DE3470368D1 - Key signal encryption and distribution system for controlling scrambling and selective, remote descrambling of television signals - Google Patents

Key signal encryption and distribution system for controlling scrambling and selective, remote descrambling of television signals

Info

Publication number
DE3470368D1
DE3470368D1 DE8484303320T DE3470368T DE3470368D1 DE 3470368 D1 DE3470368 D1 DE 3470368D1 DE 8484303320 T DE8484303320 T DE 8484303320T DE 3470368 T DE3470368 T DE 3470368T DE 3470368 D1 DE3470368 D1 DE 3470368D1
Authority
DE
Germany
Prior art keywords
selective
distribution system
key signal
television signals
signal encryption
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
DE8484303320T
Other languages
English (en)
Inventor
Klein S Gilhousen
Charles F Newby
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.)
Engility LLC
Original Assignee
MA Com Government Systems Inc
Cable Home Communication Corp
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=23982554&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE3470368(D1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by MA Com Government Systems Inc, Cable Home Communication Corp filed Critical MA Com Government Systems Inc
Application granted granted Critical
Publication of DE3470368D1 publication Critical patent/DE3470368D1/de
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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Selective Calling Equipment (AREA)
DE8484303320T 1983-05-27 1984-05-16 Key signal encryption and distribution system for controlling scrambling and selective, remote descrambling of television signals Expired DE3470368D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/498,800 US4613901A (en) 1983-05-27 1983-05-27 Signal encryption and distribution system for controlling scrambling and selective remote descrambling of television signals

Publications (1)

Publication Number Publication Date
DE3470368D1 true DE3470368D1 (en) 1988-05-11

Family

ID=23982554

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8484303320T Expired DE3470368D1 (en) 1983-05-27 1984-05-16 Key signal encryption and distribution system for controlling scrambling and selective, remote descrambling of television signals

Country Status (8)

Country Link
US (1) US4613901A (de)
EP (1) EP0127381B1 (de)
JP (2) JPS6057783A (de)
AU (1) AU559463B2 (de)
CA (1) CA1242793A (de)
DE (1) DE3470368D1 (de)
DK (1) DK167332B1 (de)
NO (1) NO166110C (de)

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JPH0296489A (ja) 1990-04-09
NO166110C (no) 1991-05-29
NO166110B (no) 1991-02-18
DK255484D0 (da) 1984-05-24
EP0127381A1 (de) 1984-12-05
JPH056398B2 (de) 1993-01-26
US4613901A (en) 1986-09-23
CA1242793A (en) 1988-10-04
DK255484A (da) 1984-11-28
JPS6057783A (ja) 1985-04-03
NO842067L (no) 1984-11-28
EP0127381B1 (de) 1988-04-06
DK167332B1 (da) 1993-10-11
AU559463B2 (en) 1987-03-12
AU2870784A (en) 1984-11-29
JPH055239B2 (de) 1993-01-21

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