FR2704703B1 - Appareil d'exploitation de signaux electriques. - Google Patents

Appareil d'exploitation de signaux electriques.

Info

Publication number
FR2704703B1
FR2704703B1 FR9305022A FR9305022A FR2704703B1 FR 2704703 B1 FR2704703 B1 FR 2704703B1 FR 9305022 A FR9305022 A FR 9305022A FR 9305022 A FR9305022 A FR 9305022A FR 2704703 B1 FR2704703 B1 FR 2704703B1
Authority
FR
France
Prior art keywords
electric signals
exploiting
exploiting electric
signals
electric
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.)
Expired - Fee Related
Application number
FR9305022A
Other languages
English (en)
Other versions
FR2704703A1 (fr
Inventor
Peyret Patrice
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.)
Gemplus SA
Original Assignee
Gemplus Card International SA
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 Gemplus Card International SA filed Critical Gemplus Card International SA
Priority to FR9305022A priority Critical patent/FR2704703B1/fr
Priority to US08/233,644 priority patent/US5511125A/en
Priority to JP6113778A priority patent/JPH0715713A/ja
Priority to DE4414953A priority patent/DE4414953C2/de
Publication of FR2704703A1 publication Critical patent/FR2704703A1/fr
Application granted granted Critical
Publication of FR2704703B1 publication Critical patent/FR2704703B1/fr
Priority to US08/546,638 priority patent/US5689569A/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • H04N7/161—Constructional details of the subscriber equipment

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Storage Device Security (AREA)
FR9305022A 1993-04-28 1993-04-28 Appareil d'exploitation de signaux electriques. Expired - Fee Related FR2704703B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
FR9305022A FR2704703B1 (fr) 1993-04-28 1993-04-28 Appareil d'exploitation de signaux electriques.
US08/233,644 US5511125A (en) 1993-04-28 1994-04-26 Method and device for the utilization of electrical signals
JP6113778A JPH0715713A (ja) 1993-04-28 1994-04-28 電気信号処理装置
DE4414953A DE4414953C2 (de) 1993-04-28 1994-04-28 Gerät zur Verarbeitung elektrischer Signale
US08/546,638 US5689569A (en) 1993-04-28 1995-10-23 Method and device for the utilization of electrical signals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9305022A FR2704703B1 (fr) 1993-04-28 1993-04-28 Appareil d'exploitation de signaux electriques.

Publications (2)

Publication Number Publication Date
FR2704703A1 FR2704703A1 (fr) 1994-11-04
FR2704703B1 true FR2704703B1 (fr) 1995-06-30

Family

ID=9446531

Family Applications (1)

Application Number Title Priority Date Filing Date
FR9305022A Expired - Fee Related FR2704703B1 (fr) 1993-04-28 1993-04-28 Appareil d'exploitation de signaux electriques.

Country Status (4)

Country Link
US (2) US5511125A (fr)
JP (1) JPH0715713A (fr)
DE (1) DE4414953C2 (fr)
FR (1) FR2704703B1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19617508A1 (de) * 1996-05-02 1997-11-13 Grundig Emv Empfangseinrichtung mit digitaler Schnittstelle für Fernsehgerät
US6757913B2 (en) 1996-07-15 2004-06-29 Gregory D. Knox Wireless music and data transceiver system
US5818934A (en) * 1996-12-18 1998-10-06 Phillips Electronics North America Corporation Method and apparatus for providing a cryptographically secure interface between the decryption engine and the system decoder of a digital television receiver
US7068788B2 (en) * 2001-01-04 2006-06-27 Maxim Integrated Products, Inc. Data encryption for suppression of data-related in-band harmonics in digital to analog converters

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2313825A1 (fr) * 1975-06-06 1976-12-31 Telediffusion Fse Systeme de diffusion de donnees
GB1513802A (en) * 1975-08-30 1978-06-07 Ferranti Ltd Communication systems
GB2118806B (en) * 1982-04-22 1985-10-30 Elliott Bros Communication system
GB2140656A (en) * 1983-05-13 1984-11-28 Philips Electronic Associated Television transmission system
EP0151147B1 (fr) * 1983-07-22 1988-04-20 Independent Broadcasting Authority Systeme de securite pour le chiffrage de signaux de television
US4885775A (en) * 1984-09-21 1989-12-05 Scientific-Atlanta, Inc. Information display scheme for subscribers of a subscription television system
US4908834A (en) * 1984-10-12 1990-03-13 Wiedemer John D High security pay television system
US4907273A (en) * 1984-10-12 1990-03-06 Wiedemer John D High security pay television system
US4905280A (en) * 1984-10-12 1990-02-27 Wiedemer John D High security videotext and videogame system
GB2184272A (en) * 1985-11-25 1987-06-17 Philips Electronic Associated Interface between a receiver and a sub-system
DE3752343T2 (de) * 1986-04-18 2002-08-14 Nagra Plus S.A., Cheseaux-Sur-Lausanne Bezahlfernsehsystem
US4719624A (en) * 1986-05-16 1988-01-12 Bell Communications Research, Inc. Multilevel multiplexing
US4688247A (en) * 1986-06-05 1987-08-18 Oak Industries Inc. Pay TV scrambling by audio encryption
US4993066C1 (en) * 1987-02-26 2001-04-24 Techsearch L L C Method for television scrambling
US4807286A (en) * 1987-04-22 1989-02-21 Wiedemer John D High security pay television system
FI78373C (fi) * 1988-01-18 1989-07-10 Sostel Oy Telefontrafik- eller dataoeverfoeringssystem.
US5237610A (en) * 1990-02-01 1993-08-17 Scientific-Atlanta, Inc. Independent external security module for a digitally upgradeable television signal decoder

Also Published As

Publication number Publication date
DE4414953A1 (de) 1994-11-03
US5511125A (en) 1996-04-23
JPH0715713A (ja) 1995-01-17
FR2704703A1 (fr) 1994-11-04
US5689569A (en) 1997-11-18
DE4414953C2 (de) 1996-05-23

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Legal Events

Date Code Title Description
ST Notification of lapse

Effective date: 20111230