FR2296335B3 - - Google Patents

Info

Publication number
FR2296335B3
FR2296335B3 FR7539520A FR7539520A FR2296335B3 FR 2296335 B3 FR2296335 B3 FR 2296335B3 FR 7539520 A FR7539520 A FR 7539520A FR 7539520 A FR7539520 A FR 7539520A FR 2296335 B3 FR2296335 B3 FR 2296335B3
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.)
Expired
Application number
FR7539520A
Other versions
FR2296335A1 (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.)
DAK HOLLAND BV
Original Assignee
DAK HOLLAND BV
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 DAK HOLLAND BV filed Critical DAK HOLLAND BV
Publication of FR2296335A1 publication Critical patent/FR2296335A1/fr
Application granted granted Critical
Publication of FR2296335B3 publication Critical patent/FR2296335B3/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K3/00—Jamming of communication; Counter-measures
    • H04K3/80—Jamming or countermeasure characterized by its function
    • H04K3/82—Jamming or countermeasure characterized by its function related to preventing surveillance, interception or detection
    • H04K3/825—Jamming or countermeasure characterized by its function related to preventing surveillance, interception or detection by jamming
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K3/00—Jamming of communication; Counter-measures
    • H04K3/40—Jamming having variable characteristics
    • H04K3/42—Jamming having variable characteristics characterized by the control of the jamming frequency or wavelength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/166—Passage/non-passage of the television signal, e.g. jamming, band suppression
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K2203/00—Jamming of communication; Countermeasures
    • H04K2203/10—Jamming or countermeasure used for a particular application
    • H04K2203/14—Jamming or countermeasure used for a particular application for the transfer of light or images, e.g. for video-surveillance, for television or from a computer screen

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Multimedia (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Details Of Television Systems (AREA)
FR7539520A 1974-12-24 1975-12-23 Dispositif de distribution de signaux pour reseau de television par cables Granted FR2296335A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7416880A NL182689C (nl) 1974-12-24 1974-12-24 Signaalverdeelinrichting voor een hoogfrequent kabelnetwerk.

Publications (2)

Publication Number Publication Date
FR2296335A1 FR2296335A1 (fr) 1976-07-23
FR2296335B3 true FR2296335B3 (fr) 1980-06-20

Family

ID=19822721

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7539520A Granted FR2296335A1 (fr) 1974-12-24 1975-12-23 Dispositif de distribution de signaux pour reseau de television par cables

Country Status (13)

Country Link
JP (1) JPS608675B2 (fr)
AT (1) AT361996B (fr)
BE (1) BE836589A (fr)
CA (1) CA1033053A (fr)
DE (1) DE2558147A1 (fr)
DK (1) DK146915C (fr)
ES (1) ES443805A1 (fr)
FI (1) FI67006C (fr)
FR (1) FR2296335A1 (fr)
GB (1) GB1507859A (fr)
IT (1) IT1052630B (fr)
NL (1) NL182689C (fr)
SE (1) SE420036B (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1554411A (en) 1975-08-09 1979-10-17 Communications Patents Ltd Control systems
FR2336842B1 (fr) * 1976-08-06 1987-02-27 Stern Joseph Perfectionnements relatifs aux dispositifs de telediffusion par cables ou relatifs a ceux-ci
DE2725250C3 (de) * 1977-06-03 1982-03-18 Siemens AG, 1000 Berlin und 8000 München Kabelfernsehanlage mit abschaltbaren Teilnehmeranschlüssen
DE3045512C2 (de) * 1980-12-03 1982-10-07 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Elektronische Durchschalteinrichtung für Fernseh- und Tonrundfunkprogramme
JPS58221577A (ja) * 1982-06-18 1983-12-23 Yagi Antenna Co Ltd Ｃａｔｖ信号分配方式
JPS5921187A (ja) * 1982-07-27 1984-02-03 Uro Denshi Kogyo Kk 有線放送共同受信用分岐・分配器
US4521809A (en) * 1982-12-29 1985-06-04 North American Philips Corporation Method and apparatus for controlling access to selected television programs
EP0128554B1 (fr) * 1983-06-10 1988-03-30 Tocom, Inc. Système de transpondeur principal/secondaire
GB2161679B (en) * 1984-07-06 1988-02-24 Cabletime Ltd Improvements in or relating to signal jamming apparatuses for frequency division multiplex systems
FR2615342B1 (fr) * 1987-05-13 1991-09-13 Applic Realisa Electro Systeme de teledistribution comprenant au moins une chaine de television a peage
DE3840254C1 (fr) * 1988-11-29 1990-06-07 Neuberger Nachrichten- Und Antennentechnik Gmbh, 8000 Muenchen, De

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3790700A (en) * 1971-12-17 1974-02-05 Hughes Aircraft Co Catv program control system
US3789131A (en) * 1972-08-03 1974-01-29 Oak Industries Inc Selective coding system for subscription television

Also Published As

Publication number Publication date
AT361996B (de) 1981-04-10
DE2558147A1 (de) 1976-07-01
IT1052630B (it) 1981-07-20
DK586075A (da) 1976-06-25
FI67006C (fi) 1984-12-10
FR2296335A1 (fr) 1976-07-23
CA1033053A (fr) 1978-06-13
SE420036B (sv) 1981-09-07
GB1507859A (en) 1978-04-19
FI67006B (fi) 1984-08-31
DK146915C (da) 1984-07-16
NL182689B (nl) 1987-11-16
FI753640A (fr) 1976-06-25
NL7416880A (nl) 1976-06-28
ES443805A1 (es) 1977-04-16
SE7514561L (sv) 1976-06-25
ATA955075A (de) 1980-09-15
BE836589A (fr) 1976-06-14
DK146915B (da) 1984-02-06
JPS5178621A (ja) 1976-07-08
NL182689C (nl) 1988-04-18
JPS608675B2 (ja) 1985-03-05

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