JPS56500076A - - Google Patents

Info

Publication number
JPS56500076A
JPS56500076A JP50038980A JP50038980A JPS56500076A JP S56500076 A JPS56500076 A JP S56500076A JP 50038980 A JP50038980 A JP 50038980A JP 50038980 A JP50038980 A JP 50038980A JP S56500076 A JPS56500076 A JP S56500076A
Authority
JP
Japan
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
JP50038980A
Other languages
Japanese (ja)
Other versions
JPH0318396B2 (US20100223739A1-20100909-C00005.png
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 filed Critical
Publication of JPS56500076A publication Critical patent/JPS56500076A/ja
Publication of JPH0318396B2 publication Critical patent/JPH0318396B2/ja
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00Television systems
    • H04N7/16Analogue secrecy systems; Analogue subscription systems
    • H04N7/167Systems rendering the television signal unintelligible and subsequently intelligible
    • H04N7/1675Providing digital key or authorisation information for generation or regeneration of the scrambling sequence

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Television Systems (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)
  • Lock And Its Accessories (AREA)
  • Small-Scale Networks (AREA)
JP55500389A 1979-02-06 1980-02-05 Expired JPH0318396B2 (US20100223739A1-20100909-C00005.png)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7902994A FR2448824A1 (fr) 1979-02-06 1979-02-06 Systeme de videotex muni de moyens de controle d'acces a l'information

Publications (2)

Publication Number Publication Date
JPS56500076A true JPS56500076A (US20100223739A1-20100909-C00005.png) 1981-01-22
JPH0318396B2 JPH0318396B2 (US20100223739A1-20100909-C00005.png) 1991-03-12

Family

ID=9221650

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55500389A Expired JPH0318396B2 (US20100223739A1-20100909-C00005.png) 1979-02-06 1980-02-05

Country Status (9)

Country Link
US (1) US4337483A (US20100223739A1-20100909-C00005.png)
EP (1) EP0014652B1 (US20100223739A1-20100909-C00005.png)
JP (1) JPH0318396B2 (US20100223739A1-20100909-C00005.png)
CA (1) CA1150820A (US20100223739A1-20100909-C00005.png)
DE (1) DE3064785D1 (US20100223739A1-20100909-C00005.png)
ES (1) ES8106994A1 (US20100223739A1-20100909-C00005.png)
FR (1) FR2448824A1 (US20100223739A1-20100909-C00005.png)
SU (1) SU1172456A3 (US20100223739A1-20100909-C00005.png)
WO (1) WO1980001636A1 (US20100223739A1-20100909-C00005.png)

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US4388643A (en) * 1981-04-06 1983-06-14 Northern Telecom Limited Method of controlling scrambling and unscrambling in a pay TV system
US4688218A (en) * 1981-07-15 1987-08-18 Etablissement Public De Diffusion Dit "Telediffusion De France" Multiplex channels for continuous flow for numerical signal
FR2514974B1 (fr) * 1981-10-15 1986-11-28 Telediffusion Fse Systeme de diffusion de donnees par paquets
US4965825A (en) 1981-11-03 1990-10-23 The Personalized Mass Media Corporation Signal processing apparatus and methods
US7831204B1 (en) 1981-11-03 2010-11-09 Personalized Media Communications, Llc Signal processing apparatus and methods
USRE47642E1 (en) * 1981-11-03 2019-10-08 Personalized Media Communications LLC Signal processing apparatus and methods
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US4429385A (en) 1981-12-31 1984-01-31 American Newspaper Publishers Association Method and apparatus for digital serial scanning with hierarchical and relational access
US4821321A (en) * 1981-12-31 1989-04-11 The United States Of America As Represented By The Secretary Of The Army Automatic secure transmission and reception of pictorial information
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Also Published As

Publication number Publication date
ES488280A0 (es) 1980-08-01
EP0014652B1 (fr) 1983-09-14
DE3064785D1 (en) 1983-10-20
ES8106994A1 (es) 1980-08-01
US4337483A (en) 1982-06-29
JPH0318396B2 (US20100223739A1-20100909-C00005.png) 1991-03-12
CA1150820A (en) 1983-07-26
FR2448824B1 (US20100223739A1-20100909-C00005.png) 1983-09-02
FR2448824A1 (fr) 1980-09-05
EP0014652A1 (fr) 1980-08-20
SU1172456A3 (ru) 1985-08-07
WO1980001636A1 (fr) 1980-08-07

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