AU5917486A - Video transmission system using time-warp scrambling - Google Patents

Video transmission system using time-warp scrambling

Info

Publication number
AU5917486A
AU5917486A AU59174/86A AU5917486A AU5917486A AU 5917486 A AU5917486 A AU 5917486A AU 59174/86 A AU59174/86 A AU 59174/86A AU 5917486 A AU5917486 A AU 5917486A AU 5917486 A AU5917486 A AU 5917486A
Authority
AU
Australia
Prior art keywords
scrambling
warp
time
transmission system
video transmission
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
AU59174/86A
Other versions
AU583131B2 (en
Inventor
Jeffrey E. Frederiksen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Frederiksen & Shu Laboratories Inc
Original Assignee
Frederiksen & Shu Laboratories Inc
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
Priority claimed from US06/565,023 external-priority patent/US4605961A/en
Application filed by Frederiksen & Shu Laboratories Inc filed Critical Frederiksen & Shu Laboratories Inc
Publication of AU5917486A publication Critical patent/AU5917486A/en
Application granted granted Critical
Publication of AU583131B2 publication Critical patent/AU583131B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • 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
    • H04N7/1696—Systems operating in the time domain of the television signal by changing or reversing the order of active picture signal portions
AU59174/86A 1983-12-22 1986-06-24 Video transmission system using time-warp scrambling Ceased AU583131B2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/565,023 US4605961A (en) 1983-12-22 1983-12-22 Video transmission system using time-warp scrambling

Publications (2)

Publication Number Publication Date
AU5917486A true AU5917486A (en) 1988-01-07
AU583131B2 AU583131B2 (en) 1989-04-20

Family

ID=24256889

Family Applications (1)

Application Number Title Priority Date Filing Date
AU59174/86A Ceased AU583131B2 (en) 1983-12-22 1986-06-24 Video transmission system using time-warp scrambling

Country Status (1)

Country Link
AU (1) AU583131B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5282249A (en) * 1989-11-14 1994-01-25 Michael Cohen System for controlling access to broadcast transmissions

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IL92310A (en) * 1989-11-14 1994-05-30 News Datacom Ltd System for controlling access to broadcast transmissions

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU1888183A (en) * 1982-07-29 1984-02-23 Telease, Inc. Secure coding and decoding system and method for television program signals
US4563702A (en) * 1983-05-27 1986-01-07 M/A-Com Linkabit, Inc. Video signal scrambling and descrambling systems
US4598318A (en) * 1983-06-10 1986-07-01 General Instrument Corporation Video encryption system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5282249A (en) * 1989-11-14 1994-01-25 Michael Cohen System for controlling access to broadcast transmissions
US5481609A (en) * 1989-11-14 1996-01-02 News Data Security Products Ltd. System for controlling access to broadcast transmissions

Also Published As

Publication number Publication date
AU583131B2 (en) 1989-04-20

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