JPS54104731A - Ghost reducing unit - Google Patents

Ghost reducing unit

Info

Publication number
JPS54104731A
JPS54104731A JP1167678A JP1167678A JPS54104731A JP S54104731 A JPS54104731 A JP S54104731A JP 1167678 A JP1167678 A JP 1167678A JP 1167678 A JP1167678 A JP 1167678A JP S54104731 A JPS54104731 A JP S54104731A
Authority
JP
Japan
Prior art keywords
circuit
circuits
output
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
JP1167678A
Other languages
Japanese (ja)
Inventor
Minoru Miyata
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 JP1167678A priority Critical patent/JPS54104731A/en
Publication of JPS54104731A publication Critical patent/JPS54104731A/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)
  • Noise Elimination (AREA)
  • Picture Signal Circuits (AREA)

Abstract

PURPOSE:To reduce the ghost accurately, by providing two units providing variable delay circuit, differentiating circuit, amplitude and polarity conversion circuit, phase detection circuit, and DC conversion circuit, and by adjusting the amplitude and polarity of signal automatically. CONSTITUTION:The variable delay circuit 2 delaying composite video signal and the amplitude and polarity adjusting circuit 3 adjusting the amplitude and the polarity of the output of the circuit 2 are provided, and further, the delay circuit 4 delaying the output of the circuit 2, the amplitude and polarity adjusting circuit 5 adjusting the amplitude and the polarity of the output of the circuit 4, and the synthesis circuit 1 synthesizing the output of the circuits 5 and 3 with the composite video signal at the input terminal 1, are provided. Futher, the differentiating circuit 6 differentiating the output of the circuit 1, and the differentiating circuits 10 and 7 differentiating the output of the circuits 4 and 2 respectively, are provided, and also, the phase detection circuits 11 and 8 inputting the differentiated output of the circuits 10,6 and 10 and 7 respectively and performing phase detection, and the DC conversion circuits 12 and 9 converting the output of the circuits 11 and 8 into DC, are provided, controlling the circuits 3 and 5 with the output of the circuits 12 and 9.
JP1167678A 1978-02-03 1978-02-03 Ghost reducing unit Pending JPS54104731A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1167678A JPS54104731A (en) 1978-02-03 1978-02-03 Ghost reducing unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1167678A JPS54104731A (en) 1978-02-03 1978-02-03 Ghost reducing unit

Publications (1)

Publication Number Publication Date
JPS54104731A true JPS54104731A (en) 1979-08-17

Family

ID=11784588

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1167678A Pending JPS54104731A (en) 1978-02-03 1978-02-03 Ghost reducing unit

Country Status (1)

Country Link
JP (1) JPS54104731A (en)

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