FR2154615A1 - - Google Patents

Info

Publication number
FR2154615A1
FR2154615A1 FR7234080A FR7234080A FR2154615A1 FR 2154615 A1 FR2154615 A1 FR 2154615A1 FR 7234080 A FR7234080 A FR 7234080A FR 7234080 A FR7234080 A FR 7234080A FR 2154615 A1 FR2154615 A1 FR 2154615A1
Authority
FR
France
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.)
Withdrawn
Application number
FR7234080A
Other languages
French (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.)
Optical Systems Corp
Original Assignee
Optical Systems Corp
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 Optical Systems Corp filed Critical Optical Systems Corp
Publication of FR2154615A1 publication Critical patent/FR2154615A1/fr
Withdrawn legal-status Critical Current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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Television Systems (AREA)
FR7234080A 1971-09-28 1972-09-27 Withdrawn FR2154615A1 (enExample)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US18447471A 1971-09-28 1971-09-28

Publications (1)

Publication Number Publication Date
FR2154615A1 true FR2154615A1 (enExample) 1973-05-11

Family

ID=22677026

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7234080A Withdrawn FR2154615A1 (enExample) 1971-09-28 1972-09-27

Country Status (6)

Country Link
US (1) US3769448A (enExample)
JP (1) JPS4842620A (enExample)
BE (1) BE789101A (enExample)
CH (1) CH549918A (enExample)
DE (1) DE2247547A1 (enExample)
FR (1) FR2154615A1 (enExample)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5617876B2 (enExample) * 1972-07-11 1981-04-24
US3826863A (en) * 1973-02-09 1974-07-30 Oak Industries Inc Subscription television system using audio and video carrier reversal
JPS51150912A (en) * 1975-06-20 1976-12-24 Hiroshi Saito Pay television system
JPS5767473U (enExample) * 1980-10-08 1982-04-22
USRE33189E (en) * 1981-11-19 1990-03-27 Communications Satellite Corporation Security system for SSTV encryption

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3231818A (en) * 1961-11-09 1966-01-25 Paramount Pictures Corp Audio secrecy system for subscription television

Also Published As

Publication number Publication date
CH549918A (de) 1974-05-31
JPS4842620A (enExample) 1973-06-21
US3769448A (en) 1973-10-30
BE789101A (fr) 1973-01-15
DE2247547A1 (de) 1973-04-05

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Legal Events

Date Code Title Description
ST Notification of lapse