JP4420385B2 - 動的コントラスト改善方法 - Google Patents

動的コントラスト改善方法 Download PDF

Info

Publication number
JP4420385B2
JP4420385B2 JP2003541261A JP2003541261A JP4420385B2 JP 4420385 B2 JP4420385 B2 JP 4420385B2 JP 2003541261 A JP2003541261 A JP 2003541261A JP 2003541261 A JP2003541261 A JP 2003541261A JP 4420385 B2 JP4420385 B2 JP 4420385B2
Authority
JP
Japan
Prior art keywords
video frame
analysis
dynamic contrast
transfer function
period
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
JP2003541261A
Other languages
English (en)
Japanese (ja)
Other versions
JP2005509340A5 (https=
JP2005509340A (ja
Inventor
デイーン フイリマン，ポール
エドワード ホーランダー，トーマス
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.)
Thomson Licensing SAS
Original Assignee
Thomson Licensing SAS
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 Licensing SAS filed Critical Thomson Licensing SAS
Publication of JP2005509340A publication Critical patent/JP2005509340A/ja
Publication of JP2005509340A5 publication Critical patent/JP2005509340A5/ja
Application granted granted Critical
Publication of JP4420385B2 publication Critical patent/JP4420385B2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/431—Generation of visual interfaces for content selection or interaction; Content or additional data rendering
    • H04N21/4318—Generation of visual interfaces for content selection or interaction; Content or additional data rendering by altering the content in the rendering process, e.g. blanking, blurring or masking an image region
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
    • H04N21/44008—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving operations for analysing video streams, e.g. detecting features or characteristics in the video stream
    • 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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/066—Adjustment of display parameters for control of contrast

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Picture Signal Circuits (AREA)
  • Television Receiver Circuits (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
JP2003541261A 2001-11-01 2002-10-28 動的コントラスト改善方法 Expired - Lifetime JP4420385B2 (ja)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US33763401P 2001-11-01 2001-11-01
PCT/US2002/034414 WO2003039137A1 (en) 2001-11-01 2002-10-28 Method for dynamic contrast improvement

Publications (3)

Publication Number Publication Date
JP2005509340A JP2005509340A (ja) 2005-04-07
JP2005509340A5 JP2005509340A5 (https=) 2006-01-05
JP4420385B2 true JP4420385B2 (ja) 2010-02-24

Family

ID=23321343

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2003541261A Expired - Lifetime JP4420385B2 (ja) 2001-11-01 2002-10-28 動的コントラスト改善方法

Country Status (7)

Country Link
US (1) US7064794B2 (https=)
EP (1) EP1446944A4 (https=)
JP (1) JP4420385B2 (https=)
KR (1) KR20050040849A (https=)
CN (1) CN100382568C (https=)
MX (1) MXPA04004197A (https=)
WO (1) WO2003039137A1 (https=)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040255338A1 (en) * 2003-06-13 2004-12-16 Apple Computer, Inc. Interface for sending synchronized audio and video data
US7668099B2 (en) * 2003-06-13 2010-02-23 Apple Inc. Synthesis of vertical blanking signal
TWI234398B (en) * 2003-11-20 2005-06-11 Sunplus Technology Co Ltd Automatic contrast limiting circuit by spatial domain infinite impulse response filter and method thereof
US8922594B2 (en) 2005-06-15 2014-12-30 Sharp Laboratories Of America, Inc. Methods and systems for enhancing display characteristics with high frequency contrast enhancement
US9083969B2 (en) 2005-08-12 2015-07-14 Sharp Laboratories Of America, Inc. Methods and systems for independent view adjustment in multiple-view displays
US8947465B2 (en) 2004-12-02 2015-02-03 Sharp Laboratories Of America, Inc. Methods and systems for display-mode-dependent brightness preservation
US7515160B2 (en) 2006-07-28 2009-04-07 Sharp Laboratories Of America, Inc. Systems and methods for color preservation with image tone scale corrections
US8913089B2 (en) 2005-06-15 2014-12-16 Sharp Laboratories Of America, Inc. Methods and systems for enhancing display characteristics with frequency-specific gain
US7605872B2 (en) * 2005-06-20 2009-10-20 Mediatek Inc. Video contrast adjusting method and system
CN100407765C (zh) * 2005-09-07 2008-07-30 逐点半导体（上海）有限公司 图像对比度增强装置及增强方法
SG138579A1 (en) * 2006-06-26 2008-01-28 Genesis Microchip Inc Universal, highly configurable video and graphic measurement device
US7881547B2 (en) 2006-07-28 2011-02-01 Genesis Microchip Inc. Video window detector
US9330630B2 (en) 2008-08-30 2016-05-03 Sharp Laboratories Of America, Inc. Methods and systems for display source light management with rate change control
US8284232B2 (en) * 2009-01-30 2012-10-09 Hewlett-Packard Development Company, L.P. Equalization of video streams
KR101120700B1 (ko) * 2010-09-02 2012-03-29 삼성메디슨 주식회사 컬러 도플러 모드 영상을 제공하는 초음파 시스템 및 방법
US9338389B2 (en) 2011-10-20 2016-05-10 Dolby Laboratories Licensing Corporation Method and system for video equalization

