ES443805A1 - Signal distribution device for a cable television network - Google Patents

Signal distribution device for a cable television network

Info

Publication number
ES443805A1
ES443805A1 ES443805A ES443805A ES443805A1 ES 443805 A1 ES443805 A1 ES 443805A1 ES 443805 A ES443805 A ES 443805A ES 443805 A ES443805 A ES 443805A ES 443805 A1 ES443805 A1 ES 443805A1
Authority
ES
Spain
Prior art keywords
switches
line
distribution device
cable television
programs
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
Application number
ES443805A
Other languages
Spanish (es)
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.)
Oak Holland BV
Original Assignee
Oak 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 Oak Holland BV filed Critical Oak Holland BV
Publication of ES443805A1 publication Critical patent/ES443805A1/en
Expired 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)

Abstract

A signal distribution device for a cable television network having a supply line, by means of which a plurality of television programs and radio programs in multiplexing of frequencies are transmitted to a plurality of distribution lines to subscribers, characterized by one or a plurality of high-frequency switches, by means of which said programs can be remotely switched and/or interfered with, of which switches for each subscriber line one is interleaved in series and/or one or a plurality are taken in cooperation with that line; a data receiver and logic control unit which, after decoding the appropriate codes, switches the serial switch (or switches) for transmission of the high frequency program signals and/or the switch (or switches)) that cooperate with the line (or lines) to interfere with certain high frequency signals. (Machine-translation by Google Translate, not legally binding)
ES443805A 1974-12-24 1975-12-23 Signal distribution device for a cable television network Expired ES443805A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7416880A NL182689C (en) 1974-12-24 1974-12-24 SIGNAL DISTRIBUTION DEVICE FOR A HIGH-FREQUENT CABLE NETWORK.

Publications (1)

Publication Number Publication Date
ES443805A1 true ES443805A1 (en) 1977-04-16

Family

ID=19822721

Family Applications (1)

Application Number Title Priority Date Filing Date
ES443805A Expired ES443805A1 (en) 1974-12-24 1975-12-23 Signal distribution device for a cable television network

Country Status (13)

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

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 (en) * 1976-08-06 1987-02-27 Stern Joseph IMPROVEMENTS RELATING TO OR RELATING TO CABLE TELEVISION DEVICES
DE2725250C3 (en) * 1977-06-03 1982-03-18 Siemens AG, 1000 Berlin und 8000 München Cable television system with subscriber connections that can be switched off
DE3045512C2 (en) * 1980-12-03 1982-10-07 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Electronic switching device for television and audio broadcast programs
JPS58221577A (en) * 1982-06-18 1983-12-23 Yagi Antenna Co Ltd Distributing system of catv signal
JPS5921187A (en) * 1982-07-27 1984-02-03 Uro Denshi Kogyo Kk Branching distributor of common reception of wire broadcasting
US4521809A (en) * 1982-12-29 1985-06-04 North American Philips Corporation Method and apparatus for controlling access to selected television programs
ATE33327T1 (en) * 1983-06-10 1988-04-15 Tocom MAIN/SUB CONVERSION SYSTEM.
GB2161679B (en) * 1984-07-06 1988-02-24 Cabletime Ltd Improvements in or relating to signal jamming apparatuses for frequency division multiplex systems
FR2615342B1 (en) * 1987-05-13 1991-09-13 Applic Realisa Electro TELEVISION SYSTEM INCLUDING AT LEAST ONE TELEVISION CHANNEL
DE3840254C1 (en) * 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
GB1507859A (en) 1978-04-19
ATA955075A (en) 1980-09-15
NL7416880A (en) 1976-06-28
DK146915B (en) 1984-02-06
JPS608675B2 (en) 1985-03-05
FI753640A (en) 1976-06-25
FI67006C (en) 1984-12-10
FR2296335A1 (en) 1976-07-23
NL182689B (en) 1987-11-16
JPS5178621A (en) 1976-07-08
SE420036B (en) 1981-09-07
NL182689C (en) 1988-04-18
DK146915C (en) 1984-07-16
CA1033053A (en) 1978-06-13
IT1052630B (en) 1981-07-20
FR2296335B3 (en) 1980-06-20
FI67006B (en) 1984-08-31
SE7514561L (en) 1976-06-25
BE836589A (en) 1976-06-14
DE2558147A1 (en) 1976-07-01
AT361996B (en) 1981-04-10
DK586075A (en) 1976-06-25

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