ltd

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5055214A (en) * 1973-09-11 1975-05-15
JPS5186312A (en) * 1975-01-28 1976-07-28 Hitachi Ltd

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