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2575885B1 (fr) 1985-01-04 1987-02-20 Thomson Csf Renforcateur de contraste pour images video
US4628362A (en) * 1985-05-02 1986-12-09 American Dynamics Corporation Combined video AGC and digitizing circuit
JP2521183Y2 (ja) 1987-09-29 1996-12-25 ソニー株式会社 ディジタル信号処理回路
US4829381A (en) * 1988-04-18 1989-05-09 Polaroid Corporation System and method for electronic image enhancement by dynamic pixel transformation
US5099330A (en) 1988-10-28 1992-03-24 Casio Computer Co., Ltd. Contrast control based on mean and deviation values
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
SG63564A1 (en) 1992-05-22 1999-03-30 Thomson Consumer Electronics Non-linear video signal processor employing picture element analysis
EP0613294B1 (en) 1993-02-24 1998-10-28 Matsushita Electric Industrial Co., Ltd. Gradation correction device and image sensing device therewith
US5550556A (en) 1993-11-01 1996-08-27 Multivideo Labs, Inc. Transmitting data and commands to display monitors
US5777590A (en) 1995-08-25 1998-07-07 S3, Incorporated Grayscale shading for liquid crystal display panels
JP3130266B2 (ja) 1996-03-09 2001-01-31 三星電子株式会社 平均分離ヒストグラム等化を用いる映像改善方法及びその回路
JP2951910B2 (ja) 1997-03-18 1999-09-20 松下電器産業株式会社 撮像装置の階調補正装置及び階調補正方法
US6075574A (en) * 1998-05-22 2000-06-13 Ati Technologies, Inc Method and apparatus for controlling contrast of images
EP0963112B1 (en) 1998-06-02 2004-04-21 Deutsche Thomson-Brandt Gmbh Method and apparatus for dynamic contrast improvement in video pictures
EP0963111A1 (en) * 1998-06-02 1999-12-08 Deutsche Thomson-Brandt Gmbh Method and apparatus for dynamic contrast improvement in video pictures

Also Published As

Publication number Publication date
EP1446944A4 (en) 2005-01-12
CN100382568C (zh) 2008-04-16
CN1575586A (zh) 2005-02-02
US7064794B2 (en) 2006-06-20
EP1446944A1 (en) 2004-08-18
KR20050040849A (ko) 2005-05-03
MXPA04004197A (es) 2004-09-06
WO2003039137A1 (en) 2003-05-08
JP2005509340A (ja) 2005-04-07
US20040207760A1 (en) 2004-10-21

Similar Documents

Publication Publication Date Title
JP4420385B2 (ja) 動的コントラスト改善方法
EP0454355A2 (en) Image signal processing apparatus for edge enhancement
EP1848209A2 (en) Apparatus and method for adjusting image
JP2003345315A (ja) 信号処理部及び液晶表示装置
EP0178844A1 (en) Television receivers
JP4387220B2 (ja) 映像表示方法及びその装置
JP3192407B2 (ja) 画像表示方法及びその装置
KR100510144B1 (ko) 디스플레이 기기의 번인으로 인한 화질차이를 보상하는방법 및 그 장치
JP2010154132A (ja) ガンマ補正回路およびガンマ補正方法
JP2000125225A (ja) 輝度補正装置
JP4379029B2 (ja) 画像処理装置、画像処理方法および画像投射装置
US6943848B2 (en) Unit for and method of video signal enhancement and image display apparatus provided with such a video signal enhancement unit
JPH0690382A (ja) 階調補正装置
JP2910883B2 (ja) 映像信号処理装置
EP1708489A1 (en) Image-quality adjusting apparatus, image-quality adjusting method, and display apparatus
KR100708376B1 (ko) Ｈｓｉ 칼라변환과 영상 히스토그램을 이용한 화질 개선장치 및 방법
KR20060003664A (ko) 디지털 신호 처리를 이용한 감마 자동 보정 장치 및 방법
JPH06350873A (ja) テレビジョン受像機
JP3214517B2 (ja) ガンマ補正回路
KR100826199B1 (ko) 대역별 영상 밝기 보정 방법 및 그 영상 표시 장치
JP2024078340A (ja) 信号処理装置
KR20050002218A (ko) 디스플레이 기기의 번인(Ｂｕｒ ｉｎ-ｉｎ)으로 인한화질차이를 감소시키는 방법 및 그 장치
KR100486196B1 (ko) 자동킨바이어스기준신호의잔상을제거한텔레비젼시스템및그의잔상제거방법
JP2010016640A (ja) 画像処理装置
JP2003101814A (ja) 階調変換方法、階調変換装置、及び画像表示装置

Legal Events

Date Code Title Description
A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20051018

A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20051018

RD03 Notification of appointment of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7423

Effective date: 20060929

RD04 Notification of resignation of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7424

Effective date: 20061120

RD05 Notification of revocation of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7425

Effective date: 20080318

RD04 Notification of resignation of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7424

Effective date: 20080415

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20081020

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20081125

A601 Written request for extension of time

Free format text: JAPANESE INTERMEDIATE CODE: A601

Effective date: 20090218

A602 Written permission of extension of time

Free format text: JAPANESE INTERMEDIATE CODE: A602

Effective date: 20090225

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20090522

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20091125

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20091127

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20121211

Year of fee payment: 3

R150 Certificate of patent or registration of utility model

Ref document number: 4420385

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20121211

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20131211

Year of fee payment: 4

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

S111 Request for change of ownership or part of ownership

Free format text: JAPANESE INTERMEDIATE CODE: R313113

S531 Written request for registration of change of domicile

Free format text: JAPANESE INTERMEDIATE CODE: R313531

R371 Transfer withdrawn

Free format text: JAPANESE INTERMEDIATE CODE: R371

R371 Transfer withdrawn

Free format text: JAPANESE INTERMEDIATE CODE: R371

S531 Written request for registration of change of domicile

Free format text: JAPANESE INTERMEDIATE CODE: R313531

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

S111 Request for change of ownership or part of ownership

Free format text: JAPANESE INTERMEDIATE CODE: R313113

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

EXPY Cancellation because of completion of term