DE69418964T2 - Bildsignalverbesserungsschaltung - Google Patents

Bildsignalverbesserungsschaltung

Info

Publication number
DE69418964T2
DE69418964T2 DE69418964T DE69418964T DE69418964T2 DE 69418964 T2 DE69418964 T2 DE 69418964T2 DE 69418964 T DE69418964 T DE 69418964T DE 69418964 T DE69418964 T DE 69418964T DE 69418964 T2 DE69418964 T2 DE 69418964T2
Authority
DE
Germany
Prior art keywords
image signal
improvement circuit
signal improvement
circuit
image
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
DE69418964T
Other languages
English (en)
Other versions
DE69418964D1 (de
Inventor
Cornelis Antoine Maria Jaspers
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.)
Entropic Communications LLC
Original Assignee
Koninklijke Philips Electronics NV
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 Koninklijke Philips Electronics NV filed Critical Koninklijke Philips Electronics NV
Application granted granted Critical
Publication of DE69418964D1 publication Critical patent/DE69418964D1/de
Publication of DE69418964T2 publication Critical patent/DE69418964T2/de
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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T1/00—General purpose image data processing
    • 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)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Picture Signal Circuits (AREA)
  • Image Processing (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
DE69418964T 1993-10-08 1994-10-03 Bildsignalverbesserungsschaltung Expired - Lifetime DE69418964T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE9301060A BE1007608A3 (nl) 1993-10-08 1993-10-08 Beeldsignaalverbeteringsschakeling.

Publications (2)

Publication Number Publication Date
DE69418964D1 DE69418964D1 (de) 1999-07-15
DE69418964T2 true DE69418964T2 (de) 1999-12-16

Family

ID=3887403

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69418964T Expired - Lifetime DE69418964T2 (de) 1993-10-08 1994-10-03 Bildsignalverbesserungsschaltung

Country Status (6)

Country Link
US (1) US5734746A (de)
EP (1) EP0648043B1 (de)
JP (1) JP3824667B2 (de)
KR (1) KR100350561B1 (de)
BE (1) BE1007608A3 (de)
DE (1) DE69418964T2 (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
FI104521B (fi) * 1997-01-30 2000-02-15 Nokia Multimedia Network Termi Menetelmä kuvasekvenssien kontrastin parantamiseksi
WO1999004562A1 (en) * 1997-07-14 1999-01-28 LEMLEY, Michael, S. Ambient light-dependent video-signal processing
EP1075140A1 (de) 1999-08-02 2001-02-07 Koninklijke Philips Electronics N.V. Verbesserung eines Videosignals
AU2003270386A1 (en) * 2002-09-06 2004-03-29 Rytec Corporation Signal intensity range transformation apparatus and method
KR101097512B1 (ko) * 2004-11-23 2011-12-22 엘지디스플레이 주식회사 액정표시장치 및 구동방법
US20070154089A1 (en) * 2006-01-03 2007-07-05 Chang-Jung Kao Method and apparatus for calculating image histogram with configurable granularity

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3979555A (en) * 1975-05-27 1976-09-07 Hughes Aircraft Company Histogram equalization system for display improvement
FR2456448A1 (fr) * 1979-05-11 1980-12-05 Thomson Csf Dispositif de commande automatique de la fonction de transfert d'un systeme de transmission videofrequence en vue d'ameliorer la perception des images
US4516167A (en) * 1982-11-30 1985-05-07 Rca Corporation Compression of the dynamic range of video signals
DE68926702T2 (de) * 1988-09-08 1996-12-19 Sony Corp Bildverarbeitungsgerät
US5089890A (en) * 1989-02-06 1992-02-18 Canon Kabushiki Kaisha Gamma correction device
JPH04183177A (ja) * 1990-11-19 1992-06-30 Matsushita Electric Ind Co Ltd 累積ヒストグラム回路および補間回路および画質補正回路
JPH04271669A (ja) * 1991-02-27 1992-09-28 Matsushita Electric Ind Co Ltd 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
DE69227492T2 (de) * 1991-08-30 1999-04-08 Matsushita Electric Ind Co Ltd Bildverarbeitungsgerät
JPH0566751A (ja) * 1991-09-10 1993-03-19 Matsushita Electric Ind Co Ltd 階調補正回路
JPH05176263A (ja) * 1991-12-20 1993-07-13 Matsushita Electric Ind Co Ltd 階調補正装置
JP2934360B2 (ja) * 1993-02-12 1999-08-16 三菱電機株式会社 映像信号処理装置

Also Published As

Publication number Publication date
EP0648043B1 (de) 1999-06-09
JP3824667B2 (ja) 2006-09-20
BE1007608A3 (nl) 1995-08-22
JPH07177387A (ja) 1995-07-14
DE69418964D1 (de) 1999-07-15
KR950012268A (ko) 1995-05-16
KR100350561B1 (ko) 2002-12-11
US5734746A (en) 1998-03-31
EP0648043A1 (de) 1995-04-12

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Legal Events

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8320 Willingness to grant licences declared (paragraph 23)
8328 Change in the person/name/address of the agent

Representative=s name: VOLMER, G., DIPL.-ING., PAT.-ANW., 52066 AACHEN

8328 Change in the person/name/address of the agent

Representative=s name: EISENFUEHR, SPEISER & PARTNER, 10178 BERLIN

8327 Change in the person/name/address of the patent owner

Owner name: NXP B.V., EINDHOVEN, NL

8327 Change in the person/name/address of the patent owner

Owner name: TRIDENT MICROSYSTEMS (FAR EAST) LTD., GRAND CA, KY

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