DE69116250T2 - Kontrastkorrektor für Videosignal - Google Patents

Kontrastkorrektor für Videosignal

Info

Publication number
DE69116250T2
DE69116250T2 DE69116250T DE69116250T DE69116250T2 DE 69116250 T2 DE69116250 T2 DE 69116250T2 DE 69116250 T DE69116250 T DE 69116250T DE 69116250 T DE69116250 T DE 69116250T DE 69116250 T2 DE69116250 T2 DE 69116250T2
Authority
DE
Germany
Prior art keywords
video signal
contrast corrector
corrector
contrast
video
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.)
Expired - Fee Related
Application number
DE69116250T
Other languages
English (en)
Other versions
DE69116250D1 (de
Inventor
Atsuhisa Kageyama
Hazama Yasue
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
Application granted granted Critical
Publication of DE69116250D1 publication Critical patent/DE69116250D1/de
Publication of DE69116250T2 publication Critical patent/DE69116250T2/de
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
    • H04N9/77—Circuits for processing the brightness signal and the chrominance signal relative to each other, e.g. adjusting the phase of the brightness signal relative to the colour signal, correcting differential gain or differential phase
    • 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
    • H04N5/16—Circuitry for reinsertion of dc and slowly varying components of signal; Circuitry for preservation of black or white level
    • H04N5/18—Circuitry for reinsertion of dc and slowly varying components of signal; Circuitry for preservation of black or white level by means of "clamp" circuit operated by switching circuit
    • H04N5/185—Circuitry for reinsertion of dc and slowly varying components of signal; Circuitry for preservation of black or white level by means of "clamp" circuit operated by switching circuit for the black level
    • 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
    • H04N5/202—Gamma control

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Processing Of Color Television Signals (AREA)
  • Picture Signal Circuits (AREA)
DE69116250T 1990-07-17 1991-07-12 Kontrastkorrektor für Videosignal Expired - Fee Related DE69116250T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2187294A JP2784839B2 (ja) 1990-07-17 1990-07-17 映像信号の階調補正装置

Publications (2)

Publication Number Publication Date
DE69116250D1 DE69116250D1 (de) 1996-02-22
DE69116250T2 true DE69116250T2 (de) 1996-09-19

Family

ID=16203481

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69116250T Expired - Fee Related DE69116250T2 (de) 1990-07-17 1991-07-12 Kontrastkorrektor für Videosignal

Country Status (7)

Country Link
US (1) US5255080A (de)
EP (1) EP0467602B1 (de)
JP (1) JP2784839B2 (de)
KR (1) KR930011182B1 (de)
CA (1) CA2047149C (de)
DE (1) DE69116250T2 (de)
MY (1) MY106878A (de)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3016652B2 (ja) * 1992-02-07 2000-03-06 松下電器産業株式会社 ゲインコントロール回路
JP3136850B2 (ja) * 1993-07-28 2001-02-19 松下電器産業株式会社 映像信号の階調補正装置
JP3429842B2 (ja) * 1994-04-15 2003-07-28 松下電器産業株式会社 映像信号の画像情報検出装置
SG64404A1 (en) * 1996-11-06 1999-04-27 Sgs Thomson Microelectric Asia A method & apparatus for correcting colour difference signals
EP0963112B1 (de) * 1998-06-02 2004-04-21 Deutsche Thomson-Brandt Gmbh Verfahren und Vorrichtung zur dynamischen Kontrastverbesserung in Videobildern
JP3451583B2 (ja) * 1999-06-25 2003-09-29 Ｎｅｃ液晶テクノロジー株式会社 液晶表示装置のクランプ回路
JP2002095512A (ja) * 2000-09-21 2002-04-02 Komaya:Kk 貨幣類の識別構造
JP4659272B2 (ja) * 2001-05-31 2011-03-30 パナソニック株式会社 階調補正装置
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
US6894666B2 (en) 2001-12-12 2005-05-17 Samsung Sdi Co., Ltd. Contrast correcting circuit
JP3783645B2 (ja) * 2002-04-05 2006-06-07 株式会社日立製作所 コントラスト調整方法、コントラスト調整回路及びそれを用いた映像表示装置
JP3729157B2 (ja) * 2002-06-25 2005-12-21 ソニー株式会社 映像信号処理装置及び方法
KR100449744B1 (ko) * 2002-10-21 2004-09-22 삼성전자주식회사 영상 처리 장치에서의 화면 밝기 제어 방법 및 장치
JP4155043B2 (ja) * 2003-02-04 2008-09-24 松下電器産業株式会社 映像信号補正回路
KR100561377B1 (ko) 2003-12-10 2006-03-16 삼성전자주식회사 산화촉매장치 및 이를 구비한 습식 전자사진방식화상형성장치
JP4617989B2 (ja) * 2005-04-28 2011-01-26 株式会社日立製作所 映像処理装置

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1400427A (en) * 1971-11-08 1975-07-16 Rca Corp Video signal processing apparatus
US3928867A (en) * 1974-05-10 1975-12-23 Gen Electric Television receiver with picture level control
US4038685A (en) * 1975-03-31 1977-07-26 Rca Corporation Apparatus for automatic gamma control of television color signals
FR2406922A1 (fr) * 1977-10-21 1979-05-18 Thomson Csf Dispositif d'expansion de contraste video et systeme comportant un tel dispositif
DE3629403C2 (de) * 1986-08-29 1994-09-29 Agfa Gevaert Ag Verfahren zur Korrektur der Farbsättigung bei der elektronischen Bildverarbeitung
JPS645569U (de) * 1987-06-26 1989-01-12
DE3809303A1 (de) * 1988-03-19 1989-10-05 Itt Ind Gmbh Deutsche Schaltungsanordnung zur farbsaettigungseinstellung
US5068718A (en) * 1988-11-04 1991-11-26 Fuji Photo Film Co., Ltd. Image quality correcting system for use with an imaging apparatus
US5003394A (en) * 1989-08-25 1991-03-26 Rca Licensing Corporation Dynamic video system including automatic contrast and "white-stretch" processing sections

Also Published As

Publication number Publication date
CA2047149A1 (en) 1992-01-18
JP2784839B2 (ja) 1998-08-06
KR920003767A (ko) 1992-02-29
EP0467602A2 (de) 1992-01-22
JPH0477179A (ja) 1992-03-11
MY106878A (en) 1995-08-30
EP0467602B1 (de) 1996-01-10
EP0467602A3 (en) 1993-04-28
US5255080A (en) 1993-10-19
DE69116250D1 (de) 1996-02-22
KR930011182B1 (ko) 1993-11-24
CA2047149C (en) 1998-05-05

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee