FR2390872A1 - Circuit logique pour un decodeur de television - Google Patents

Circuit logique pour un decodeur de television

Info

Publication number
FR2390872A1
FR2390872A1 FR7813913A FR7813913A FR2390872A1 FR 2390872 A1 FR2390872 A1 FR 2390872A1 FR 7813913 A FR7813913 A FR 7813913A FR 7813913 A FR7813913 A FR 7813913A FR 2390872 A1 FR2390872 A1 FR 2390872A1
Authority
FR
France
Prior art keywords
circuit
logic circuit
television
decoder
television decoder
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
FR7813913A
Other languages
English (en)
Other versions
FR2390872B1 (fr
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.)
Oak Industries Inc
Original Assignee
Oak Industries 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 Oak Industries Inc filed Critical Oak Industries Inc
Publication of FR2390872A1 publication Critical patent/FR2390872A1/fr
Application granted granted Critical
Publication of FR2390872B1 publication Critical patent/FR2390872B1/fr
Granted 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Circuits Of Receivers In General (AREA)
  • Television Systems (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)

Abstract

L'invention concerne les récepteurs de télévision. Un décodeur destiné à la réception d'émissions payantes par un récepteur de télévision comprend en particulier une section de commutation UHF 10, un tuner UHF 12, un circuit à fréquence intermédiaire 14, un circuit de sortie 16, un commutateur VHF 18, un circuit de commande automatique de fréquence 20, un circuit logique 22 et un circuit de récupération du son 24. Ce décodeur permet de décoder sélectivement des signaux codés par modulation d'amplitude avec une onde sinusoidale. Application aux réseaux de télévision à abonnement.
FR7813913A 1977-05-11 1978-05-10 Circuit logique pour un decodeur de television Granted FR2390872A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/795,765 US4112464A (en) 1977-05-11 1977-05-11 Subscription TV decoder logic system

Publications (2)

Publication Number Publication Date
FR2390872A1 true FR2390872A1 (fr) 1978-12-08
FR2390872B1 FR2390872B1 (fr) 1985-04-05

Family

ID=25166383

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7813913A Granted FR2390872A1 (fr) 1977-05-11 1978-05-10 Circuit logique pour un decodeur de television

Country Status (12)

Country Link
US (1) US4112464A (fr)
JP (1) JPS53144617A (fr)
AT (1) AT371301B (fr)
AU (1) AU512925B2 (fr)
BE (1) BE866974A (fr)
CA (1) CA1120581A (fr)
CH (1) CH633665A5 (fr)
DE (1) DE2820229C2 (fr)
FR (1) FR2390872A1 (fr)
GB (1) GB1584132A (fr)
MX (1) MX145098A (fr)
NL (1) NL7805026A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2583946A1 (fr) * 1985-06-24 1986-12-26 France Etat Systeme de television a controle d'acces utilisant une cle electronique variable

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4305101A (en) * 1979-04-16 1981-12-08 Codart, Inc. Method and apparatus for selectively recording a broadcast
US4323922A (en) * 1979-12-17 1982-04-06 Oak Industries Inc. Television coding system with channel level identification
US4340906A (en) * 1980-05-14 1982-07-20 Oak Industries Inc. Video signal coding by video signal polarity reversal on the basis of brightness level comparison
US4353088A (en) * 1980-05-14 1982-10-05 Oak Industries, Inc. Coding and decoding system for video and audio signals
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
USRE33189E (en) * 1981-11-19 1990-03-27 Communications Satellite Corporation Security system for SSTV encryption
US4494142A (en) * 1981-11-20 1985-01-15 Blonder-Tongue Laboratories, Inc. Method of and apparatus for scrambled television program addressable subscription selection and decoding
CA1177558A (fr) * 1982-04-15 1984-11-06 Groupe Videotron Ltee. (Le) Systeme de transmission de donnees par reseau cable
US4613901A (en) * 1983-05-27 1986-09-23 M/A-Com Linkabit, Inc. Signal encryption and distribution system for controlling scrambling and selective remote descrambling of television signals
EP0151147B1 (fr) * 1983-07-22 1988-04-20 Independent Broadcasting Authority Systeme de securite pour le chiffrage de signaux de television
CA1234876A (fr) * 1983-08-18 1988-04-05 Yoshio Ichikawa Appareil de radiocommunication bloque sur reception d'un signal predetermine
EP0140705B1 (fr) 1983-10-31 1992-04-08 R F Monolithics, Inc. Procédé et appareil pour embrouillage et désembrouillage de télévision
US4630108A (en) * 1984-03-26 1986-12-16 A. C. Nielsen Company Preprogrammed over-the-air marketing research system
US4797918A (en) * 1984-05-09 1989-01-10 Communications Satellite Corporation Subscription control for television programming
CA1284211C (fr) * 1985-04-29 1991-05-14 Terrence Henry Pocock Systeme de television par cable distribuant de facon selective des messages video et audio pre-enregistres
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
US4920566A (en) * 1989-02-01 1990-04-24 General Instrument Corporation Dual loop sinewave descrambler and method of descrambling
US5621793A (en) * 1995-05-05 1997-04-15 Rubin, Bednarek & Associates, Inc. TV set top box using GPS
US6108365A (en) * 1995-05-05 2000-08-22 Philip A. Rubin And Associates, Inc. GPS data access system
US5710815A (en) * 1995-06-07 1998-01-20 Vtech Communications, Ltd. Encoder apparatus and decoder apparatus for a television signal having embedded viewer access control data
JP4732013B2 (ja) * 2005-06-06 2011-07-27 コンビ株式会社 チャイルドシート

