CA2021094A1 - Systeme video dynamique a sections de reglage automatique du contraste et du niveau du blanc - Google Patents

Systeme video dynamique a sections de reglage automatique du contraste et du niveau du blanc

Info

Publication number
CA2021094A1
CA2021094A1 CA2021094A CA2021094A CA2021094A1 CA 2021094 A1 CA2021094 A1 CA 2021094A1 CA 2021094 A CA2021094 A CA 2021094A CA 2021094 A CA2021094 A CA 2021094A CA 2021094 A1 CA2021094 A1 CA 2021094A1
Authority
CA
Canada
Prior art keywords
luminance
white
automatic contrast
system including
video system
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
CA2021094A
Other languages
English (en)
Other versions
CA2021094C (fr
Inventor
William Adamson Lagoni
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.)
Technicolor USA Inc
Original Assignee
Thomson Consumer Electronics Inc
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 Thomson Consumer Electronics Inc filed Critical Thomson Consumer Electronics Inc
Publication of CA2021094A1 publication Critical patent/CA2021094A1/fr
Application granted granted Critical
Publication of CA2021094C publication Critical patent/CA2021094C/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
    • H04N5/00—Details of television systems
    • H04N5/14—Picture signal circuitry for video frequency region
    • H04N5/20—Circuitry for controlling amplitude response
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/57—Control of contrast or brightness
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/52—Automatic gain control

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Television Receiver Circuits (AREA)
  • Transforming Electric Information Into Light Information (AREA)
  • Picture Signal Circuits (AREA)
  • Processing Of Color Television Signals (AREA)
  • Controls And Circuits For Display Device (AREA)
  • Apparatus For Radiation Diagnosis (AREA)
  • Video Image Reproduction Devices For Color Tv Systems (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
CA002021094A 1989-08-25 1990-07-12 Systeme video dynamique a sections de reglage automatique du contraste et du niveau du blanc Expired - Fee Related CA2021094C (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US398,845 1989-08-25
US07/398,845 US5003394A (en) 1989-08-25 1989-08-25 Dynamic video system including automatic contrast and "white-stretch" processing sections

Publications (2)

Publication Number Publication Date
CA2021094A1 true CA2021094A1 (fr) 1991-02-26
CA2021094C CA2021094C (fr) 2000-09-26

Family

ID=23577019

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002021094A Expired - Fee Related CA2021094C (fr) 1989-08-25 1990-07-12 Systeme video dynamique a sections de reglage automatique du contraste et du niveau du blanc

Country Status (15)

Country Link
US (1) US5003394A (fr)
EP (1) EP0414183B1 (fr)
JP (1) JPH0828850B2 (fr)
KR (1) KR0169964B1 (fr)
CN (1) CN1031091C (fr)
AT (1) ATE145310T1 (fr)
CA (1) CA2021094C (fr)
DE (1) DE69029110T2 (fr)
ES (1) ES2096568T3 (fr)
FI (1) FI97513C (fr)
MY (1) MY106733A (fr)
PT (1) PT95105B (fr)
RU (1) RU2100911C1 (fr)
SG (1) SG72626A1 (fr)
TR (1) TR26342A (fr)

