ZA862838B - Method and apparatus for creating encrypted and decrypted television signals - Google Patents

Method and apparatus for creating encrypted and decrypted television signals

Info

Publication number
ZA862838B
ZA862838B ZA862838A ZA862838A ZA862838B ZA 862838 B ZA862838 B ZA 862838B ZA 862838 A ZA862838 A ZA 862838A ZA 862838 A ZA862838 A ZA 862838A ZA 862838 B ZA862838 B ZA 862838B
Authority
ZA
South Africa
Prior art keywords
signal
chrominance information
television signals
decrypted
luminance
Prior art date
Application number
ZA862838A
Other languages
English (en)
Inventor
John D Lowry
Keith Lucas
Original Assignee
Scientific Atlanta
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 Scientific Atlanta filed Critical Scientific Atlanta
Publication of ZA862838B publication Critical patent/ZA862838B/xx

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)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Television Systems (AREA)
  • Processing Of Color Television Signals (AREA)
  • Color Television Systems (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)
ZA862838A 1985-05-21 1986-04-16 Method and apparatus for creating encrypted and decrypted television signals ZA862838B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/736,301 US4642688A (en) 1983-06-24 1985-05-21 Method and apparatus for creating encrypted and decrypted television signals

Publications (1)

Publication Number Publication Date
ZA862838B true ZA862838B (en) 1986-12-30

Family

ID=24959344

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA862838A ZA862838B (en) 1985-05-21 1986-04-16 Method and apparatus for creating encrypted and decrypted television signals

Country Status (14)

Country Link
US (1) US4642688A (fr)
EP (1) EP0223781B1 (fr)
JP (2) JPH0666949B2 (fr)
CN (1) CN1005237B (fr)
AT (1) ATE130994T1 (fr)
AU (2) AU5869386A (fr)
BR (1) BR8606685A (fr)
CA (1) CA1332976C (fr)
DE (1) DE3650444T2 (fr)
DK (1) DK28987A (fr)
FI (1) FI85088C (fr)
MX (1) MX161937A (fr)
WO (1) WO1986007226A1 (fr)
ZA (1) ZA862838B (fr)

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US4965825A (en) 1981-11-03 1990-10-23 The Personalized Mass Media Corporation Signal processing apparatus and methods
USRE47642E1 (en) 1981-11-03 2019-10-08 Personalized Media Communications LLC Signal processing apparatus and methods
US7831204B1 (en) 1981-11-03 2010-11-09 Personalized Media Communications, Llc Signal processing apparatus and methods
US4796299A (en) * 1985-08-22 1989-01-03 Itt Corporation Video encoder apparatus
US4866770A (en) * 1986-07-08 1989-09-12 Scientific Atlanta, Inc. Method and apparatus for communication of video, audio, teletext, and data to groups of decoders in a communication system
US4837820A (en) * 1986-10-17 1989-06-06 Zenith Electronics Corporation Hybrid CATV scrambling system
US4901351A (en) * 1987-09-07 1990-02-13 Kabushiki Kaisha Toshiba Video signal scramble system
US4914694A (en) * 1988-04-11 1990-04-03 Eidak Corporation Modifying a television signal to inhibit recording/reproduction
US4916736A (en) * 1988-06-07 1990-04-10 Macrovision Corporation Method and apparatus for encrypting and decrypting time domain signals
GB8820103D0 (en) * 1988-08-24 1988-11-16 Screen Electronics Ltd Device & method
US5058157A (en) * 1989-09-06 1991-10-15 Macrovision Corporation Method and apparatus for encrypting and decrypting time domain signals
US5003590A (en) * 1989-12-18 1991-03-26 Eidak Corporation Encoding an optical video disc to inhibit video tape recording
SE466727B (sv) * 1991-04-04 1992-03-23 Persson Bjoern Tv-signaloeverfoerande betal-tv-system
US5212723A (en) * 1991-08-08 1993-05-18 Macrovision Corp. Burst phase correction system for video descrambling
JPH07193804A (ja) * 1991-11-15 1995-07-28 Pioneer Electron Corp 映像スクランブル方式およびその装置
US5590194A (en) * 1994-08-09 1996-12-31 Macrovision Corporation Method of and apparatus for scrambling a video signal with full network transmission and recording capability
US6334219B1 (en) * 1994-09-26 2001-12-25 Adc Telecommunications Inc. Channel selection for a hybrid fiber coax network
JP3072699B2 (ja) * 1994-10-25 2000-07-31 ソニー株式会社 ディジタル映像装置
USRE42236E1 (en) 1995-02-06 2011-03-22 Adc Telecommunications, Inc. Multiuse subcarriers in multipoint-to-point communication using orthogonal frequency division multiplexing
US7280564B1 (en) 1995-02-06 2007-10-09 Adc Telecommunications, Inc. Synchronization techniques in multipoint-to-point communication using orthgonal frequency division multiplexing
US6570990B1 (en) * 1998-11-13 2003-05-27 Lsi Logic Corporation Method of protecting high definition video signal
US7006633B1 (en) * 1999-07-16 2006-02-28 Global Encryption Standard Corporation Global encryption system
US7298849B2 (en) * 2001-06-29 2007-11-20 Intel Corporation Method and apparatus for simultaneous encryption and decryption of publicly distributed media
US8001374B2 (en) * 2005-12-16 2011-08-16 Lsi Corporation Memory encryption for digital video

