DE69304227D1 - Verstärkungsreglerschaltung und Gradationskorrekturgerät - Google Patents

Verstärkungsreglerschaltung und Gradationskorrekturgerät

Info

Publication number
DE69304227D1
DE69304227D1 DE69304227T DE69304227T DE69304227D1 DE 69304227 D1 DE69304227 D1 DE 69304227D1 DE 69304227 T DE69304227 T DE 69304227T DE 69304227 T DE69304227 T DE 69304227T DE 69304227 D1 DE69304227 D1 DE 69304227D1
Authority
DE
Germany
Prior art keywords
control circuit
gain control
gradation corrector
corrector
gradation
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
DE69304227T
Other languages
English (en)
Other versions
DE69304227T2 (de
Inventor
Yosuke Izawa
Naoji Okumura
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
Publication of DE69304227D1 publication Critical patent/DE69304227D1/de
Application granted granted Critical
Publication of DE69304227T2 publication Critical patent/DE69304227T2/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
    • 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)
  • Television Receiver Circuits (AREA)
  • Control Of Amplification And Gain Control (AREA)
DE69304227T 1992-02-07 1993-02-05 Verstärkungsreglerschaltung und Gradationskorrekturgerät Expired - Fee Related DE69304227T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4021529A JP3016652B2 (ja) 1992-02-07 1992-02-07 ゲインコントロール回路

Publications (2)

Publication Number Publication Date
DE69304227D1 true DE69304227D1 (de) 1996-10-02
DE69304227T2 DE69304227T2 (de) 1997-01-16

Family

ID=12057488

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69304227T Expired - Fee Related DE69304227T2 (de) 1992-02-07 1993-02-05 Verstärkungsreglerschaltung und Gradationskorrekturgerät

Country Status (4)

Country Link
US (1) US5394194A (de)
EP (1) EP0560056B1 (de)
JP (1) JP3016652B2 (de)
DE (1) DE69304227T2 (de)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR0142290B1 (ko) * 1993-11-24 1998-06-15 김광호 장면적응 영상개선방법 및 그 회로
JP3959769B2 (ja) * 1996-04-12 2007-08-15 ソニー株式会社 ビデオカメラ装置、映像信号処理装置および映像信号の階調変換方法
JPH1013683A (ja) * 1996-06-21 1998-01-16 Nikon Corp 画像入力方法
US6127991A (en) * 1996-11-12 2000-10-03 Sanyo Electric Co., Ltd. Method of driving flat panel display apparatus for multi-gradation display
US6038341A (en) * 1997-03-06 2000-03-14 Matsushita Electric Industrial Co., Ltd. Histogram operating unit for video signals
US6750906B1 (en) * 1998-05-08 2004-06-15 Cirrus Logic, Inc. Histogram-based automatic gain control method and system for video applications
EP1134698A1 (de) * 2000-03-13 2001-09-19 Koninklijke Philips Electronics N.V. Videogerät mit Mitteln zur Histogrammveränderung
EP1164784A1 (de) * 2000-06-13 2001-12-19 Koninklijke Philips Electronics N.V. Verhinderung des Wölbungsphänomens
JP2004240103A (ja) 2003-02-05 2004-08-26 Pioneer Electronic Corp 表示装置
JP4645921B2 (ja) * 2008-11-27 2011-03-09 ソニー株式会社 画像信号処理装置および方法、プログラム、並びに撮像装置
GB0905312D0 (en) * 2009-03-27 2009-05-13 Qinetiq Ltd Electromagnetic field absorbing composition
JP5397079B2 (ja) * 2009-08-11 2014-01-22 ソニー株式会社 映像信号処理装置、エンハンスゲイン生成方法およびプログラム
US8934156B2 (en) * 2012-01-06 2015-01-13 Ricoh Company, Ltd. Image processing apparatus, image processing method, program, and recording medium

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4187519A (en) * 1978-08-17 1980-02-05 Rockwell International Corporation System for expanding the video contrast of an image
JPS60192468A (ja) * 1984-03-14 1985-09-30 Matsushita Electric Ind Co Ltd 画質調整装置
CA1226976A (en) * 1984-03-30 1987-09-15 Nobuyoshi Nakajima Method and apparatus for automatically correcting subtraction image density
FR2595153B1 (fr) * 1986-02-28 1990-12-07 Thomson Cgr Systeme d'imagerie numerique a reglage de l'echelle des gris, notamment pour la visualisation des vaisseaux sanguins
DE3620990C2 (de) * 1986-06-23 1995-04-13 Broadcast Television Syst Verfahren und Schaltungsanordnung zur nichtlinearen Übertragung eines Videosignals
US4771192A (en) * 1986-11-14 1988-09-13 The Grass Valley Group, Inc. Digital clip and gain circuit
JPS646589A (en) * 1987-06-29 1989-01-11 Dengen Kk Seal structure for valve rod
JPH01241988A (ja) * 1988-03-23 1989-09-26 Sharp Corp ディジタルａｇｃ回路
JP2670299B2 (ja) * 1988-07-07 1997-10-29 株式会社東芝 画像データ階調変換装置
JPH0810533B2 (ja) * 1988-10-20 1996-01-31 日本ビクター株式会社 磁気再生装置
US5099330A (en) * 1988-10-28 1992-03-24 Casio Computer Co., Ltd. Contrast control based on mean and deviation values
JP2517005Y2 (ja) * 1989-07-21 1996-11-13 パイオニア株式会社 映像信号伸張回路
JP2583325B2 (ja) * 1989-12-26 1997-02-19 池上通信機株式会社 階調補正回路
JPH048068A (ja) * 1990-04-26 1992-01-13 Canon Inc デジタル画像処理回路
JP3045245B2 (ja) * 1990-05-18 2000-05-29 ソニー株式会社 ガンマ補正回路
JP2993056B2 (ja) * 1990-06-13 1999-12-20 ソニー株式会社 映像信号処理装置
JPH0447766A (ja) * 1990-06-14 1992-02-17 Matsushita Electric Ind Co Ltd 映像信号の利得制御装置
JP2784839B2 (ja) * 1990-07-17 1998-08-06 松下電器産業株式会社 映像信号の階調補正装置
JP2936791B2 (ja) * 1991-05-28 1999-08-23 松下電器産業株式会社 階調補正装置
JP3019479B2 (ja) * 1991-06-28 2000-03-13 松下電器産業株式会社 階調補正装置

Also Published As

Publication number Publication date
US5394194A (en) 1995-02-28
DE69304227T2 (de) 1997-01-16
EP0560056A1 (de) 1993-09-15
EP0560056B1 (de) 1996-08-28
JPH05219411A (ja) 1993-08-27
JP3016652B2 (ja) 2000-03-06

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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