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NO891154L - Anordning for scrambling eller descrambling ved et mac-tv-system. - Google Patents

Anordning for scrambling eller descrambling ved et mac-tv-system.

Info

Publication number
NO891154L
NO891154L NO89891154A NO891154A NO891154L NO 891154 L NO891154 L NO 891154L NO 89891154 A NO89891154 A NO 89891154A NO 891154 A NO891154 A NO 891154A NO 891154 L NO891154 L NO 891154L
Authority
NO
Norway
Prior art keywords
scrambling
mac
descrambling device
descrambling
Prior art date
Application number
NO89891154A
Other languages
English (en)
Norwegian (no)
Other versions
NO891154D0 (no
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 NO891154D0 publication Critical patent/NO891154D0/no
Publication of NO891154L publication Critical patent/NO891154L/no

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)
NO89891154A 1988-07-06 1989-03-16 Anordning for scrambling eller descrambling ved et mac-tv-system. NO891154L (no)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8809165A FR2634085A1 (fr) 1988-07-06 1988-07-06 Dispositif d'embrouillage ou de desembrouillage pour un systeme de television mac

Publications (2)

Publication Number Publication Date
NO891154D0 NO891154D0 (no) 1989-03-16
NO891154L true NO891154L (no) 1990-01-08

Family

ID=9368147

Family Applications (1)

Application Number Title Priority Date Filing Date
NO89891154A NO891154L (no) 1988-07-06 1989-03-16 Anordning for scrambling eller descrambling ved et mac-tv-system.

Country Status (5)

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

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 (fr) * 1984-03-30 1988-02-05 Loire Electro Region Pays Circuits de codage et de decodage d'un signal video code par un decalage du signal d'image par rapport au signal de synchronisation
GB2186768B (en) * 1985-04-19 1989-07-05 Emc Datacare Ltd Video display unit with improved security

Also Published As

Publication number Publication date
DK121489A (da) 1990-01-07
FI885648A (fi) 1990-01-07
NO891154D0 (no) 1989-03-16
EP0349680A1 (fr) 1990-01-10
FR2634085A1 (fr) 1990-01-12
DK121489D0 (da) 1989-03-13
FI885648A0 (fi) 1988-12-05

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