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FR2645692B1 - SYSTEM FOR THE SECRET TRANSMISSION OF AUDIO SIGNALS: SPECTRUM INVERSION CRYPTOPHONY. TELEVISION, RADIO, TELEPHONE FOLLOWING THE PROCESS. DEVICES FOR PRODUCING ENCODERS OR DECODERS - Google Patents

SYSTEM FOR THE SECRET TRANSMISSION OF AUDIO SIGNALS: SPECTRUM INVERSION CRYPTOPHONY. TELEVISION, RADIO, TELEPHONE FOLLOWING THE PROCESS. DEVICES FOR PRODUCING ENCODERS OR DECODERS

Info

Publication number
FR2645692B1
FR2645692B1 FR8903613A FR8903613A FR2645692B1 FR 2645692 B1 FR2645692 B1 FR 2645692B1 FR 8903613 A FR8903613 A FR 8903613A FR 8903613 A FR8903613 A FR 8903613A FR 2645692 B1 FR2645692 B1 FR 2645692B1
Authority
FR
France
Prior art keywords
cryptophony
decoders
encoders
television
radio
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 - Lifetime
Application number
FR8903613A
Other languages
French (fr)
Other versions
FR2645692A1 (en
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to FR8903613A priority Critical patent/FR2645692B1/en
Publication of FR2645692A1 publication Critical patent/FR2645692A1/en
Application granted granted Critical
Publication of FR2645692B1 publication Critical patent/FR2645692B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K1/00—Secret communication
    • H04K1/003—Secret communication by varying carrier frequency at or within predetermined or random intervals

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Multimedia (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
FR8903613A 1989-03-20 1989-03-20 SYSTEM FOR THE SECRET TRANSMISSION OF AUDIO SIGNALS: SPECTRUM INVERSION CRYPTOPHONY. TELEVISION, RADIO, TELEPHONE FOLLOWING THE PROCESS. DEVICES FOR PRODUCING ENCODERS OR DECODERS Expired - Lifetime FR2645692B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8903613A FR2645692B1 (en) 1989-03-20 1989-03-20 SYSTEM FOR THE SECRET TRANSMISSION OF AUDIO SIGNALS: SPECTRUM INVERSION CRYPTOPHONY. TELEVISION, RADIO, TELEPHONE FOLLOWING THE PROCESS. DEVICES FOR PRODUCING ENCODERS OR DECODERS

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8903613A FR2645692B1 (en) 1989-03-20 1989-03-20 SYSTEM FOR THE SECRET TRANSMISSION OF AUDIO SIGNALS: SPECTRUM INVERSION CRYPTOPHONY. TELEVISION, RADIO, TELEPHONE FOLLOWING THE PROCESS. DEVICES FOR PRODUCING ENCODERS OR DECODERS

Publications (2)

Publication Number Publication Date
FR2645692A1 FR2645692A1 (en) 1990-10-12
FR2645692B1 true FR2645692B1 (en) 1992-08-14

Family

ID=9379864

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8903613A Expired - Lifetime FR2645692B1 (en) 1989-03-20 1989-03-20 SYSTEM FOR THE SECRET TRANSMISSION OF AUDIO SIGNALS: SPECTRUM INVERSION CRYPTOPHONY. TELEVISION, RADIO, TELEPHONE FOLLOWING THE PROCESS. DEVICES FOR PRODUCING ENCODERS OR DECODERS

Country Status (1)

Country Link
FR (1) FR2645692B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6366326B1 (en) 1996-08-01 2002-04-02 Thomson Consumer Electronics Inc. System for acquiring, processing, and storing video data and program guides transmitted in different coding formats

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL6612935A (en) * 1966-09-14 1968-03-15
US4068198A (en) * 1976-12-23 1978-01-10 Gte Sylvania Incorporated Phase-locked loop frequency shift key modulator
FR2520955B1 (en) * 1982-01-29 1987-11-13 Radiotechnique ELECTRONIC SYSTEM FOR SECRET TRANSMISSION OF AUDIO SIGNALS
JPS61139136A (en) * 1984-12-11 1986-06-26 Sony Corp Transmitter and receiver

Also Published As

Publication number Publication date
FR2645692A1 (en) 1990-10-12

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Legal Events

Date Code Title Description
ST Notification of lapse