FR2486746B1 - - Google Patents

Info

Publication number
FR2486746B1
FR2486746B1 FR8015504A FR8015504A FR2486746B1 FR 2486746 B1 FR2486746 B1 FR 2486746B1 FR 8015504 A FR8015504 A FR 8015504A FR 8015504 A FR8015504 A FR 8015504A FR 2486746 B1 FR2486746 B1 FR 2486746B1
Authority
FR
France
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
FR8015504A
Other languages
French (fr)
Other versions
FR2486746A1 (fr
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.)
Telediffusion de France ets Public de Diffusion
Original Assignee
Telediffusion de France ets Public de Diffusion
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 Telediffusion de France ets Public de Diffusion filed Critical Telediffusion de France ets Public de Diffusion
Priority to FR8015504A priority Critical patent/FR2486746A1/fr
Publication of FR2486746A1 publication Critical patent/FR2486746A1/fr
Application granted granted Critical
Publication of FR2486746B1 publication Critical patent/FR2486746B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
    • H04N3/10—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical
    • H04N3/30—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical otherwise than with constant velocity or otherwise than in pattern formed by unidirectional, straight, substantially horizontal or vertical lines
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/167—Systems rendering the television signal unintelligible and subsequently intelligible
    • H04N7/169—Systems operating in the time domain of the television signal
    • H04N7/1696—Systems operating in the time domain of the television signal by changing or reversing the order of active picture signal portions

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Television Systems (AREA)
FR8015504A 1980-07-11 1980-07-11 Procede de brouillage et de debrouillage d'images de television Granted FR2486746A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8015504A FR2486746A1 (fr) 1980-07-11 1980-07-11 Procede de brouillage et de debrouillage d'images de television

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8015504A FR2486746A1 (fr) 1980-07-11 1980-07-11 Procede de brouillage et de debrouillage d'images de television

Publications (2)

Publication Number Publication Date
FR2486746A1 FR2486746A1 (fr) 1982-01-15
FR2486746B1 true FR2486746B1 (Direct) 1985-02-15

Family

ID=9244125

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8015504A Granted FR2486746A1 (fr) 1980-07-11 1980-07-11 Procede de brouillage et de debrouillage d'images de television

Country Status (1)

Country Link
FR (1) FR2486746A1 (Direct)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8401989A (nl) * 1984-06-22 1986-01-16 Nederlanden Staat Video-eindstation met beeldlijnverhaspeling.
US4815129A (en) * 1985-01-02 1989-03-21 General Instrument Corp. Video encryption system
FR2631192A1 (fr) * 1988-05-06 1989-11-10 Europ Rech Electr Lab Procede d'embrouillage d'images de television

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2472774A (en) * 1945-10-17 1949-06-07 Farnsworth Res Corp Irregular interlace scanning system
US2910526A (en) * 1953-07-24 1959-10-27 Zenith Radio Corp Secrecy communication system
US2879324A (en) * 1954-04-08 1959-03-24 Internat Telemeter Corp Video scrambling and unscrambling system
DE2348133C1 (de) * 1973-09-25 1978-06-15 Siemens Ag Verfahren zur Transformation zweidimensionaler Vorlagen
CA1021053A (en) * 1973-10-31 1977-11-15 John Ross Picture transmission systems

Also Published As

Publication number Publication date
FR2486746A1 (fr) 1982-01-15

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Legal Events

Date Code Title Description
ST Notification of lapse