ATE118950T1 - Verfahren zur ver- und entschlüsselung von zusammengesetzten videosignalen und gerät zur durchführung dieses verfahrens. - Google Patents

Verfahren zur ver- und entschlüsselung von zusammengesetzten videosignalen und gerät zur durchführung dieses verfahrens.

Info

Publication number
ATE118950T1
ATE118950T1 AT89403552T AT89403552T ATE118950T1 AT E118950 T1 ATE118950 T1 AT E118950T1 AT 89403552 T AT89403552 T AT 89403552T AT 89403552 T AT89403552 T AT 89403552T AT E118950 T1 ATE118950 T1 AT E118950T1
Authority
AT
Austria
Prior art keywords
composite video
video signals
decrypting
encrypting
smart card
Prior art date
Application number
AT89403552T
Other languages
German (de)
English (en)
Inventor
Michel Leduc
Francis Renard
Joel Hamon
Jean-Claude Guillon
Eric Diehl
Original Assignee
Europ Rech Electr Lab
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 Europ Rech Electr Lab filed Critical Europ Rech Electr Lab
Application granted granted Critical
Publication of ATE118950T1 publication Critical patent/ATE118950T1/de

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)
  • Television Systems (AREA)
  • Electrostatic Separation (AREA)
  • Television Signal Processing For Recording (AREA)
  • Glass Compositions (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
AT89403552T 1988-12-23 1989-12-19 Verfahren zur ver- und entschlüsselung von zusammengesetzten videosignalen und gerät zur durchführung dieses verfahrens. ATE118950T1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8817092A FR2641152B1 (enExample) 1988-12-23 1988-12-23

Publications (1)

Publication Number Publication Date
ATE118950T1 true ATE118950T1 (de) 1995-03-15

Family

ID=9373355

Family Applications (1)

Application Number Title Priority Date Filing Date
AT89403552T ATE118950T1 (de) 1988-12-23 1989-12-19 Verfahren zur ver- und entschlüsselung von zusammengesetzten videosignalen und gerät zur durchführung dieses verfahrens.

Country Status (11)

Country Link
EP (1) EP0375539B1 (enExample)
JP (1) JP2911595B2 (enExample)
AT (1) ATE118950T1 (enExample)
BR (1) BR8907275A (enExample)
CA (1) CA2006459A1 (enExample)
DE (1) DE68921316T2 (enExample)
ES (1) ES2070188T3 (enExample)
FR (1) FR2641152B1 (enExample)
MX (1) MX172194B (enExample)
NZ (1) NZ232005A (enExample)
WO (1) WO1990007845A1 (enExample)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9003325D0 (en) * 1990-02-14 1990-04-11 Enfranchise Sixty Ltd Apparatus and method for controlling access to broadcast signals
FR2703552A1 (fr) * 1993-03-31 1994-10-07 Philips Electronics Nv Procédé et dispositif pour l'embrouillage et le désembrouillage d'une émission déterminée de télévision.
FR2750554B1 (fr) * 1996-06-28 1998-08-14 Thomson Multimedia Sa Systeme a acces conditionnel et carte a puce permettant un tel acces
IL123554A (en) 1998-03-04 2003-01-12 Nds Ltd Key delivery in a secure broadcasting system
HU228951B1 (en) 1998-07-20 2013-07-29 Thomson Licensing Sa Navigation system for a multichannel digital television system
FR2804272B1 (fr) * 2000-01-25 2003-08-01 Tonna Electronique Systeme de controle d'acces d'un utilisateur a des programmes videos, transcodeur, decodeur et procede de controle d'acces d'un tel systeme
AU2001256645A1 (en) 2000-05-22 2001-12-03 Nds Limited Dynamically shifting control word
EP2230845A1 (en) * 2009-03-16 2010-09-22 Irdeto Access B.V. Providing control words to a receiver
CN111310220B (zh) * 2020-03-12 2023-07-28 四川大学 基于新型三维矢量分解的彩色图像加密方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1253616A (en) * 1982-07-29 1989-05-02 Robert W. Field Secure coding and decoding system and method for television program signals
GB2143352A (en) * 1983-07-15 1985-02-06 Philips Electronic Associated Authorising coded signals
GB2151886A (en) * 1983-12-21 1985-07-24 British Broadcasting Corp Conditional-access broadcast transmission

Also Published As

Publication number Publication date
EP0375539B1 (fr) 1995-02-22
DE68921316D1 (de) 1995-03-30
BR8907275A (pt) 1991-03-12
NZ232005A (en) 1991-11-26
FR2641152B1 (enExample) 1996-05-10
CA2006459A1 (fr) 1990-06-23
JPH03504313A (ja) 1991-09-19
EP0375539A1 (fr) 1990-06-27
FR2641152A1 (enExample) 1990-06-29
JP2911595B2 (ja) 1999-06-23
DE68921316T2 (de) 1995-08-31
MX172194B (es) 1993-12-07
ES2070188T3 (es) 1995-06-01
WO1990007845A1 (fr) 1990-07-12

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Legal Events

Date Code Title Description
UEP Publication of translation of european patent specification
REN Ceased due to non-payment of the annual fee