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CA642144A (en) * 1962-06-05 M. Roschke Erwin Subscription television system
CA750074A (en) * 1967-01-03 Bass Patrick Television systems
US2547598A (en) * 1947-09-13 1951-04-03 Zenith Radio Corp Subscription image transmission system and apparatus
US2677719A (en) * 1948-05-29 1954-05-04 Zenith Radio Corp Subscriber television system
NL89372C (fr) * 1948-06-05
US2961481A (en) * 1954-12-30 1960-11-22 Hammond Secrecy television
US2972008A (en) * 1956-04-23 1961-02-14 Paramount Pictures Corp Coding methods and system
US3576391A (en) * 1968-06-26 1971-04-27 Rca Corp Television system for transmitting auxiliary information during the vertical blanking interval
CH518658A (de) * 1970-07-07 1972-01-31 Patelhold Patentverwaltungs Un Verfahren zur verschlüsselten Nachrichtenübermittlung durch zeitliche Vertauschung von Informationselementen
US3735027A (en) * 1970-11-02 1973-05-22 Skiatron Electronics Televisio Decoding scrambled television
GB1356193A (en) * 1971-03-04 1974-06-12 British Broadcasting Corp Processing and or distributing television signals
GB1382558A (en) * 1973-04-10 1975-02-05 Mullard Ltd Privacy transmission system
CH559483A5 (fr) * 1973-06-12 1975-02-28 Patelhold Patentverwertung
CH581412A5 (fr) * 1975-02-26 1976-10-29 Patelhold Patentverwertung
US4081826A (en) * 1975-05-15 1978-03-28 Sony Corporation Video time base corrector
CA1097794A (fr) * 1975-08-08 1981-03-17 Harold B. Shutterly Systeme de transmission secrete d'images de television
GB1557741A (en) * 1977-04-28 1979-12-12 Teleglobe Pay Tv System Inc Subscription television system
GB1602119A (en) * 1977-11-18 1981-11-04 Shiu Hung Cheung Pay-tv system
DE2811221A1 (de) * 1978-03-15 1979-09-20 Tekade Felten & Guilleaume Verfahren und schaltungsanordnung zur wiedergewinnung der mittleren bildhelligkeit eines videosignals
FR2459595A1 (fr) * 1979-06-15 1981-01-09 Telediffusion Fse Systeme de television a controle d'acces utilisant une cle electronique variable
NO802740L (no) * 1979-10-18 1981-04-21 Crypto Ag Fremgangsmaate og anordning til kodet overfoering av informasjon
US4319273A (en) * 1979-10-26 1982-03-09 Rca Corporation Television signal with encoded synchronizing signals
US4338628A (en) * 1979-12-19 1982-07-06 Dynacom International, Inc. Scrambled video communication system
US4330794A (en) * 1979-12-31 1982-05-18 Gte Automatic Electric Laboratories, Inc. Multichannel subscription television system
US4335393A (en) * 1980-04-15 1982-06-15 Harris Video Systems, Inc. Method and system using sequentially encoded color and luminance processing of video type signals to improve picture quality
