EP0103438A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Television and distribution network
Assignee: EMI Group Ltd
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Filing: 1983-08-30
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Granted: —
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Expires: 2003-08-30
Abstract
Abstract A cable television distribution network has a central store and control unit 1 connected to a number of main transmission lines 2 from which are tapped spurs 3 linked to domestic television receivers (of which only one, 4, is shown). In operation, the central unit 1 sends command signals in teletext format down the main transmission lines 2 to operate on either the receiver 4 or a remote device (via the receiver 4) e.g. keyboard 5, heating system 6 or security system 7; also the unit 1 can process any signals returning from receiver 4 (including any originating from the remote devices) and take appropriate action.
Inventors
- 👤 Barnard Thomas Peter Barnes
- 👤 Douglas Randall Peter Topping
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 10:11
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/16; H04N7/173; H04N7/17309; H04N7/08; H04N7/087; H04N7/088; H04N7/0888; H04N2007/17372
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
51 words
A cable television distribution network characterised by means (1) to send command signals in teletext format along a transmission line (2) to a television receiver (4), whereby, in use, said command signals initiate automatic operation of selectively the receiver (4) or a remote device (5,6,7,) in accordance with said command signals.
Claim 2
Dependent Claim
51 words
A cable television distribution network characterised by means (1) to send command signals in teletext format along a transmission line (2) to a television receiver (4), whereby, in use, said command signals initiate automatic operation of selectively the receiver (4) or a remote device (5,6,7,) in accordance with said command signals.
Claim 3
Dependent Claim
63 words
A cable television distribution network characterised by means (1) to send command signals in teletext format along a transmission line (2) to a television receiver (4), whereby in use, said receiver effects an operation or operations in accordance with said command signals and sends a signal in accordance with said command signals along the transmission line towards the source of the command signals.
Claim 4
Dependent Claim
63 words
A cable television distribution network characterised by means (1) to send command signals in teletext format along a transmission line (2) to a television receiver (4), whereby in use, said receiver effects an operation or operations in accordance with said command signals and sends a signal in accordance with said command signals along the transmission line towards the source of the command signals.
Claim 5
Dependent Claim
27 words
A network according to claim 2, characterised by the signal sent by the television receiver (4) towards the source of the command signals being in teletext format.
Claim 6
Dependent Claim
67 words
A cable television distribution network characterised by means (1) to send command signals along a transmission line to at least one television receiver (4), the command signals being in teletext format and being addressed to the at least one receiver, whereby in use the command signals initiate automatic operation of selectively the at least one receiver or a remote device (5,6,7) in accordance with said command signals.
Claim 7
Dependent Claim
67 words
A cable television distribution network characterised by means (1) to send command signals along a transmission line to at least one television receiver (4), the command signals being in teletext format and being addressed to the at least one receiver, whereby in use the command signals initiate automatic operation of selectively the at least one receiver or a remote device (5,6,7) in accordance with said command signals.
Claim 8
Dependent Claim
70 words
A television distribution network characterised by: a first part in which television display signals and/or command signals are broadcast by e.g. satellite to a distribution centre; and a second part, including a cable television distribution network according to any one of claims 1 to 4 in which television display signals and/or command signals are sent from the distribution centre (1) along a transmission line (2) to a television receiver (4).
Claim 9
Dependent Claim
17 words
A television receiver for use in a network according to any one of claims 1 to 5.
Claim 10
Dependent Claim
76 words
A television receiver characterised by means to identify command signals in teletext format which, in use, are sent along a transmission line (2) to the receiver (4), means to filter out the command signals and any associated data signals, means to make an operation or operations in accordance with the command signals and means to send a signal along the transmission line (2) in accordance with said command signals towards the source of the command signals.
Claim 11
Dependent Claim
76 words
A television receiver characterised by means to identify command signals in teletext format which, in use, are sent along a transmission line (2) to the receiver (4), means to filter out the command signals and any associated data signals, means to make an operation or operations in accordance with the command signals and means to send a signal along the transmission line (2) in accordance with said command signals towards the source of the command signals.
References Cited (Backward Citations)
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