FI864752L - Mottagare foer mottagning av foervraengda signaler - Google Patents

Mottagare foer mottagning av foervraengda signaler Download PDF

Info

Publication number
FI864752L
FI864752L FI864752A FI864752A FI864752L FI 864752 L FI864752 L FI 864752L FI 864752 A FI864752 A FI 864752A FI 864752 A FI864752 A FI 864752A FI 864752 L FI864752 L FI 864752L
Authority
FI
Finland
Prior art keywords
foervraengda
mottagare
signaler
mottagning
foer
Prior art date
Application number
FI864752A
Other languages
English (en)
Other versions
FI864752A0 (fi
FI81938C (fi
FI81938B (fi
Inventor
Bruce Murray
Original Assignee
Philips Nv
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 Philips Nv filed Critical Philips Nv
Publication of FI864752A0 publication Critical patent/FI864752A0/fi
Publication of FI864752L publication Critical patent/FI864752L/fi
Application granted granted Critical
Publication of FI81938B publication Critical patent/FI81938B/fi
Publication of FI81938C publication Critical patent/FI81938C/fi

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)
  • Radio Relay Systems (AREA)
FI864752A 1985-11-25 1986-11-21 Mottagare foer mottagning av foervraengda signaler. FI81938C (fi)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8529004 1985-11-25
GB08529004A GB2183378A (en) 1985-11-25 1985-11-25 Receiving scrambled signals

Publications (4)

Publication Number Publication Date
FI864752A0 FI864752A0 (fi) 1986-11-21
FI864752L true FI864752L (fi) 1987-05-26
FI81938B FI81938B (fi) 1990-08-31
FI81938C FI81938C (fi) 1990-12-10

Family

ID=10588751

Family Applications (1)

Application Number Title Priority Date Filing Date
FI864752A FI81938C (fi) 1985-11-25 1986-11-21 Mottagare foer mottagning av foervraengda signaler.

Country Status (5)

Country Link
US (1) US4817143A (fi)
EP (1) EP0228108A3 (fi)
JP (1) JPS62188490A (fi)
FI (1) FI81938C (fi)
GB (1) GB2183378A (fi)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2694860B1 (fr) * 1992-08-13 1994-09-30 France Telecom Procédés de diffusion et de réception de programmes de télévision à accès conditionnel à temps de commutation de programmes réduit.
GB9514525D0 (en) * 1995-07-15 1995-09-13 Philips Electronics Uk Ltd Data packet handling
JP4491069B2 (ja) * 1995-10-31 2010-06-30 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ 時間シフト限定アクセス
GB9809685D0 (en) * 1998-05-06 1998-07-01 Sony Uk Ltd Ncam AV/C CTS subunit proposal
US7801820B2 (en) * 2003-01-13 2010-09-21 Sony Corporation Real-time delivery of license for previously stored encrypted content

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55127777A (en) * 1979-03-24 1980-10-02 Pioneer Electronic Corp Scramble method of catv system
US4531021A (en) * 1980-06-19 1985-07-23 Oak Industries Inc. Two level encripting of RF signals
US4475123A (en) * 1981-04-02 1984-10-02 Theta-Com., Division Of Texscan Addressable subscriber cable television system
US4484027A (en) * 1981-11-19 1984-11-20 Communications Satellite Corporation Security system for SSTV encryption
CA1231435A (en) * 1982-04-23 1988-01-12 Gordon M. Drury Signal coding for secure transmission
US4600942A (en) * 1982-07-29 1986-07-15 Telease, Inc. Secure coding and decoding system and method for television program signals
GB2140656A (en) * 1983-05-13 1984-11-28 Philips Electronic Associated Television transmission system
US4613901A (en) * 1983-05-27 1986-09-23 M/A-Com Linkabit, Inc. Signal encryption and distribution system for controlling scrambling and selective remote descrambling of television signals
EP0148235B1 (en) * 1983-06-30 1988-10-05 Independent Broadcasting Authority Encrypted broadcast television system
JPS6016082A (ja) * 1983-07-07 1985-01-26 Sony Corp スクランブルテレビジヨン信号の伝送方式
DE3343307A1 (de) * 1983-11-30 1985-06-05 Blaupunkt-Werke Gmbh, 3200 Hildesheim Verfahren zum verschluesseln und entschluesseln von analogen signalen, sowie schaltungsanordnung zur durchfuehrung des verfahrens
GB2151886A (en) * 1983-12-21 1985-07-24 British Broadcasting Corp Conditional-access broadcast transmission
US4682360A (en) * 1983-12-22 1987-07-21 Frederiksen Jeffrey E Video transmission system
FR2561478B1 (fr) * 1984-03-16 1987-06-26 Labo Electronique Physique Dispositif de dechiffrement et de decodage d'images de television codees selon le standard mac et brouillees par application aux signaux video de permutations circulaires
US4694491A (en) * 1985-03-11 1987-09-15 General Instrument Corp. Cryptographic system using interchangeable key blocks and selectable key fragments
US4731840A (en) * 1985-05-06 1988-03-15 The United States Of America As Represented By The United States Department Of Energy Method for encryption and transmission of digital keying data
JPH0685517B2 (ja) * 1985-06-28 1994-10-26 ソニー株式会社 情報サ−ビスシステム

Also Published As

Publication number Publication date
GB2183378A (en) 1987-06-03
US4817143A (en) 1989-03-28
FI864752A0 (fi) 1986-11-21
EP0228108A2 (en) 1987-07-08
JPS62188490A (ja) 1987-08-18
FI81938C (fi) 1990-12-10
FI81938B (fi) 1990-08-31
GB8529004D0 (en) 1986-01-02
EP0228108A3 (en) 1989-01-04

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Legal Events

Date Code Title Description
MM Patent lapsed

Owner name: N.V. PHILIPS GLOEILAMPENFABRIEKEN