DK121489A - Cryptographic or decryption device for a Mac remote TV system - Google Patents

Cryptographic or decryption device for a Mac remote TV system

Info

Publication number
DK121489A
DK121489A DK121489A DK121489A DK121489A DK 121489 A DK121489 A DK 121489A DK 121489 A DK121489 A DK 121489A DK 121489 A DK121489 A DK 121489A DK 121489 A DK121489 A DK 121489A
Authority
DK
Denmark
Prior art keywords
cryptographic
decryption device
mac remote
mac
remote
Prior art date
Application number
DK121489A
Other languages
Danish (da)
Other versions
DK121489D0 (en
Inventor
Issa Rakhodai
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 DK121489D0 publication Critical patent/DK121489D0/en
Publication of DK121489A publication Critical patent/DK121489A/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
    • H04N7/169—Systems operating in the time domain of the television signal
    • H04N7/1693—Systems operating in the time domain of the television signal by displacing synchronisation signals relative to active picture signals or vice versa

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
DK121489A 1988-07-06 1989-03-13 Cryptographic or decryption device for a Mac remote TV system DK121489A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8809165A FR2634085A1 (en) 1988-07-06 1988-07-06 DEVICE FOR SCREENING OR UNLOCKING FOR A MAC TELEVISION SYSTEM

Publications (2)

Publication Number Publication Date
DK121489D0 DK121489D0 (en) 1989-03-13
DK121489A true DK121489A (en) 1990-01-07

Family

ID=9368147

Family Applications (1)

Application Number Title Priority Date Filing Date
DK121489A DK121489A (en) 1988-07-06 1989-03-13 Cryptographic or decryption device for a Mac remote TV system

Country Status (5)

Country Link
EP (1) EP0349680A1 (en)
DK (1) DK121489A (en)
FI (1) FI885648A (en)
FR (1) FR2634085A1 (en)
NO (1) NO891154L (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1338158C (en) * 1982-07-15 1996-03-12 John D. Lowry Encryption and decryption (scrambling and unscrambling) of video signals
FR2562365B1 (en) * 1984-03-30 1988-02-05 Loire Electro Region Pays CIRCUITS FOR ENCODING AND DECODING A VIDEO SIGNAL ENCODED BY OFFSETTING THE IMAGE SIGNAL FROM THE SYNCHRONIZATION SIGNAL
GB2186768B (en) * 1985-04-19 1989-07-05 Emc Datacare Ltd Video display unit with improved security

Also Published As

Publication number Publication date
FI885648A0 (en) 1988-12-05
DK121489D0 (en) 1989-03-13
EP0349680A1 (en) 1990-01-10
FR2634085A1 (en) 1990-01-12
NO891154L (en) 1990-01-08
NO891154D0 (en) 1989-03-16
FI885648A (en) 1990-01-07

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