NZ232005A - Video signal line scrambling: part of scrambling code on one line - Google Patents

Video signal line scrambling: part of scrambling code on one line

Info

Publication number
NZ232005A
NZ232005A NZ232005A NZ23200590A NZ232005A NZ 232005 A NZ232005 A NZ 232005A NZ 232005 A NZ232005 A NZ 232005A NZ 23200590 A NZ23200590 A NZ 23200590A NZ 232005 A NZ232005 A NZ 232005A
Authority
NZ
New Zealand
Prior art keywords
scrambling
line
video signal
signal line
smart card
Prior art date
Application number
NZ232005A
Inventor
Michel Leduc
Joel Hamon
Jean-Claude Guillon
Francis Renard
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
Publication of NZ232005A publication Critical patent/NZ232005A/en

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)
  • Television Signal Processing For Recording (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Glass Compositions (AREA)

Abstract

The process of the invention consists of including series of access messages (ECM1, ECM2) when emitting composite video signals, unscrambling the resulting signals using a smart card reader, whereby the smart card comprises encoded digital data, and utilizing an interactive process for the identification of a digital signature.
NZ232005A 1988-12-23 1990-01-04 Video signal line scrambling: part of scrambling code on one line NZ232005A (en)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
NZ232005A true NZ232005A (en) 1991-11-26

Family

ID=9373355

Family Applications (1)

Application Number Title Priority Date Filing Date
NZ232005A NZ232005A (en) 1988-12-23 1990-01-04 Video signal line scrambling: part of scrambling code on one line

Country Status (11)

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

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 (en) * 1993-03-31 1994-10-07 Philips Electronics Nv Method and apparatus for scrambling and descrambling a specific television program
FR2750554B1 (en) * 1996-06-28 1998-08-14 Thomson Multimedia Sa CONDITIONAL ACCESS SYSTEM AND CHIP CARD ALLOWING SUCH ACCESS
IL123554A (en) 1998-03-04 2003-01-12 Nds Ltd Key delivery in a secure broadcasting system
ES2207953T3 (en) 1998-07-20 2004-06-01 Thomson Licensing S.A. NAVIGATION SYSTEM FOR MULTICHANNEL DIGITAL TELEVISION SYSTEM.
FR2804272B1 (en) * 2000-01-25 2003-08-01 Tonna Electronique SYSTEM FOR CONTROLLING A USER'S ACCESS TO VIDEO PROGRAMS, TRANSCODER, DECODER AND METHOD FOR CONTROLLING ACCESS TO SUCH A SYSTEM
GB2374998B (en) 2000-05-22 2004-10-13 Nds Ltd Dynamically shifting control word
EP2230845A1 (en) * 2009-03-16 2010-09-22 Irdeto Access B.V. Providing control words to a receiver
CN111310220B (en) * 2020-03-12 2023-07-28 四川大学 Color image encryption method based on novel three-dimensional vector decomposition

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
DE68921316T2 (en) 1995-08-31
MX172194B (en) 1993-12-07
FR2641152B1 (en) 1996-05-10
EP0375539A1 (en) 1990-06-27
EP0375539B1 (en) 1995-02-22
CA2006459A1 (en) 1990-06-23
ATE118950T1 (en) 1995-03-15
WO1990007845A1 (en) 1990-07-12
FR2641152A1 (en) 1990-06-29
JP2911595B2 (en) 1999-06-23
ES2070188T3 (en) 1995-06-01
JPH03504313A (en) 1991-09-19
DE68921316D1 (en) 1995-03-30
BR8907275A (en) 1991-03-12

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