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FR2559633B1 - METHOD AND DEVICE FOR INVERTING A TELEVISION VIDEO SIGNAL - Google Patents

METHOD AND DEVICE FOR INVERTING A TELEVISION VIDEO SIGNAL

Info

Publication number
FR2559633B1
FR2559633B1 FR8402043A FR8402043A FR2559633B1 FR 2559633 B1 FR2559633 B1 FR 2559633B1 FR 8402043 A FR8402043 A FR 8402043A FR 8402043 A FR8402043 A FR 8402043A FR 2559633 B1 FR2559633 B1 FR 2559633B1
Authority
FR
France
Prior art keywords
inverting
video signal
television video
television
signal
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
FR8402043A
Other languages
French (fr)
Other versions
FR2559633A1 (en
Inventor
Jean-Luc Michel Armand Foure
Gerard Claude Bernard Moline
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.)
Laboratoire Central de Telecommunications SA
Original Assignee
Laboratoire Central de Telecommunications SA
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 Laboratoire Central de Telecommunications SA filed Critical Laboratoire Central de Telecommunications SA
Priority to FR8402043A priority Critical patent/FR2559633B1/en
Publication of FR2559633A1 publication Critical patent/FR2559633A1/en
Application granted granted Critical
Publication of FR2559633B1 publication Critical patent/FR2559633B1/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H04N7/171—Systems operating in the amplitude domain of the television signal
    • H04N7/1716—Systems operating in the amplitude domain of the television signal by inverting the polarity of active picture signal portions

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Picture Signal Circuits (AREA)
FR8402043A 1984-02-10 1984-02-10 METHOD AND DEVICE FOR INVERTING A TELEVISION VIDEO SIGNAL Expired FR2559633B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8402043A FR2559633B1 (en) 1984-02-10 1984-02-10 METHOD AND DEVICE FOR INVERTING A TELEVISION VIDEO SIGNAL

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8402043A FR2559633B1 (en) 1984-02-10 1984-02-10 METHOD AND DEVICE FOR INVERTING A TELEVISION VIDEO SIGNAL

Publications (2)

Publication Number Publication Date
FR2559633A1 FR2559633A1 (en) 1985-08-16
FR2559633B1 true FR2559633B1 (en) 1989-01-13

Family

ID=9300929

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8402043A Expired FR2559633B1 (en) 1984-02-10 1984-02-10 METHOD AND DEVICE FOR INVERTING A TELEVISION VIDEO SIGNAL

Country Status (1)

Country Link
FR (1) FR2559633B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4924498A (en) * 1988-04-29 1990-05-08 Scientific Atlanta, Inc. Method and apparatus for improving video scrambling and employing split snyc pulses

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1602119A (en) * 1977-11-18 1981-11-04 Shiu Hung Cheung Pay-tv system
GB2042846B (en) * 1979-02-20 1983-05-11 Payview Ltd Secret television
US4257065A (en) * 1979-12-17 1981-03-17 Pay Television Corporation Video clamp and inverter circuit

Also Published As

Publication number Publication date
FR2559633A1 (en) 1985-08-16

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Legal Events

Date Code Title Description
ST Notification of lapse