ES476249A1 - Sistema de difusion por cable. - Google Patents

Sistema de difusion por cable.

Info

Publication number
ES476249A1
ES476249A1 ES476249A ES476249A ES476249A1 ES 476249 A1 ES476249 A1 ES 476249A1 ES 476249 A ES476249 A ES 476249A ES 476249 A ES476249 A ES 476249A ES 476249 A1 ES476249 A1 ES 476249A1
Authority
ES
Spain
Prior art keywords
change
selector
broadcasting systems
cable
wired broadcasting
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
ES476249A
Other languages
English (en)
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 ES476249A1 publication Critical patent/ES476249A1/es
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
    • H04N7/17345—Control of the passage of the selected programme
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/22—Adaptations for optical transmission
    • 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)
  • Optical Communication System (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

Sistema de difusión por cable que comprende por lo menos un cambio de programa en el que se dispone de señales de televisión y una serie de unidades de abonado, cada una de ellas conectada a un respectivo selector de programas existente en el citado cambio y provista de medios para controlar dicho selector, en el que la unidad de abonado está conectada al referido cambio mediante un cable que incorpora por lo menos una fibra óptica para transmitir señales de televisión a tal unidad desde el mencionado cambio y por lo menos un conductor eléctrico para transportar señales de control del selector desde la unidad de abonado al citado cambio.
ES476249A 1978-01-23 1978-12-21 Sistema de difusion por cable. Expired ES476249A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2572/78A GB1586543A (en) 1978-01-23 1978-01-23 Wired broadcasting systems

Publications (1)

Publication Number Publication Date
ES476249A1 true ES476249A1 (es) 1979-05-16

Family

ID=9741939

Family Applications (1)

Application Number Title Priority Date Filing Date
ES476249A Expired ES476249A1 (es) 1978-01-23 1978-12-21 Sistema de difusion por cable.

Country Status (12)

Country Link
JP (1) JPS54116105A (es)
AU (1) AU4254878A (es)
BE (1) BE873611A (es)
DE (1) DE2900813A1 (es)
ES (1) ES476249A1 (es)
FR (1) FR2415404A1 (es)
GB (1) GB1586543A (es)
IL (1) IL56182A0 (es)
IT (1) IT1158175B (es)
NL (1) NL7900520A (es)
SE (1) SE7900540L (es)
ZA (1) ZA787225B (es)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2951495A1 (de) 1979-12-20 1981-07-02 Siemens AG, 1000 Berlin und 8000 München Breitband-fernmeldesystem
DE3013533A1 (de) * 1980-04-08 1981-10-15 Siemens Ag Schaltungsanordnung mit einer laserdiode zur uebertragung von nachrichtensiglnalen ueber einen lichtwellenleiter
DE3224406A1 (de) * 1981-07-01 1983-01-20 Canon K.K., Tokyo Bilduebertragungssystem
MY112412A (en) * 1993-10-14 2001-06-30 Nuchem Australia Pty Ltd Multimedia enabled network.
GB2296169A (en) * 1994-12-14 1996-06-19 Metrovideo Ltd Video transmission systems

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1306366A (es) * 1969-05-22 1973-02-07
GB1486421A (en) * 1973-12-03 1977-09-21 Communications Patents Ltd Broadcast relay systems
FR2271727A1 (en) * 1974-02-06 1975-12-12 Radio Diffusion Tv Francaise Cable television distribution system - has separate return channel from subscriber on telephone line to reduce noise
DE2603644C3 (de) * 1976-01-30 1980-02-28 Siemens Ag, 1000 Berlin Und 8000 Muenchen Gemeinschaftsantennenanlage

Also Published As

Publication number Publication date
SE7900540L (sv) 1979-07-24
IL56182A0 (en) 1979-03-12
DE2900813A1 (de) 1979-07-26
BE873611A (fr) 1979-05-16
JPS54116105A (en) 1979-09-10
AU4254878A (en) 1979-08-02
IT1158175B (it) 1987-02-18
NL7900520A (nl) 1979-07-25
ZA787225B (en) 1979-12-27
FR2415404A1 (fr) 1979-08-17
GB1586543A (en) 1981-03-18
IT7852382A0 (it) 1978-12-20

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