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JPS5689173A - Vertical aperture correcting circuit - Google Patents

Vertical aperture correcting circuit

Info

Publication number
JPS5689173A
JPS5689173A JP16622179A JP16622179A JPS5689173A JP S5689173 A JPS5689173 A JP S5689173A JP 16622179 A JP16622179 A JP 16622179A JP 16622179 A JP16622179 A JP 16622179A JP S5689173 A JPS5689173 A JP S5689173A
Authority
JP
Japan
Prior art keywords
signal
circuit
vertical aperture
supplied
luminance 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.)
Pending
Application number
JP16622179A
Other languages
Japanese (ja)
Inventor
Sadaaki Tanaka
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.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Priority to JP16622179A priority Critical patent/JPS5689173A/en
Priority to NL8006811A priority patent/NL8006811A/en
Priority to GB8040227A priority patent/GB2067045B/en
Priority to AT618180A priority patent/AT379924B/en
Priority to FR8027131A priority patent/FR2473240B1/en
Priority to CA000367207A priority patent/CA1147848A/en
Priority to DE19803048544 priority patent/DE3048544A1/en
Publication of JPS5689173A publication Critical patent/JPS5689173A/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
    • H04N5/20—Circuitry for controlling amplitude response
    • H04N5/205—Circuitry for controlling amplitude response for correcting amplitude versus frequency characteristic
    • H04N5/208—Circuitry for controlling amplitude response for correcting amplitude versus frequency characteristic for compensating for attenuation of high frequency components, e.g. crispening, aperture distortion correction

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Picture Signal Circuits (AREA)
  • Color Television Image Signal Generators (AREA)
  • Processing Of Color Television Signals (AREA)
  • Studio Circuits (AREA)

Abstract

PURPOSE: To correct the vertical aperture while reducing or eliminating line crawl, by correcting the luminance signal by the signal obtained by slicing the signal indicating the level change of the luminance signal.
CONSTITUTION: Luminance signal Ea from image pickup tube 1 is not only supplied to adding circuit 3 and subtracting circuit 12 through process amplifier 2 but also supplied to delay circuit 11 to generate signal Eb. Signal Ec indicating level change of signal E is formed in subtracting circuit 12 by expression Ec=Ea-Eb, and this signal Ec is sliced by slice circuit 21 to obtain signal Ed indicating minute level fluctuation of luminance signal Ea. Signal Ed is subtracted 3 from luminance signal Ea to obtain luminance signal Ee without line crawl. Signal Ec from circuit 12 is supplied to clip circuit 24 and becomes vertical aperture correcting signal Ef and is supplied to adding circuit 3. Consequently, since signal Ef is added to signal Ee, luminance signal Ey without line crawl components and with the vertical aperture corrected is obtained from circuit 3.
COPYRIGHT: (C)1981,JPO&Japio
JP16622179A 1979-12-20 1979-12-20 Vertical aperture correcting circuit Pending JPS5689173A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
JP16622179A JPS5689173A (en) 1979-12-20 1979-12-20 Vertical aperture correcting circuit
NL8006811A NL8006811A (en) 1979-12-20 1980-12-16 VIDEO SIGNAL PROCESSING CIRCUIT, IN PARTICULAR FOR THE benefit of VERTICAL APERATURE CORRECTION.
GB8040227A GB2067045B (en) 1979-12-20 1980-12-16 Vertical aperture correction of a video signal
AT618180A AT379924B (en) 1979-12-20 1980-12-18 VERTICAL APERTURE CORRECTION
FR8027131A FR2473240B1 (en) 1979-12-20 1980-12-19 COLOR CAMERA HAVING A VERTICAL OPENING CORRECTION CIRCUIT
CA000367207A CA1147848A (en) 1979-12-20 1980-12-19 Vertical aperture correction circuit
DE19803048544 DE3048544A1 (en) 1979-12-20 1980-12-22 VERTICAL CORRECTION CIRCUIT

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16622179A JPS5689173A (en) 1979-12-20 1979-12-20 Vertical aperture correcting circuit

Publications (1)

Publication Number Publication Date
JPS5689173A true JPS5689173A (en) 1981-07-20

Family

ID=15827350

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16622179A Pending JPS5689173A (en) 1979-12-20 1979-12-20 Vertical aperture correcting circuit

Country Status (7)

Country Link
JP (1) JPS5689173A (en)
AT (1) AT379924B (en)
CA (1) CA1147848A (en)
DE (1) DE3048544A1 (en)
FR (1) FR2473240B1 (en)
GB (1) GB2067045B (en)
NL (1) NL8006811A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02142282A (en) * 1988-11-24 1990-05-31 Hitachi Denshi Ltd Video signal processor
JPH04309075A (en) * 1991-04-05 1992-10-30 Sanyo Electric Co Ltd Luminance signal processing circuit

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3140761C2 (en) * 1981-10-14 1983-08-11 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Circuit for steepening the edges of a video signal, especially for a video recorder
US4628867A (en) * 1983-02-16 1986-12-16 Brougham Peter H Water supply to watering troughs
GB2151429B (en) * 1983-11-26 1987-03-18 Toshiba Kk Vertical contour correction device
JPS60114090A (en) * 1983-11-26 1985-06-20 Toshiba Corp Vertical contour correction device
DE3418794A1 (en) * 1984-05-19 1985-11-21 Grundig E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig holländ. Stiftung & Co KG, 8510 Fürth METHOD FOR TRANSMITTING NARROW TAPE
KR890004853B1 (en) * 1985-01-28 1989-11-29 미쓰비시전기 주식회사 Circuits for processing video signals
JPS62239670A (en) * 1986-04-11 1987-10-20 Ikegami Tsushinki Co Ltd Contour emphasizing device
JPH01220975A (en) * 1988-02-29 1989-09-04 Toshiba Corp Picture quality adjustment circuit
KR920008629B1 (en) * 1990-09-27 1992-10-02 삼성전자 주식회사 Compensation circuit stressing image
US5287174A (en) * 1991-04-05 1994-02-15 Sanyo Electric Co., Ltd. Vertical resolution correcting circuit for video signal
JP2756070B2 (en) * 1992-04-09 1998-05-25 三菱電機エンジニアリング株式会社 Waveform shaping method, waveform shaping device, and contour correction device for carrier color signal

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5087228A (en) * 1973-12-03 1975-07-14
JPS53132214A (en) * 1977-04-25 1978-11-17 Sony Corp Vertical aperture correction circuit

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS517381B1 (en) * 1970-10-14 1976-03-06
NL158987B (en) * 1972-06-10 1978-12-15 Philips Nv APERTURE CORRECTOR FOR A TELEVISION IMAGE SIGNAL, AS WELL AS A TELEVISION RECORDING DEVICE, FITTED THIS.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5087228A (en) * 1973-12-03 1975-07-14
JPS53132214A (en) * 1977-04-25 1978-11-17 Sony Corp Vertical aperture correction circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02142282A (en) * 1988-11-24 1990-05-31 Hitachi Denshi Ltd Video signal processor
JPH04309075A (en) * 1991-04-05 1992-10-30 Sanyo Electric Co Ltd Luminance signal processing circuit

Also Published As

Publication number Publication date
NL8006811A (en) 1981-07-16
FR2473240A1 (en) 1981-07-10
DE3048544C2 (en) 1989-01-05
ATA618180A (en) 1985-07-15
GB2067045B (en) 1984-02-01
FR2473240B1 (en) 1985-10-11
GB2067045A (en) 1981-07-15
CA1147848A (en) 1983-06-07
AT379924B (en) 1986-03-10
DE3048544A1 (en) 1981-09-17

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