ES2096568T3 - Un sistema de video dinamico que incluye secciones de tratamiento del contraste automatico y de "extension del blanco". - Google Patents

Un sistema de video dinamico que incluye secciones de tratamiento del contraste automatico y de "extension del blanco".

Info

Publication number
ES2096568T3
ES2096568T3 ES90115908T ES90115908T ES2096568T3 ES 2096568 T3 ES2096568 T3 ES 2096568T3 ES 90115908 T ES90115908 T ES 90115908T ES 90115908 T ES90115908 T ES 90115908T ES 2096568 T3 ES2096568 T3 ES 2096568T3
Authority
ES
Spain
Prior art keywords
luminance
white
sections
automatic contrast
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.)
Expired - Lifetime
Application number
ES90115908T
Other languages
English (en)
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
Application granted granted Critical
Publication of ES2096568T3 publication Critical patent/ES2096568T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime 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)
  • Processing Of Color Television Signals (AREA)
  • Picture Signal Circuits (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)

Abstract

SE DESCRIBE UN SISTEMA DE TELEVISION, INCLUYENDO SECCIONES PARA LIMITAR IMPULSOS DE CRESTA DEL BLANCO A UN DISPOSITIVO DE PRESENTACION (POR EJEMPLO, DEL TIPO DE VISTA DIRECTA O DE PROYECCION), EN TANTO SE MANTIENEN RELATIVAMENTE ALTOS EL CONTRASTE SUBJETIVO DE IMAGENES Y EL BRILLO. ESPECIFICAMENTE, EL SISTEMA INCLUYE UNA SECCION DE CONTROL DE CONTRASTE AUTOMATICO (29, 31, 33, 9) PARA CONTROLAR LA AMPLITUD DE LA SEÑAL DE LUMINANCIA EN RESPUESTA AL VALOR PICO DE UNA SEÑAL DE COMPONENTE DE IMAGEN REPRESENTATIVA DE LUMINANCIA, PRECEDIDA POR UNA SECCION (5) DE CONTROL DE "COMPRESION DEL BLANCO", PARA DESTACAR LOS COMPONENTES DE LUMINANCIA DE ALCANCE MEDIO RESPECTO A LOS COMPONENTES DE LUMINANCIA DE GRAN ALCANCE, COMO UNA FUNCION DEL VALOR PROMEDIO (35) DEL COMPONENTE DE IMAGENES REPRESENTATIVAS DE LUMINANCIA. SIENDO ASI, PUEDEN REDUCIRSE LA FLORACION DE MANCHAS O PUNTOS Y LA SATURACION DE LA ETAPA EXCITADORA DE LA PANTALLA, EN TANTO SE PROPORCIONAN IMAGENES BRILLANTES, SUBJETIVAMENTE NITIDAS.
ES90115908T 1989-08-25 1990-08-20 Un sistema de video dinamico que incluye secciones de tratamiento del contraste automatico y de "extension del blanco". Expired - Lifetime ES2096568T3 (es)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
ES2096568T3 true ES2096568T3 (es) 1997-03-16

Family

ID=23577019

Family Applications (1)

Application Number Title Priority Date Filing Date
ES90115908T Expired - Lifetime ES2096568T3 (es) 1989-08-25 1990-08-20 Un sistema de video dinamico que incluye secciones de tratamiento del contraste automatico y de "extension del blanco".

Country Status (15)

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

Families Citing this family (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0437263A (ja) * 1990-05-31 1992-02-07 Matsushita Electric Ind Co Ltd 階調補正装置
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
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
US5245434A (en) * 1992-05-22 1993-09-14 Thomson Consumer Electronics, Inc. Autopix circuit with inserted vertical blanking
DE69319960T2 (de) * 1992-05-22 1998-12-10 Thomson Consumer Electronics, Inc., Indianapolis, Ind. Nichtlineare Video-Signalprozessor unter Verwendung von Bildelementanalyse
US5303056A (en) * 1992-09-14 1994-04-12 Eastman Kodak Company Dynamic gain correction for CRT printing
EP0589513B1 (en) * 1992-09-22 1998-12-02 Koninklijke Philips Electronics N.V. Picture signal processor
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
JP3661168B2 (ja) * 1999-11-25 2005-06-15 松下電器産業株式会社 階調補正装置、階調補正方法、及び映像表示装置
KR100393219B1 (ko) * 2001-03-13 2003-07-31 삼성전자주식회사 자동 빔 전류 제한 회로
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
KR20080015626A (ko) * 2006-08-16 2008-02-20 삼성전자주식회사 영상처리장치 및 영상처리방법
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、***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
DE69029110T2 (de) 1997-05-07
DE69029110D1 (de) 1996-12-19
SG72626A1 (en) 2000-05-23
US5003394A (en) 1991-03-26
ATE145310T1 (de) 1996-11-15
CN1031091C (zh) 1996-02-21
JPH0391380A (ja) 1991-04-16
FI97513C (fi) 1996-12-27
RU2100911C1 (ru) 1997-12-27
KR910005675A (ko) 1991-03-30
KR0169964B1 (ko) 1999-03-20
CA2021094A1 (en) 1991-02-26
CN1049766A (zh) 1991-03-06
FI97513B (fi) 1996-09-13
JPH0828850B2 (ja) 1996-03-21
MY106733A (en) 1995-07-31
EP0414183B1 (en) 1996-11-13
EP0414183A3 (en) 1992-10-14
CA2021094C (en) 2000-09-26
FI904091A0 (fi) 1990-08-17
PT95105A (pt) 1992-03-31
TR26342A (tr) 1995-03-15
EP0414183A2 (en) 1991-02-27
PT95105B (pt) 1998-06-30

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