FR2274138A1 - Elimination of interference caused by brightness variations of scan - monitors in stantaneous intensity of spot to produce proportional control signal - Google Patents

Elimination of interference caused by brightness variations of scan - monitors in stantaneous intensity of spot to produce proportional control signal

Info

Publication number
FR2274138A1
FR2274138A1 FR7517467A FR7517467A FR2274138A1 FR 2274138 A1 FR2274138 A1 FR 2274138A1 FR 7517467 A FR7517467 A FR 7517467A FR 7517467 A FR7517467 A FR 7517467A FR 2274138 A1 FR2274138 A1 FR 2274138A1
Authority
FR
France
Prior art keywords
spot
intensity
stantaneous
elimination
monitors
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.)
Granted
Application number
FR7517467A
Other languages
French (fr)
Other versions
FR2274138B1 (en
Inventor
John David Millward
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.)
Rank Organization Ltd
Original Assignee
Rank Organization 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 Rank Organization Ltd filed Critical Rank Organization Ltd
Publication of FR2274138A1 publication Critical patent/FR2274138A1/en
Application granted granted Critical
Publication of FR2274138B1 publication Critical patent/FR2274138B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/11—Scanning of colour motion picture films, e.g. for telecine
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/222—Studio circuitry; Studio devices; Studio equipment
    • H04N5/257—Picture signal generators using flying-spot scanners

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Color Television Image Signal Generators (AREA)
  • Video Image Reproduction Devices For Color Tv Systems (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)

Abstract

Circuit for eliminating the interference signals caused by variations in brightness of a scanning spot. The spot is derived from a cathode ray tube (1) of a television black and white or colour transmission camera. The film (3) is scanned by the spot which generates video signals (22). The circuit contains an element (4) that is sensitive to the instantaneous intensity of the spot and produces a signal, which is a function of intensity. this is fed to a control circuit (6) which is used to regulate the intensity of the cathode ray tube or the amplification factor of the video amplifier.
FR7517467A 1974-06-05 1975-06-04 Elimination of interference caused by brightness variations of scan - monitors in stantaneous intensity of spot to produce proportional control signal Granted FR2274138A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2488374 1974-06-05

Publications (2)

Publication Number Publication Date
FR2274138A1 true FR2274138A1 (en) 1976-01-02
FR2274138B1 FR2274138B1 (en) 1979-03-23

Family

ID=10218761

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7517467A Granted FR2274138A1 (en) 1974-06-05 1975-06-04 Elimination of interference caused by brightness variations of scan - monitors in stantaneous intensity of spot to produce proportional control signal

Country Status (4)

Country Link
JP (1) JPS516423A (en)
DE (1) DE2525073A1 (en)
FR (1) FR2274138A1 (en)
NL (1) NL7506633A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2389291A1 (en) * 1977-04-27 1978-11-24 Rank Organisation Ltd SCANNING DEVICE INCLUDING A CATHODIC RAY TUBE
FR2494906A1 (en) * 1980-11-25 1982-05-28 Thomson Csf ELECTRON MULTIPLICATION PHOTODETECTOR TUBE FOR USE IN A COLOR VIDEO READER

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2294376B (en) * 1994-10-18 1999-02-10 Rank Cintel Ltd Method and apparatus for correcting noise in a film scanner
GB2314988B (en) * 1996-07-03 2000-03-29 Cintel Int Ltd Film scanner correction
GB9714870D0 (en) 1997-07-15 1997-09-17 Innovation Tk Limited Telecine systems
GB2352902A (en) * 1999-07-30 2001-02-07 Cintel Internat Ltd Film scanner correction.

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2389291A1 (en) * 1977-04-27 1978-11-24 Rank Organisation Ltd SCANNING DEVICE INCLUDING A CATHODIC RAY TUBE
FR2494906A1 (en) * 1980-11-25 1982-05-28 Thomson Csf ELECTRON MULTIPLICATION PHOTODETECTOR TUBE FOR USE IN A COLOR VIDEO READER
EP0053530A1 (en) * 1980-11-25 1982-06-09 Thomson-Csf Electron multiplying photodetector tube for use in a colour video pick-up

Also Published As

Publication number Publication date
NL7506633A (en) 1975-12-09
DE2525073A1 (en) 1975-12-18
FR2274138B1 (en) 1979-03-23
JPS516423A (en) 1976-01-20

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Legal Events

Date Code Title Description
ST Notification of lapse