ATE137902T1 - Verfahren und schaltungsanordnung zur konstanthaltung des schwarzwertpegels nach der analog/digitalwandlung eines videosignals - Google Patents

Verfahren und schaltungsanordnung zur konstanthaltung des schwarzwertpegels nach der analog/digitalwandlung eines videosignals

Info

Publication number
ATE137902T1
ATE137902T1 AT91918848T AT91918848T ATE137902T1 AT E137902 T1 ATE137902 T1 AT E137902T1 AT 91918848 T AT91918848 T AT 91918848T AT 91918848 T AT91918848 T AT 91918848T AT E137902 T1 ATE137902 T1 AT E137902T1
Authority
AT
Austria
Prior art keywords
signal
video signal
black level
analog
maintaining
Prior art date
Application number
AT91918848T
Other languages
English (en)
Inventor
C K P Clarke
Original Assignee
British Broadcasting Corp
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 British Broadcasting Corp filed Critical British Broadcasting Corp
Application granted granted Critical
Publication of ATE137902T1 publication Critical patent/ATE137902T1/de

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
    • H04N5/16—Circuitry for reinsertion of DC and slowly varying components of signal; Circuitry for preservation of black or white level
    • H04N5/18—Circuitry for reinsertion of DC and slowly varying components of signal; Circuitry for preservation of black or white level by means of "clamp" circuit operated by switching circuit
    • H04N5/185—Circuitry for reinsertion of DC and slowly varying components of signal; Circuitry for preservation of black or white level by means of "clamp" circuit operated by switching circuit for the black level

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Picture Signal Circuits (AREA)
  • Processing Of Color Television Signals (AREA)
  • Closed-Circuit Television Systems (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Steroid Compounds (AREA)
  • Detection And Correction Of Errors (AREA)
AT91918848T 1990-10-25 1991-10-25 Verfahren und schaltungsanordnung zur konstanthaltung des schwarzwertpegels nach der analog/digitalwandlung eines videosignals ATE137902T1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9023305A GB2249236B (en) 1990-10-25 1990-10-25 Improved clamping technique for television

Publications (1)

Publication Number Publication Date
ATE137902T1 true ATE137902T1 (de) 1996-05-15

Family

ID=10684384

Family Applications (1)

Application Number Title Priority Date Filing Date
AT91918848T ATE137902T1 (de) 1990-10-25 1991-10-25 Verfahren und schaltungsanordnung zur konstanthaltung des schwarzwertpegels nach der analog/digitalwandlung eines videosignals

Country Status (8)

Country Link
EP (1) EP0554321B1 (de)
JP (1) JPH06502283A (de)
AT (1) ATE137902T1 (de)
AU (1) AU645624B2 (de)
DE (1) DE69119428T2 (de)
FI (1) FI931852A0 (de)
GB (1) GB2249236B (de)
WO (1) WO1992008315A1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR0108917Y1 (en) * 1991-12-05 1997-11-08 Samsung Electronics Co Ltd Digital clamping circuit
JPH066809A (ja) * 1992-06-16 1994-01-14 Toshiba Corp 画像信号処理装置
DE10009431C1 (de) * 2000-02-28 2001-06-07 Lear Automotive Electronics Gm Verfahren zur Kompensation von Gleichspannungsschwankungen auf Videosignalen
GB2446844B (en) 2006-12-05 2011-05-25 Wolfson Microelectronics Plc Callibration circuit and asociated method

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2628662C3 (de) * 1976-06-25 1980-03-06 Robert Bosch Gmbh, 7000 Stuttgart System zur Korrektur der digitalen Wertigkeit von Signalen
DE2737431C3 (de) * 1977-08-19 1980-11-06 Robert Bosch Gmbh, 7000 Stuttgart Verfahren zur digitalen Klemmung pulscodemodulierter Videosignale

Also Published As

Publication number Publication date
WO1992008315A1 (en) 1992-05-14
DE69119428D1 (de) 1996-06-13
AU8751291A (en) 1992-05-26
AU645624B2 (en) 1994-01-20
GB2249236B (en) 1994-10-12
GB9023305D0 (en) 1990-12-05
FI931852A7 (fi) 1993-04-23
JPH06502283A (ja) 1994-03-10
DE69119428T2 (de) 1997-01-02
EP0554321B1 (de) 1996-05-08
FI931852L (fi) 1993-04-23
FI931852A0 (fi) 1993-04-23
EP0554321A1 (de) 1993-08-11
GB2249236A (en) 1992-04-29

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Legal Events

Date Code Title Description
RER Ceased as to paragraph 5 lit. 3 law introducing patent treaties