CA2047371A1 - Circuit de compensation du niveau du noir - Google Patents

Circuit de compensation du niveau du noir

Info

Publication number
CA2047371A1
CA2047371A1 CA2047371A CA2047371A CA2047371A1 CA 2047371 A1 CA2047371 A1 CA 2047371A1 CA 2047371 A CA2047371 A CA 2047371A CA 2047371 A CA2047371 A CA 2047371A CA 2047371 A1 CA2047371 A1 CA 2047371A1
Authority
CA
Canada
Prior art keywords
level
black
circuit
low
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.)
Granted
Application number
CA2047371A
Other languages
English (en)
Other versions
CA2047371C (fr
Inventor
Hideaki Sadamatsu
Atsuhisa Kageyama
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
Individual
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 Individual filed Critical Individual
Publication of CA2047371A1 publication Critical patent/CA2047371A1/fr
Application granted granted Critical
Publication of CA2047371C publication Critical patent/CA2047371C/fr
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/64—Circuits for processing colour signals
    • H04N9/72—Circuits for processing colour signals for reinsertion of DC and slowly varying components of colour signals
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Picture Signal Circuits (AREA)
  • Processing Of Color Television Signals (AREA)
CA002047371A 1990-07-19 1991-07-18 Circuit de compensation du niveau du noir Expired - Fee Related CA2047371C (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2-189470 1990-07-19
JP2189470A JP2599020B2 (ja) 1990-07-19 1990-07-19 黒レベル補正回路

Publications (2)

Publication Number Publication Date
CA2047371A1 true CA2047371A1 (fr) 1992-01-20
CA2047371C CA2047371C (fr) 1995-12-05

Family

ID=16241806

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002047371A Expired - Fee Related CA2047371C (fr) 1990-07-19 1991-07-18 Circuit de compensation du niveau du noir

Country Status (7)

Country Link
US (1) US5262862A (fr)
EP (1) EP0467373B1 (fr)
JP (1) JP2599020B2 (fr)
KR (1) KR950007929B1 (fr)
CA (1) CA2047371C (fr)
DE (1) DE69117603T2 (fr)
MY (1) MY107706A (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5391944A (en) * 1992-01-22 1995-02-21 Matsushita Electric Industrial Co., Ltd. Image-tone control circuit and gradient adjusting circuit therefor
DE4239365A1 (de) * 1992-11-24 1994-05-26 Philips Patentverwaltung Schaltungsanordnung zum Verarbeiten eines Videosignals
JP3649043B2 (ja) 1999-06-07 2005-05-18 セイコーエプソン株式会社 画像表示装置及び方法、並びに、画像処理装置及び方法
KR100346840B1 (ko) * 1999-11-04 2002-08-03 삼성전자 주식회사 화면의 펄럭거림을 최소화하는 흑신장 장치 및 그 방법
JP3844430B2 (ja) * 2001-06-26 2006-11-15 三菱電機株式会社 映像信号処理装置および映像信号処理方法
JP3722740B2 (ja) * 2001-11-05 2005-11-30 三菱電機株式会社 映像処理装置及び映像処理方法
JP4740044B2 (ja) * 2006-06-06 2011-08-03 河村電器産業株式会社 機器収納キャビネット

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2406922A1 (fr) * 1977-10-21 1979-05-18 Thomson Csf Dispositif d'expansion de contraste video et systeme comportant un tel dispositif
JPS6043972A (ja) * 1983-08-22 1985-03-08 Sony Corp 映像の黒レベル再生回路
FR2606956A1 (fr) * 1986-11-14 1988-05-20 Radiotechnique Compelec Dispositif de conversion analogique-numerique comportant un dispositif de controle automatique de gain
JP2748442B2 (ja) * 1988-10-13 1998-05-06 ソニー株式会社 カラー映像信号の処理装置
US4937671A (en) * 1988-12-28 1990-06-26 Zenith Electronics Corporation Digital video black expander
US4975773A (en) * 1989-03-31 1990-12-04 Zenith Electronics Corporation Dynamic range video black level expander

Also Published As

Publication number Publication date
DE69117603D1 (de) 1996-04-11
DE69117603T2 (de) 1996-07-25
EP0467373B1 (fr) 1996-03-06
EP0467373A3 (en) 1992-12-09
KR950007929B1 (ko) 1995-07-21
MY107706A (en) 1996-05-30
EP0467373A2 (fr) 1992-01-22
US5262862A (en) 1993-11-16
KR920003787A (ko) 1992-02-29
JPH0479482A (ja) 1992-03-12
JP2599020B2 (ja) 1997-04-09
CA2047371C (fr) 1995-12-05

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed