FR2583946B1 - ACCESS CONTROL TELEVISION SYSTEM USING A VARIABLE ELECTRONIC KEY - Google Patents

ACCESS CONTROL TELEVISION SYSTEM USING A VARIABLE ELECTRONIC KEY

Info

Publication number
FR2583946B1
FR2583946B1 FR8509679A FR8509679A FR2583946B1 FR 2583946 B1 FR2583946 B1 FR 2583946B1 FR 8509679 A FR8509679 A FR 8509679A FR 8509679 A FR8509679 A FR 8509679A FR 2583946 B1 FR2583946 B1 FR 2583946B1
Authority
FR
France
Prior art keywords
access control
electronic key
television system
control television
variable electronic
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
FR8509679A
Other languages
French (fr)
Other versions
FR2583946A1 (en
Inventor
Jean
Francois Gautier Christian
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.)
Etat Francais
Original Assignee
Etat Francais
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 Etat Francais filed Critical Etat Francais
Priority to FR8509679A priority Critical patent/FR2583946B1/en
Publication of FR2583946A1 publication Critical patent/FR2583946A1/en
Application granted granted Critical
Publication of FR2583946B1 publication Critical patent/FR2583946B1/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
    • H04N7/1675—Providing digital key or authorisation information for generation or regeneration of the scrambling sequence
FR8509679A 1985-06-24 1985-06-24 ACCESS CONTROL TELEVISION SYSTEM USING A VARIABLE ELECTRONIC KEY Expired FR2583946B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8509679A FR2583946B1 (en) 1985-06-24 1985-06-24 ACCESS CONTROL TELEVISION SYSTEM USING A VARIABLE ELECTRONIC KEY

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8509679A FR2583946B1 (en) 1985-06-24 1985-06-24 ACCESS CONTROL TELEVISION SYSTEM USING A VARIABLE ELECTRONIC KEY

Publications (2)

Publication Number Publication Date
FR2583946A1 FR2583946A1 (en) 1986-12-26
FR2583946B1 true FR2583946B1 (en) 1988-07-29

Family

ID=9320666

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8509679A Expired FR2583946B1 (en) 1985-06-24 1985-06-24 ACCESS CONTROL TELEVISION SYSTEM USING A VARIABLE ELECTRONIC KEY

Country Status (1)

Country Link
FR (1) FR2583946B1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2631193B1 (en) * 1988-05-06 1994-09-16 Europ Rech Electr Lab METHOD FOR SCRAMBLING AND SCALING-UP OF COMPOSITE VIDEO SIGNALS, AND IMPLEMENTING DEVICE
FR2638045A1 (en) * 1989-10-31 1990-04-20 Belloli Pascal Video and/or audio encoder/decoder
FR2750554B1 (en) * 1996-06-28 1998-08-14 Thomson Multimedia Sa CONDITIONAL ACCESS SYSTEM AND CHIP CARD ALLOWING SUCH ACCESS
FR2751817B1 (en) * 1996-07-29 1998-09-11 Thomson Multimedia Sa CONDITIONAL ACCESS SYSTEM USING MULTIPLE ENCRYPTION KEY MESSAGES

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4024574A (en) * 1975-02-26 1977-05-17 Teleglobe Pay Tv System Inc. Validation method and apparatus for pay television systems
US4112464A (en) * 1977-05-11 1978-09-05 Oak Industries Inc. Subscription TV decoder logic system
FR2459595A1 (en) * 1979-06-15 1981-01-09 Telediffusion Fse ACCESS CONTROL TELEVISION SYSTEM USING A VARIABLE ELECTRONIC KEY

Also Published As

Publication number Publication date
FR2583946A1 (en) 1986-12-26

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Legal Events

Date Code Title Description
TP Transmission of property
CL Concession to grant licenses
CL Concession to grant licenses