DE69031199D1 - Aufrechterhaltung von Videosignalen - Google Patents

Aufrechterhaltung von Videosignalen

Info

Publication number
DE69031199D1
DE69031199D1 DE69031199T DE69031199T DE69031199D1 DE 69031199 D1 DE69031199 D1 DE 69031199D1 DE 69031199 T DE69031199 T DE 69031199T DE 69031199 T DE69031199 T DE 69031199T DE 69031199 D1 DE69031199 D1 DE 69031199D1
Authority
DE
Germany
Prior art keywords
maintenance
video signals
video
signals
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 - Fee Related
Application number
DE69031199T
Other languages
English (en)
Other versions
DE69031199T2 (de
Inventor
Timothy Ian Paterson Trew
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.)
Koninklijke Philips NV
Original Assignee
Koninklijke Philips Electronics NV
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
Priority claimed from GB8919340A external-priority patent/GB2235602A/en
Priority claimed from GB909006325A external-priority patent/GB9006325D0/en
Application filed by Koninklijke Philips Electronics NV, Philips Electronics NV filed Critical Koninklijke Philips Electronics NV
Publication of DE69031199D1 publication Critical patent/DE69031199D1/de
Application granted granted Critical
Publication of DE69031199T2 publication Critical patent/DE69031199T2/de
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
    • H04N5/202—Gamma control
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/015—High-definition television systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/015—High-definition television systems
    • H04N7/0152—High-definition television systems using spatial or temporal subsampling
    • H04N7/0155—High-definition television systems using spatial or temporal subsampling using pixel blocks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/64—Circuits for processing colour signals
    • H04N9/68—Circuits for processing colour signals for controlling the amplitude of colour signals, e.g. automatic chroma control circuits
    • H04N9/69—Circuits for processing colour signals for controlling the amplitude of colour signals, e.g. automatic chroma control circuits for modifying the colour signals by gamma correction

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Color Television Systems (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)
  • Picture Signal Circuits (AREA)
  • Television Systems (AREA)
DE69031199T 1989-08-25 1990-08-22 Aufrechterhaltung von Videosignalen Expired - Fee Related DE69031199T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8919340A GB2235602A (en) 1989-08-25 1989-08-25 Maintaining the mean values of the luminance and/or saturation of video signals
GB909006325A GB9006325D0 (en) 1990-03-21 1990-03-21 Maintaining video signals

Publications (2)

Publication Number Publication Date
DE69031199D1 true DE69031199D1 (de) 1997-09-11
DE69031199T2 DE69031199T2 (de) 1998-02-12

Family

ID=26295815

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69031199T Expired - Fee Related DE69031199T2 (de) 1989-08-25 1990-08-22 Aufrechterhaltung von Videosignalen

Country Status (5)

Country Link
US (1) US5166790A (de)
EP (1) EP0414327B1 (de)
JP (1) JPH03102993A (de)
KR (1) KR910005684A (de)
DE (1) DE69031199T2 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7873224B2 (en) * 2006-03-01 2011-01-18 Qualcomm Incorporated Enhanced image/video quality through artifact evaluation

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7808609A (nl) * 1978-08-21 1980-02-25 Philips Nv Gammacorrectieschakeling voor een videosignaal.
US4942466A (en) * 1985-12-24 1990-07-17 British Broadcasting Corporation Bandwidth compression for television signals
FR2613165B1 (fr) * 1987-03-24 1989-06-23 Labo Electronique Physique Systeme de transmission d'images de television a haute definition par un canal a bande passante etroite
FR2613166B1 (fr) * 1987-03-24 1989-06-23 Labo Electronique Physique Dispositif de transmission d'images a haute definition par un canal a bande passante relativement etroite
US4774562A (en) * 1987-06-02 1988-09-27 Eastman Kodak Company Image transmission system with preview mode
GB8729878D0 (en) * 1987-12-22 1988-02-03 Philips Electronic Associated Processing sub-sampled signals

Also Published As

Publication number Publication date
EP0414327B1 (de) 1997-08-06
EP0414327A3 (en) 1992-07-15
EP0414327A2 (de) 1991-02-27
DE69031199T2 (de) 1998-02-12
KR910005684A (ko) 1991-03-30
JPH03102993A (ja) 1991-04-30
US5166790A (en) 1992-11-24

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee