FR2668322B1 - Procede de protection contre le brouillage des signaux de television transmis par multiplexage en frequence et dispositif de multiplexage mettant en óoeuvre ce procede. - Google Patents

Procede de protection contre le brouillage des signaux de television transmis par multiplexage en frequence et dispositif de multiplexage mettant en óoeuvre ce procede.

Info

Publication number
FR2668322B1
FR2668322B1 FR9013095A FR9013095A FR2668322B1 FR 2668322 B1 FR2668322 B1 FR 2668322B1 FR 9013095 A FR9013095 A FR 9013095A FR 9013095 A FR9013095 A FR 9013095A FR 2668322 B1 FR2668322 B1 FR 2668322B1
Authority
FR
France
Prior art keywords
same
television signals
protecting against
multiplexing device
frequency multiplexed
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
FR9013095A
Other languages
English (en)
Other versions
FR2668322A1 (fr
Inventor
Lemaitre Gerard
Paquier Jean-Luc
Bonnevie Francois
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.)
Thomson LGT Laboratoire General des Telecommunications
Original Assignee
Thomson LGT Laboratoire General des Telecommunications
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 Thomson LGT Laboratoire General des Telecommunications filed Critical Thomson LGT Laboratoire General des Telecommunications
Priority to FR9013095A priority Critical patent/FR2668322B1/fr
Publication of FR2668322A1 publication Critical patent/FR2668322A1/fr
Application granted granted Critical
Publication of FR2668322B1 publication Critical patent/FR2668322B1/fr
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J1/00—Frequency-division multiplex systems
    • H04J1/02—Details
    • H04J1/12—Arrangements for reducing cross-talk between channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
    • H04N7/0803—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division using frequency interleaving, e.g. with precision offset

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Multimedia (AREA)
  • Television Systems (AREA)
FR9013095A 1990-10-23 1990-10-23 Procede de protection contre le brouillage des signaux de television transmis par multiplexage en frequence et dispositif de multiplexage mettant en óoeuvre ce procede. Expired - Fee Related FR2668322B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9013095A FR2668322B1 (fr) 1990-10-23 1990-10-23 Procede de protection contre le brouillage des signaux de television transmis par multiplexage en frequence et dispositif de multiplexage mettant en óoeuvre ce procede.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9013095A FR2668322B1 (fr) 1990-10-23 1990-10-23 Procede de protection contre le brouillage des signaux de television transmis par multiplexage en frequence et dispositif de multiplexage mettant en óoeuvre ce procede.

Publications (2)

Publication Number Publication Date
FR2668322A1 FR2668322A1 (fr) 1992-04-24
FR2668322B1 true FR2668322B1 (fr) 1993-04-23

Family

ID=9401471

Family Applications (1)

Application Number Title Priority Date Filing Date
FR9013095A Expired - Fee Related FR2668322B1 (fr) 1990-10-23 1990-10-23 Procede de protection contre le brouillage des signaux de television transmis par multiplexage en frequence et dispositif de multiplexage mettant en óoeuvre ce procede.

Country Status (1)

Country Link
FR (1) FR2668322B1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7003275B1 (en) * 2000-05-18 2006-02-21 Broadband Innovations, Inc. Agile frequency converter for multichannel systems using IF-RF level exhange and tunable filters

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR843528A (fr) * 1937-09-16 1939-07-05 Aeg Procédé pour l'utilisation économique de la bande de fréquences nécessaire pourune transmission de télévision
US2878318A (en) * 1956-02-15 1959-03-17 Nathaniel L Leek Multiplex transmission system
FR1303326A (fr) * 1961-10-10 1962-09-07 Nederlanden Staat Procédé pour réduire la diavision dans la transmission simultanée de voies de télévision coïncidant partiellement et dispositif pour la mise en oeuvre de ce procédé
US3742149A (en) * 1970-05-06 1973-06-26 Nippon Electric Co A frequency division multiplex microwave communication system using polarization division multiplex technique
GB1345537A (en) * 1970-07-09 1974-01-30 Marconi Co Ltd Electrical signal combining and separating arrangements
FR2165798B1 (fr) * 1971-12-31 1975-02-07 Adret Electronique
FR2530394B1 (fr) * 1982-07-13 1986-05-16 Thomson Csf Dispositif de multiplexage et de demultiplexage de voies video

Also Published As

Publication number Publication date
FR2668322A1 (fr) 1992-04-24

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Legal Events

Date Code Title Description
ST Notification of lapse