DE3278874D1 - Clamping video signals - Google Patents

Clamping video signals

Info

Publication number
DE3278874D1
DE3278874D1 DE8282201101T DE3278874T DE3278874D1 DE 3278874 D1 DE3278874 D1 DE 3278874D1 DE 8282201101 T DE8282201101 T DE 8282201101T DE 3278874 T DE3278874 T DE 3278874T DE 3278874 D1 DE3278874 D1 DE 3278874D1
Authority
DE
Germany
Prior art keywords
video signals
clamping video
clamping
signals
video
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
Application number
DE8282201101T
Other languages
English (en)
Inventor
Thomas Colin Mackereth
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.)
Philips Electronics UK Ltd
Koninklijke Philips NV
Original Assignee
Philips Electronic and Associated Industries Ltd
Philips Gloeilampenfabrieken 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 Philips Electronic and Associated Industries Ltd, Philips Gloeilampenfabrieken NV filed Critical Philips Electronic and Associated Industries Ltd
Application granted granted Critical
Publication of DE3278874D1 publication Critical patent/DE3278874D1/de
Expired 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
    • H04N5/16—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)
  • Analogue/Digital Conversion (AREA)
  • Television Signal Processing For Recording (AREA)
DE8282201101T 1981-09-11 1982-09-07 Clamping video signals Expired DE3278874D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08127538A GB2105547A (en) 1981-09-11 1981-09-11 Clamping video signals

Publications (1)

Publication Number Publication Date
DE3278874D1 true DE3278874D1 (en) 1988-09-08

Family

ID=10524453

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8282201101T Expired DE3278874D1 (en) 1981-09-11 1982-09-07 Clamping video signals

Country Status (6)

Country Link
US (1) US4473846A (de)
EP (1) EP0074683B1 (de)
JP (1) JPS5854785A (de)
CA (1) CA1184289A (de)
DE (1) DE3278874D1 (de)
GB (1) GB2105547A (de)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2524748A1 (fr) * 1982-04-02 1983-10-07 Thomson Csf Circuit numerique d'alignement de niveau d'un signal analogique
JPS60113586A (ja) * 1983-11-24 1985-06-20 Nec Corp クランプ装置
DE3673255D1 (de) * 1985-05-21 1990-09-13 Citizen Watch Co Ltd Automatische austastpegel-klemmschaltung.
ES2039353T3 (es) * 1985-10-21 1993-10-01 Rank Cintel Limited Circuito de sujecion para un convertidor analogico-numerico.
US4859871A (en) * 1987-02-13 1989-08-22 Fujitsu Limited Voltage level setting circuit
JPS63267064A (ja) * 1987-04-24 1988-11-04 Hitachi Ltd クランプ回路
EP0360918A1 (de) * 1988-09-30 1990-04-04 Computer Gesellschaft Konstanz Mbh Schaltungsanordnung zur Klemmung von in einer Videosignalfolge enthaltenen Schwarzwert-Referenz-signale
EP0396746B1 (de) * 1988-11-17 1995-04-05 Matsushita Electric Industrial Co., Ltd. Bildempfängersteuerung
US5278653A (en) * 1989-11-15 1994-01-11 Rank Cintel Limited Methods and apparatus for digital correction of afterglow in flying spot scanners
US5105276A (en) * 1990-11-15 1992-04-14 Eastman Kodak Company DC restoration of sampled imagery signals
GB2446844B (en) * 2006-12-05 2011-05-25 Wolfson Microelectronics Plc Callibration circuit and asociated method

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3736370A (en) * 1971-01-18 1973-05-29 Gen Electric Improved chroma clamping circuit
CA1089981A (en) * 1977-06-29 1980-11-18 Takao Tsuchiya Clamping circuit for color television signals
US4178610A (en) * 1978-02-17 1979-12-11 Gte Sylvania Incorporated Clamp circuit for RGB output stages
US4261015A (en) * 1979-07-09 1981-04-07 Burroughs Corporation Video clamp
JPS5767380A (en) * 1980-10-15 1982-04-23 Alps Electric Co Ltd Video clamping circuit

Also Published As

Publication number Publication date
EP0074683A2 (de) 1983-03-23
EP0074683B1 (de) 1988-08-03
JPS5854785A (ja) 1983-03-31
EP0074683A3 (en) 1985-11-27
GB2105547A (en) 1983-03-23
US4473846A (en) 1984-09-25
CA1184289A (en) 1985-03-19

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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