ES435664A1 - Wired broadcasting systems - Google Patents
Wired broadcasting systemsInfo
- Publication number
- ES435664A1 ES435664A1 ES435664A ES435664A ES435664A1 ES 435664 A1 ES435664 A1 ES 435664A1 ES 435664 A ES435664 A ES 435664A ES 435664 A ES435664 A ES 435664A ES 435664 A1 ES435664 A1 ES 435664A1
- Authority
- ES
- Spain
- Prior art keywords
- frequency
- subscriber
- cable
- signals
- sources
- 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
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
- H04N7/17354—Control of the passage of the selected programme in an intermediate station common to a plurality of user terminals
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Details Of Television Systems (AREA)
- Telephonic Communication Services (AREA)
- Mobile Radio Communication Systems (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Interface Circuits In Exchanges (AREA)
Abstract
Improvements in cable broadcasting systems, comprising a broadband coaxial cable for transporting multi-channel program signals from one program source or sources to a plurality of exchanges with each of which a plurality of units are connected subscriber, the program source or sources being provided to apply the signals to the cable stacked one on top of the other in frequency, and each exchange with respect to each subscriber comprising a switchable frequency translator to selectively translate any one of said stacked frequency signals to a different predetermined frequency for the reception of which the subscriber unit is prepared, controllable switching means from the respective subscriber unit to selectively switch the frequency translator, and an output circuit intended to apply the other aforementioned predetermined frequency signal to a cable power with which you are subscriber connected. (Machine-translation by Google Translate, not legally binding)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB11791/74A GB1480749A (en) | 1974-03-16 | 1974-03-16 | Wired broadcasting systems |
Publications (1)
Publication Number | Publication Date |
---|---|
ES435664A1 true ES435664A1 (en) | 1976-12-01 |
Family
ID=9992776
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES435664A Expired ES435664A1 (en) | 1974-03-16 | 1975-03-15 | Wired broadcasting systems |
Country Status (13)
Country | Link |
---|---|
JP (1) | JPS50133701A (en) |
BE (1) | BE826763A (en) |
CA (1) | CA1052446A (en) |
CH (1) | CH589981A5 (en) |
DE (1) | DE2510865C3 (en) |
ES (1) | ES435664A1 (en) |
FR (1) | FR2264447B1 (en) |
GB (1) | GB1480749A (en) |
IL (1) | IL46827A (en) |
IT (1) | IT1032322B (en) |
NL (1) | NL183694B (en) |
SE (1) | SE407002B (en) |
ZA (1) | ZA751615B (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4135157A (en) * | 1977-03-28 | 1979-01-16 | Oak Industries Inc. | Pole mounted converter |
DE2807986A1 (en) * | 1978-02-22 | 1979-08-30 | Hertz Inst Heinrich | SYSTEM FOR INTERACTIVE CABLE TV |
CA1142244A (en) * | 1979-08-22 | 1983-03-01 | Eric J. Gargini | Wired broadcasting system with subscriber controlled switched programme selection |
DE2951512A1 (en) * | 1979-12-20 | 1981-07-02 | Siemens AG, 1000 Berlin und 8000 München | BROADBAND SWITCHING SYSTEM |
FR2515400A1 (en) * | 1981-10-26 | 1983-04-29 | Visiodis Sa | FDM system for remote control of surveillance cameras - uses frequency converters at remotely controlled concentrator for transposed base band signals |
GB2127257A (en) * | 1982-08-17 | 1984-04-04 | Visionhire Cable Limited | Distribution apparatus |
DE3301208A1 (en) * | 1983-01-15 | 1984-07-26 | ANT Nachrichtentechnik GmbH, 7150 Backnang | Broadband switching network |
FI19992812A (en) * | 1999-12-29 | 2001-06-30 | Helsingin Puhelin Oyj | Method of increasing the data transmission capacity of a data transmission network, such as a cable TV network |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3073906A (en) * | 1959-06-16 | 1963-01-15 | Bell Telephone Labor Inc | Line concentrating telephone system |
BE632218A (en) * | 1963-05-31 | |||
GB1272594A (en) * | 1968-08-09 | 1972-05-03 | Communications Patents Ltd | Improvements in and relating to wired broadcasting systems |
-
1974
- 1974-03-16 GB GB11791/74A patent/GB1480749A/en not_active Expired
-
1975
- 1975-03-12 CH CH311175A patent/CH589981A5/xx not_active IP Right Cessation
- 1975-03-13 DE DE2510865A patent/DE2510865C3/en not_active Expired
- 1975-03-13 CA CA221,995A patent/CA1052446A/en not_active Expired
- 1975-03-13 SE SE7502806A patent/SE407002B/en not_active IP Right Cessation
- 1975-03-13 IL IL46827A patent/IL46827A/en unknown
- 1975-03-14 FR FR7508819A patent/FR2264447B1/fr not_active Expired
- 1975-03-14 NL NLAANVRAGE7503107,A patent/NL183694B/en not_active Application Discontinuation
- 1975-03-14 IT IT48621/75A patent/IT1032322B/en active
- 1975-03-14 ZA ZA00751615A patent/ZA751615B/en unknown
- 1975-03-15 ES ES435664A patent/ES435664A1/en not_active Expired
- 1975-03-17 BE BE154398A patent/BE826763A/en not_active IP Right Cessation
- 1975-03-17 JP JP50031230A patent/JPS50133701A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
IL46827A0 (en) | 1975-05-22 |
ZA751615B (en) | 1976-02-25 |
SE407002B (en) | 1979-03-05 |
IT1032322B (en) | 1979-05-30 |
NL183694B (en) | 1988-07-18 |
NL7503107A (en) | 1975-09-18 |
DE2510865A1 (en) | 1975-09-18 |
IL46827A (en) | 1977-07-31 |
FR2264447A1 (en) | 1975-10-10 |
DE2510865C3 (en) | 1983-11-10 |
CH589981A5 (en) | 1977-07-29 |
DE2510865B2 (en) | 1978-12-14 |
JPS50133701A (en) | 1975-10-23 |
CA1052446A (en) | 1979-04-10 |
BE826763A (en) | 1975-07-16 |
FR2264447B1 (en) | 1981-07-24 |
SE7502806L (en) | 1975-09-17 |
GB1480749A (en) | 1977-07-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FD1A | Patent lapsed |
Effective date: 19971103 |