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3696297A (en) * 1970-09-01 1972-10-03 Richard J Otero Broadcast communication system including a plurality of subscriber stations for selectively receiving and reproducing one or more of a plurality of transmitted programs each having a unique identifying cone associated therewith
US3885089A (en) * 1973-02-16 1975-05-20 Hughes Aircraft Co Television scrambling system
US3896262A (en) * 1974-03-21 1975-07-22 Hughes Aircraft Co Subscription television jamming system
US3899633A (en) * 1972-05-12 1975-08-12 Columbia Pictures Ind Inc Subscription television system
US4019201A (en) * 1973-08-15 1977-04-19 System Development Corporation Method and apparatus for scrambling and unscrambling communication signals
US4024574A (en) * 1975-02-26 1977-05-17 Teleglobe Pay Tv System Inc. Validation method and apparatus for pay television systems

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3478166A (en) * 1963-09-09 1969-11-11 Intern Telemeter Corp Cryptographic subscription television system with grey sync and dual mode augmenting signals
US3772649A (en) * 1970-03-02 1973-11-13 Nielsen A C Co Data interface unit for insuring the error free transmission of fixed-length data sets which are transmitted repeatedly
US3777053A (en) * 1972-05-16 1973-12-04 Optical Systems Corp Converter for catv
JPS4929014A (fr) * 1972-07-12 1974-03-15
US3919462A (en) * 1973-08-15 1975-11-11 System Dev Corp Method and apparatus for scrambling and unscrambling communication signals
CH575694A5 (fr) * 1974-03-15 1976-05-14 Oak Industries Inc

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3696297A (en) * 1970-09-01 1972-10-03 Richard J Otero Broadcast communication system including a plurality of subscriber stations for selectively receiving and reproducing one or more of a plurality of transmitted programs each having a unique identifying cone associated therewith
US3899633A (en) * 1972-05-12 1975-08-12 Columbia Pictures Ind Inc Subscription television system
US3885089A (en) * 1973-02-16 1975-05-20 Hughes Aircraft Co Television scrambling system
US4019201A (en) * 1973-08-15 1977-04-19 System Development Corporation Method and apparatus for scrambling and unscrambling communication signals
US3896262A (en) * 1974-03-21 1975-07-22 Hughes Aircraft Co Subscription television jamming system
US4024574A (en) * 1975-02-26 1977-05-17 Teleglobe Pay Tv System Inc. Validation method and apparatus for pay television systems

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2583946A1 (fr) * 1985-06-24 1986-12-26 France Etat Systeme de television a controle d'acces utilisant une cle electronique variable

Also Published As

Publication number Publication date
US4112464B1 (fr) 1988-09-27
US4112464A (en) 1978-09-05
FR2390872B1 (fr) 1985-04-05
GB1584132A (en) 1981-02-04
DE2820229A1 (de) 1978-11-16
AT371301B (de) 1983-06-27
MX145098A (es) 1982-01-05
AU512925B2 (en) 1980-11-06
CH633665A5 (de) 1982-12-15
CA1120581A (fr) 1982-03-23
JPH0243400B2 (fr) 1990-09-28
AU3592178A (en) 1979-11-15
ATA344478A (de) 1982-10-15
DE2820229C2 (de) 1986-05-07
JPS53144617A (en) 1978-12-16
NL7805026A (nl) 1978-11-14
BE866974A (fr) 1978-09-01

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Legal Events

Date Code Title Description
TP Transmission of property