DE69828855D1 - Schaltung zur detektion des schwarzwertpegels eines videosignals - Google Patents

Schaltung zur detektion des schwarzwertpegels eines videosignals

Info

Publication number
DE69828855D1
DE69828855D1 DE69828855T DE69828855T DE69828855D1 DE 69828855 D1 DE69828855 D1 DE 69828855D1 DE 69828855 T DE69828855 T DE 69828855T DE 69828855 T DE69828855 T DE 69828855T DE 69828855 D1 DE69828855 D1 DE 69828855D1
Authority
DE
Germany
Prior art keywords
detecting
circuit
video signal
black level
black
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
DE69828855T
Other languages
English (en)
Other versions
DE69828855T2 (de
Inventor
Masahiro Takeshima
Atsuhisa Kageyama
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 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 DE69828855D1 publication Critical patent/DE69828855D1/de
Application granted granted Critical
Publication of DE69828855T2 publication Critical patent/DE69828855T2/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
    • H04N17/00—Diagnosis, testing or measuring for television systems or their details
    • 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
    • H04N5/14—Picture signal circuitry for video frequency region
    • H04N5/16—Circuitry for reinsertion of dc and slowly varying components of signal; Circuitry for preservation of black or white level

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • General Health & Medical Sciences (AREA)
  • Picture Signal Circuits (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
DE69828855T 1997-03-03 1998-03-02 Schaltung zur detektion des schwarzwertpegels eines videosignals Expired - Lifetime DE69828855T2 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP4752097 1997-03-03
JP4752097 1997-03-03
PCT/JP1998/000852 WO1998039928A1 (en) 1997-03-03 1998-03-02 Black level detecting circuit of video signal

Publications (2)

Publication Number Publication Date
DE69828855D1 true DE69828855D1 (de) 2005-03-10
DE69828855T2 DE69828855T2 (de) 2005-06-30

Family

ID=12777399

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69828855T Expired - Lifetime DE69828855T2 (de) 1997-03-03 1998-03-02 Schaltung zur detektion des schwarzwertpegels eines videosignals

Country Status (9)

Country Link
US (1) US5920351A (de)
EP (1) EP0914747B1 (de)
JP (1) JP4063889B2 (de)
KR (1) KR100365847B1 (de)
CN (1) CN1144474C (de)
BR (1) BR9805923A (de)
CZ (1) CZ294402B6 (de)
DE (1) DE69828855T2 (de)
WO (1) WO1998039928A1 (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3669413B2 (ja) * 1999-05-17 2005-07-06 日本電気株式会社 画像表示用アダプタを備えた移動端末と回線品質変化対応方法
US6972866B1 (en) 2000-10-03 2005-12-06 Xerox Corporation Detecting process neutral colors
JP3844430B2 (ja) * 2001-06-26 2006-11-15 三菱電機株式会社 映像信号処理装置および映像信号処理方法
JP3722740B2 (ja) * 2001-11-05 2005-11-30 三菱電機株式会社 映像処理装置及び映像処理方法
FR2859344B1 (fr) * 2003-08-29 2006-01-27 St Microelectronics Sa Dispositif de generation d'un signal d'amelioration de la nettete d'une image video
JP4284538B2 (ja) * 2004-10-19 2009-06-24 ソニー株式会社 再生装置および再生方法
CN102365676B (zh) 2009-03-30 2014-04-30 Nec显示器解决方案株式会社 视频显示装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3976836A (en) * 1975-06-09 1976-08-24 Gte Sylvania Incorporated Automatic black level setting circuit
JPS6043981A (ja) * 1983-08-22 1985-03-08 Sony Corp ビ−ム電流制限回路
JPH0212427A (ja) * 1988-06-30 1990-01-17 Nec Corp テレビジョン信号の最小値検出回路
US5410222A (en) * 1993-08-31 1995-04-25 Thomson Consumer Electronics, Inc. Sample pulse generator for automatic kinescope bias system

Also Published As

Publication number Publication date
KR20000065192A (ko) 2000-11-06
EP0914747B1 (de) 2005-02-02
JP2000513902A (ja) 2000-10-17
KR100365847B1 (ko) 2003-02-20
JP4063889B2 (ja) 2008-03-19
CZ294402B6 (cs) 2004-12-15
WO1998039928A1 (en) 1998-09-11
CZ348398A3 (cs) 1999-02-17
DE69828855T2 (de) 2005-06-30
CN1144474C (zh) 2004-03-31
US5920351A (en) 1999-07-06
BR9805923A (pt) 1999-08-31
EP0914747A1 (de) 1999-05-12
CN1217855A (zh) 1999-05-26

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8320 Willingness to grant licences declared (paragraph 23)
8327 Change in the person/name/address of the patent owner

Owner name: PANASONIC CORP., KADOMA, OSAKA, JP