ES408940A1 - Wired broadcasting systems - Google Patents

Wired broadcasting systems

Info

Publication number
ES408940A1
ES408940A1 ES408940A ES408940A ES408940A1 ES 408940 A1 ES408940 A1 ES 408940A1 ES 408940 A ES408940 A ES 408940A ES 408940 A ES408940 A ES 408940A ES 408940 A1 ES408940 A1 ES 408940A1
Authority
ES
Spain
Prior art keywords
frequency
subscriber
station
central
pair
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
ES408940A
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.)
Communications Patents Ltd
Original Assignee
Communications Patents Ltd
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 Communications Patents Ltd filed Critical Communications Patents Ltd
Publication of ES408940A1 publication Critical patent/ES408940A1/en
Expired 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
    • H04N7/173—Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal
    • H04N7/17309—Transmission or handling of upstream communications
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/173—Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal
    • H04N2007/17372—Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal the upstream transmission being initiated or timed by a signal from upstream of the user terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/173—Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal
    • H04N2007/1739—Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal the upstream communication being transmitted via a separate link, e.g. telephone line

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Telephonic Communication Services (AREA)
  • Radio Relay Systems (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

A conductor broadcast system in which each of a group of subscriber stations is connected to a program sub-station through a signal circuit comprising a twisted pair of conductors suitable for the transmission of high-frequency television signals and which has associated with it an interstitial pair of conductors suitable for the transmission of audio-frequency and control signals to control switching means in the program substation, whereby a subscriber can apply to his pair of high-frequency conductors any of a number of programs and in which a central information processing equipment is coupled through the video transmission circuits with the subscriber station, means being associated with the subscriber stations for response to information or data received from said central equipment and being provided means to return information or data to the central station of treatment. (Machine-translation by Google Translate, not legally binding)
ES408940A 1971-11-25 1972-11-24 Wired broadcasting systems Expired ES408940A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5482271A GB1412586A (en) 1971-11-25 1971-11-25 Wired broadcasting systems

Publications (1)

Publication Number Publication Date
ES408940A1 true ES408940A1 (en) 1975-10-16

Family

ID=10472182

Family Applications (1)

Application Number Title Priority Date Filing Date
ES408940A Expired ES408940A1 (en) 1971-11-25 1972-11-24 Wired broadcasting systems

Country Status (14)

Country Link
JP (1) JPS4864802A (en)
AU (1) AU467268B2 (en)
BE (1) BE791941A (en)
CH (1) CH552316A (en)
DE (1) DE2257644C3 (en)
ES (1) ES408940A1 (en)
FR (1) FR2161122B1 (en)
GB (1) GB1412586A (en)
IL (1) IL40808A (en)
IT (1) IT973721B (en)
MT (1) MTP730B (en)
NL (1) NL7215797A (en)
SE (1) SE387027B (en)
ZA (1) ZA728024B (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2917978C2 (en) * 1979-05-04 1983-12-22 Volker Joachim 4400 Münster Remme Cable communication system
EP0093205B1 (en) * 1982-04-29 1985-11-13 Deltakabel B.V. System for transmitting programme or data signals
GB2164229B (en) * 1982-05-14 1986-08-20 Communications Patents Ltd Communications system
GB2121656B (en) * 1982-05-14 1986-08-20 Communications Patents Ltd Communications system
US4605958A (en) * 1983-04-14 1986-08-12 Control Data Corporation Method and apparatus for detecting the channel to which an electronic receiver system is tuned
US4789860A (en) * 1985-03-12 1988-12-06 U.S. Philips Corp. Interface between a receiver and a sub-system
US4896209A (en) * 1987-02-10 1990-01-23 Sony Corporation Passenger vehicle polling system having a central unit for polling passenger seat terminal units

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1409479A (en) * 1963-07-24 1965-08-27 Skiatron Elect & Tele slave transceivers called transponders retransmitting signals produced by the central station

Also Published As

Publication number Publication date
DE2257644A1 (en) 1973-05-30
AU4920072A (en) 1974-05-23
BE791941A (en) 1973-03-16
DE2257644B2 (en) 1979-05-17
IL40808A0 (en) 1973-01-30
JPS4864802A (en) 1973-09-07
MTP730B (en) 1973-08-10
SE387027B (en) 1976-08-23
CH552316A (en) 1974-07-31
IT973721B (en) 1974-06-10
NL7215797A (en) 1973-05-29
AU467268B2 (en) 1975-11-27
FR2161122B1 (en) 1978-03-03
IL40808A (en) 1976-08-31
GB1412586A (en) 1975-11-05
ZA728024B (en) 1973-07-25
FR2161122A1 (en) 1973-07-06
DE2257644C3 (en) 1980-01-17

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