US4325079A (en) * 1980-06-09 1982-04-13 Little William D Secure video transmission system
US4398216A (en) * 1980-09-19 1983-08-09 Telease, Inc. Multiple signal transmission method and system, particularly for television
US4405942A (en) * 1981-02-25 1983-09-20 Telease, Inc. Method and system for secure transmission and reception of video information, particularly for television
CA1153103A (fr) * 1981-03-19 1983-08-30 Northern Telecom Limited Brouillage et reconstitution des signaux video dans un systeme de television payante
CA1150821A (fr) * 1981-03-19 1983-07-26 Northern Telecom Limited Transmission de donnees avec un signal video
US4466017A (en) * 1981-12-23 1984-08-14 Scientific-Atlanta, Inc. Sync suppression scrambling of television signals for subscription TV
EP0105897A1 (fr) * 1982-04-23 1984-04-25 Independent Broadcasting Authority Codage de signaux pour une transmission sure
CA1338158C (fr) * 1982-07-15 1996-03-12 John D. Lowry Chiffrement et dechiffrement (brouillage et debrouillage) de signaux video
DE3479952D1 (en) * 1983-04-21 1989-11-02 Gen Instrument Corp Scrambling system for television video signal
FR2567349B1 (fr) * 1984-07-03 1986-12-12 Labo Electronique Physique Systeme de television de type mac adapte a la diffusion d'images au format 5/3, dispositif d'interface entre ce systeme et les recepteurs au format 4/3, et recepteur de television equipe d'un tel dispositif
US4652903A (en) * 1984-09-21 1987-03-24 Scientific Atlanta, Inc. Frequency generation for multiplexed analog component color television encoding and decoding
FR2575891B1 (fr) * 1985-01-08 1987-02-20 Labo Electronique Physique Dispositif de decodage et de dechiffrement de signaux ayant subi un codage de type mac et un chiffrement par permutation circulaire autour d'un ou de deux points de coupure, et dispositif de codage et de chiffrement fonctionnant de facon similaire

Also Published As

Publication number Publication date
CA1332976C (fr) 1994-11-08
DK28987D0 (da) 1987-01-20
DK28987A (da) 1987-03-05
ATE130994T1 (de) 1995-12-15
FI85088B (fi) 1991-11-15
FI870237A0 (fi) 1987-01-21
JPS62503067A (ja) 1987-12-03
AU5609290A (en) 1990-09-20
JPH07303248A (ja) 1995-11-14
BR8606685A (pt) 1987-08-11
JP2532819B2 (ja) 1996-09-11
AU5869386A (en) 1986-12-24
EP0223781B1 (fr) 1995-11-29
EP0223781A4 (fr) 1988-10-20
WO1986007226A1 (fr) 1986-12-04
MX161937A (es) 1991-03-08
EP0223781A1 (fr) 1987-06-03
JPH0666949B2 (ja) 1994-08-24
FI870237A (fi) 1987-01-21
DE3650444D1 (de) 1996-01-11
FI85088C (fi) 1992-02-25
CN86103059A (zh) 1986-11-19
AU622802B2 (en) 1992-04-16
US4642688A (en) 1987-02-10
CN1005237B (zh) 1989-09-20
DE3650444T2 (de) 1996-04-18

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