DK469581A - Fremgangsmaade og anlaeg til sikret udsendelse og modtagelse af videoinformation isaer til fjernsyn - Google Patents

Fremgangsmaade og anlaeg til sikret udsendelse og modtagelse af videoinformation isaer til fjernsyn

Info

Publication number
DK469581A
DK469581A DK469581A DK469581A DK469581A DK 469581 A DK469581 A DK 469581A DK 469581 A DK469581 A DK 469581A DK 469581 A DK469581 A DK 469581A DK 469581 A DK469581 A DK 469581A
Authority
DK
Denmark
Prior art keywords
video
video signal
parts
sequence
reorganized
Prior art date
Application number
DK469581A
Other languages
English (en)
Other versions
DK158433B (da
DK158433C (da
Inventor
R S Block
J R Martin
Original Assignee
Telease 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
Application filed by Telease Inc filed Critical Telease Inc
Publication of DK469581A publication Critical patent/DK469581A/da
Publication of DK158433B publication Critical patent/DK158433B/da
Application granted granted Critical
Publication of DK158433C publication Critical patent/DK158433C/da

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
    • H04N7/1696—Systems operating in the time domain of the television signal by changing or reversing the order of active picture signal portions

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Television Systems (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)
DK469581A 1980-02-25 1981-10-23 Fremgangsmaade og anlaeg til sikret udsendelse og modtagelse af videoinformation, isaer til fjernsyn DK158433C (da)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US12465680A 1980-02-25 1980-02-25
US12465680 1980-02-25
PCT/US1981/000227 WO1981002499A1 (en) 1980-02-25 1981-02-25 Method and system for secure transmission and reception of video information particularly for television
US8100227 1981-02-25

Publications (3)

Publication Number Publication Date
DK469581A true DK469581A (da) 1981-10-23
DK158433B DK158433B (da) 1990-05-14
DK158433C DK158433C (da) 1990-10-22

Family

ID=22416098

Family Applications (1)

Application Number Title Priority Date Filing Date
DK469581A DK158433C (da) 1980-02-25 1981-10-23 Fremgangsmaade og anlaeg til sikret udsendelse og modtagelse af videoinformation, isaer til fjernsyn

Country Status (9)

Country Link
EP (1) EP0046798B1 (da)
JP (1) JPH065955B2 (da)
AU (1) AU544397B2 (da)
BR (1) BR8107088A (da)
CA (1) CA1182555A (da)
DE (1) DE3176785D1 (da)
DK (1) DK158433C (da)
GB (1) GB2086181B (da)
WO (1) WO1981002499A1 (da)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2105953B (en) * 1981-08-14 1985-05-22 Sony Corp Methods of and apparatus for coding television signals
CA1231435A (en) * 1982-04-23 1988-01-12 Gordon M. Drury Signal coding for secure transmission
CA1338158C (en) * 1982-07-15 1996-03-12 John D. Lowry Encryption and decryption (scrambling and unscrambling) of video signals
FR2607341A1 (fr) * 1983-03-21 1988-05-27 Telediffusion Fse Procede d'embrouillage et de desembrouillage pour images de television
FR2543386B1 (fr) * 1983-03-21 1987-03-20 Telediffusion Fse Procedes et dispositifs d'embrouillage et de desembrouillage pour images de television
DE3475742D1 (en) * 1983-03-28 1989-01-26 Indep Broadcasting Authority Encryption of television signals
EP0123422A3 (en) * 1983-03-28 1985-04-03 Plessey Overseas Limited Apparatus for scrambling and unscrambling signals
DE3479952D1 (en) * 1983-04-21 1989-11-02 Gen Instrument Corp Scrambling system for television video signal
US4563702A (en) * 1983-05-27 1986-01-07 M/A-Com Linkabit, Inc. Video signal scrambling and descrambling systems
FR2561478B1 (fr) * 1984-03-16 1987-06-26 Labo Electronique Physique Dispositif de dechiffrement et de decodage d'images de television codees selon le standard mac et brouillees par application aux signaux video de permutations circulaires
CA1284211C (en) * 1985-04-29 1991-05-14 Terrence Henry Pocock Cable television system selectively distributing pre-recorder video and audio messages
FR2584556B1 (fr) * 1985-07-02 1987-09-18 France Etat Procede d'embrouillage et de desembrouillage d'images de television
US4736420A (en) * 1986-09-19 1988-04-05 M/A-Com Government Systems, Inc. Video scrambling by segmenting video information lines
DE3832611C2 (de) * 1987-09-30 1998-05-14 Thomson Brandt Gmbh Verschachtelung eines Videosignals
FR2626131B1 (fr) * 1988-01-14 1990-06-22 Telediffusion Fse Procede et dispositif de permutation de lignes de television par bloc
FR2631192A1 (fr) * 1988-05-06 1989-11-10 Europ Rech Electr Lab Procede d'embrouillage d'images de television
MY108367A (en) * 1991-09-30 1996-09-30 Thomson Consumer Electronics S A Method and apparatus for secure transmisson of video signals.
US5384497A (en) * 1992-11-04 1995-01-24 At&T Corp. Low-skew signal routing in a programmable array
US10110233B2 (en) 2016-06-23 2018-10-23 Altera Corporation Methods for specifying processor architectures for programmable integrated circuits

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2972008A (en) * 1956-04-23 1961-02-14 Paramount Pictures Corp Coding methods and system
JPS5754986B2 (da) * 1974-12-30 1982-11-20
CA1097794A (en) * 1975-08-08 1981-03-17 Harold B. Shutterly Secure television transmission system

Also Published As

Publication number Publication date
DK158433B (da) 1990-05-14
AU544397B2 (en) 1985-05-23
GB2086181B (en) 1985-04-17
CA1182555A (en) 1985-02-12
DK158433C (da) 1990-10-22
WO1981002499A1 (en) 1981-09-03
DE3176785D1 (en) 1988-07-14
GB2086181A (en) 1982-05-06
EP0046798A1 (en) 1982-03-10
JPH065955B2 (ja) 1994-01-19
BR8107088A (pt) 1982-01-05
JPS57500402A (da) 1982-03-04
AU7039581A (en) 1981-09-11
EP0046798B1 (en) 1988-06-08
EP0046798A4 (en) 1985-07-30

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Legal Events

Date Code Title Description
PBP Patent lapsed