Families Citing this family (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5396300A (en) * 1990-05-31 1995-03-07 Matsushita Electric Industrial Co., Ltd. Contrast correction device for correcting video signal contrast by varying luminance signal
JPH0437263A (ja) * 1990-05-31 1992-02-07 Matsushita Electric Ind Co Ltd 階調補正装置
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
US5125046A (en) * 1990-07-26 1992-06-23 Ronald Siwoff Digitally enhanced imager for the visually impaired
US5257108A (en) * 1990-08-06 1993-10-26 Koji Muraoka Video signal processing circuit for improving contrast for an LCD display
ES2043513B1 (es) * 1991-07-17 1994-08-01 Bertran Electronica Sa Circuito procesador no lineal de video para televisores en color.
US5847773A (en) * 1991-08-30 1998-12-08 Thomson Consumer Electronics, Inc. Video system including apparatus for deactivating an automatic control arrangement
US5162902A (en) * 1991-12-16 1992-11-10 Thomson Consumer Electronics, Inc. Non-linear luminance signal processor responsive to average picture level (APL) of displayed image
US5191420A (en) * 1991-12-16 1993-03-02 Thomson Consumer Electronics, Inc. Video system with feedback controlled "white stretch" processing and brightness compensation
JP3255677B2 (ja) * 1992-01-14 2002-02-12 松下電器産業株式会社 自動階調補正回路と輝度制御方法
US5317400A (en) * 1992-05-22 1994-05-31 Thomson Consumer Electronics, Inc. Non-linear customer contrast control for a color television with autopix
ES2118854T3 (es) * 1992-05-22 1998-10-01 Thomson Consumer Electronics Procesador de señal de video que emplea analisis de elementos de imagen.
US5245434A (en) * 1992-05-22 1993-09-14 Thomson Consumer Electronics, Inc. Autopix circuit with inserted vertical blanking
US5303056A (en) * 1992-09-14 1994-04-12 Eastman Kodak Company Dynamic gain correction for CRT printing
EP0589513B1 (fr) * 1992-09-22 1998-12-02 Koninklijke Philips Electronics N.V. Dispositif de traitement d'un signal d'image
US5872596A (en) * 1992-09-28 1999-02-16 Canon Kabushiki Kaisha Device for widening the dynamic range of solid-state image pickup elements
CN1135140A (zh) * 1995-02-27 1996-11-06 松下电器产业株式会社 用于多重图像显示的补偿电压发生装置及其视频显示装置
JP3501252B2 (ja) * 1995-06-16 2004-03-02 三菱電機株式会社 階調補正装置
SG64404A1 (en) * 1996-11-06 1999-04-27 Sgs Thomson Microelectric Asia A method & apparatus for correcting colour difference signals
KR100263862B1 (ko) * 1998-05-18 2000-08-16 김순택 투사 표시관의 구동 방법
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
WO2001039495A1 (fr) 1999-11-25 2001-05-31 Matsushita Electric Industrial Co., Ltd. Procede et appareil de correction de gradation, et affichage video
RU2198472C2 (ru) * 2000-05-16 2003-02-10 Немцова Светлана Рафаиловна Способ регистрации и анализа визуальных параметров телевизионных изображений
KR100393219B1 (ko) * 2001-03-13 2003-07-31 삼성전자주식회사 자동 빔 전류 제한 회로
RU2233044C2 (ru) * 2002-08-15 2004-07-20 Федеральное государственное унитарное предприятие "Московское орденов Октябрьской Революции и Трудового Красного Знамени конструкторское бюро "Электрон" - МКБ "Электрон" Устройство автоматического контрастирования телевизионного изображения
JP4313996B2 (ja) * 2002-08-30 2009-08-12 トヨタ自動車株式会社 撮像装置
KR100497395B1 (ko) * 2003-06-30 2005-06-23 삼성전자주식회사 화질을 자동으로 설정하는 방법
JP2005057621A (ja) * 2003-08-07 2005-03-03 Sanyo Electric Co Ltd 映像信号処理回路
JP4214480B2 (ja) * 2004-04-21 2009-01-28 ソニー株式会社 画像処理装置および方法、並びにプログラム
RU2296433C1 (ru) * 2005-07-29 2007-03-27 Федеральное государственное унитарное предприятие Научно-производственное объединение Автоматики им. акад. Н.А. Семихатова Способ автоматического увеличения контраста полутонового изображения преобразованием яркостной гистограммы
RU2311740C1 (ru) * 2006-03-15 2007-11-27 Федеральное Государственное Унитарное Предприятие "Государственный Рязанский Приборный Завод" Устройство для автоматической регулировки амплитуды видеосигнала
KR20080015626A (ko) * 2006-08-16 2008-02-20 삼성전자주식회사 영상처리장치 및 영상처리방법
CN100542235C (zh) * 2006-12-06 2009-09-16 晨星半导体股份有限公司 视频信号自动增益控制电路及方法
US8525934B2 (en) * 2008-01-30 2013-09-03 Sharp Kabushiki Kaisha Video display apparatus for adjusting the degree of amplification of the input image according to image characteristics
CN101923822A (zh) * 2009-06-17 2010-12-22 康佳集团股份有限公司 一种调节背光亮度的方法、系统及电视机
CN105303586B (zh) * 2014-07-16 2018-05-11 深圳Tcl新技术有限公司 获取直方图的方法、亮度动态调整的方法及图像处理装置

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56107674A (en) * 1980-01-31 1981-08-26 Sony Corp Gradation correcting device of video signal
US4599643A (en) * 1983-12-29 1986-07-08 Rca Corporation Apparatus responsive to plural color video signals for amplitude limiting the video signals to assist beam current limiting
JPS60177551U (ja) * 1984-04-28 1985-11-26 シャープ株式会社 テレビのコントラスト及び輝度調節装置
US4651210A (en) * 1984-12-24 1987-03-17 Rca Corporation Adjustable gamma controller
FR2575885B1 (fr) * 1985-01-04 1987-02-20 Thomson Csf Renforcateur de contraste pour images video
JPH071924B2 (ja) * 1986-12-22 1995-01-11 富士写真フイルム株式会社 映像信号エツジ強調処理装置
FR2616285B1 (fr) * 1987-06-05 1994-05-06 Thomson Semiconducteurs Dispositif de reglage des frequences minimale et maximale d'un signal video module en frequence
US4937671A (en) * 1988-12-28 1990-06-26 Zenith Electronics Corporation Digital video black expander
US4937670A (en) * 1989-01-31 1990-06-26 Rca Licensing Corporation Peak detector with feedback
US4947253A (en) * 1989-04-18 1990-08-07 Rca Licensing Corporation Brightness modulator for closed loop compensation of black level

Also Published As

Publication number Publication date
CN1049766A (zh) 1991-03-06
EP0414183A2 (fr) 1991-02-27
RU2100911C1 (ru) 1997-12-27
MY106733A (en) 1995-07-31
PT95105A (pt) 1992-03-31
SG72626A1 (en) 2000-05-23
FI904091A0 (fi) 1990-08-17
FI97513C (fi) 1996-12-27
EP0414183A3 (en) 1992-10-14
DE69029110D1 (de) 1996-12-19
JPH0391380A (ja) 1991-04-16
FI97513B (fi) 1996-09-13
KR910005675A (ko) 1991-03-30
PT95105B (pt) 1998-06-30
CA2021094C (fr) 2000-09-26
JPH0828850B2 (ja) 1996-03-21
CN1031091C (zh) 1996-02-21
EP0414183B1 (fr) 1996-11-13
TR26342A (tr) 1995-03-15
KR0169964B1 (ko) 1999-03-20
US5003394A (en) 1991-03-26
ATE145310T1 (de) 1996-11-15
DE69029110T2 (de) 1997-05-07
ES2096568T3 (es) 1997-03-16

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