FR2524242B1 - Circuit de reconnaissance de cryptage pour systeme de transmission d'emissions de television et systeme de transmission d'emissions cryptees comprenant un tel circuit - Google Patents

Circuit de reconnaissance de cryptage pour systeme de transmission d'emissions de television et systeme de transmission d'emissions cryptees comprenant un tel circuit

Info

Publication number
FR2524242B1
FR2524242B1 FR8205008A FR8205008A FR2524242B1 FR 2524242 B1 FR2524242 B1 FR 2524242B1 FR 8205008 A FR8205008 A FR 8205008A FR 8205008 A FR8205008 A FR 8205008A FR 2524242 B1 FR2524242 B1 FR 2524242B1
Authority
FR
France
Prior art keywords
transmission system
broadcasting transmission
circuit
encrypted
system including
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
FR8205008A
Other languages
English (en)
Other versions
FR2524242A1 (fr
Inventor
Marcel Le Queau
Richard Dauvilliers
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.)
Radiotechnique SA
Original Assignee
Radiotechnique 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 Radiotechnique SA filed Critical Radiotechnique SA
Priority to FR8205008A priority Critical patent/FR2524242B1/fr
Publication of FR2524242A1 publication Critical patent/FR2524242A1/fr
Application granted granted Critical
Publication of FR2524242B1 publication Critical patent/FR2524242B1/fr
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
    • H04N7/169—Systems operating in the time domain of the television signal
    • H04N7/1693—Systems operating in the time domain of the television signal by displacing synchronisation signals relative to active picture signals or vice versa

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
FR8205008A 1982-03-24 1982-03-24 Circuit de reconnaissance de cryptage pour systeme de transmission d'emissions de television et systeme de transmission d'emissions cryptees comprenant un tel circuit Expired FR2524242B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8205008A FR2524242B1 (fr) 1982-03-24 1982-03-24 Circuit de reconnaissance de cryptage pour systeme de transmission d'emissions de television et systeme de transmission d'emissions cryptees comprenant un tel circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8205008A FR2524242B1 (fr) 1982-03-24 1982-03-24 Circuit de reconnaissance de cryptage pour systeme de transmission d'emissions de television et systeme de transmission d'emissions cryptees comprenant un tel circuit

Publications (2)

Publication Number Publication Date
FR2524242A1 FR2524242A1 (fr) 1983-09-30
FR2524242B1 true FR2524242B1 (fr) 1986-02-07

Family

ID=9272337

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8205008A Expired FR2524242B1 (fr) 1982-03-24 1982-03-24 Circuit de reconnaissance de cryptage pour systeme de transmission d'emissions de television et systeme de transmission d'emissions cryptees comprenant un tel circuit

Country Status (1)

Country Link
FR (1) FR2524242B1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59165585A (ja) * 1983-03-09 1984-09-18 Sony Corp テレビジヨン信号受信装置
US4554579A (en) * 1983-12-09 1985-11-19 Zenith Electronics Corporation Two-way CATV system with AML commands
CH666775A5 (fr) * 1986-03-07 1988-08-15 T D I Technical Developments A Procede et dispositifs d'analyse et de reconnaissance automatique du code de cryptage d'emissions de television.
MY108367A (en) * 1991-09-30 1996-09-30 Thomson Consumer Electronics S A Method and apparatus for secure transmisson of video signals.

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2961481A (en) * 1954-12-30 1960-11-22 Hammond Secrecy television
NL7016628A (fr) * 1970-11-13 1972-05-16
US4045814A (en) * 1973-08-15 1977-08-30 System Development Corporation Method and apparatus for scrambling and unscrambling communication signals
US4215366A (en) * 1977-10-19 1980-07-29 Feature Film Services Subscriber-limited reception television broadcast security encoder-decoder system

Also Published As

Publication number Publication date
FR2524242A1 (fr) 1983-09-30

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Legal Events

Date Code Title Description
TP Transmission of property
CD Change of name or company name
CD Change of name or company name