Catv system in which chanel selection signal is transmitted from the subscriber location
First Claim
1. A CATV system for distributing and transmitting signals of a plurality of channels to a plurality of subscribers, said system comprising:
- a center station for generating the signals of the plurality of channels;
a plurality of subscriber'"'"'s receiving devices respectively provided for said plurality of terminals;
a plurality of subscriber'"'"'s transmitting devices corresponding to said plurality of subscriber'"'"'s receiving devices, wherein said plurality of subscriber'"'"'s transmitting devices independently transmits requests to receive predetermined channels from the plurality of channels, as up-signals by radio frequencies; and
a selective distribution station, interposed between said center station and said plurality of subscriber'"'"'s receiving devices, for selectively distributing and transmitting the signals for the requested channels generated in said center station and requested by said subscriber'"'"'s transmitting devices, wherein the signals for the requested channels are received by respective ones of said plurality of subscriber'"'"'s receiving devices.
1 Assignment
0 Petitions
Accused Products
Abstract
A center station 1 generates an all-channel signal 2 obtained by multiplexing signals on all channels, and transmits the signals to a selective distribution station 10 through 1 wire transmission line such as an optical fiber. Subscribers'"'"' transmitting devices 401 to 40N transmit requests for channels to be received by corresponding subscribers'"'"' receiving devices 301 to 30N to the selective distribution station 10 in a radio transmission system. The selective distribution station 10 selects the signals on the channels requested from the all-channel signal 2 in response to requests to receive channels serving as up-signals transmitted in a radio transmission system from the subscribers'"'"' transmitting devices 401 to 40N, and distributes and transmits the selected signals to the subscribers'"'"' receiving devices 301 to 30N as down-signals.
24 Citations
19 Claims
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1. A CATV system for distributing and transmitting signals of a plurality of channels to a plurality of subscribers, said system comprising:
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a center station for generating the signals of the plurality of channels; a plurality of subscriber'"'"'s receiving devices respectively provided for said plurality of terminals; a plurality of subscriber'"'"'s transmitting devices corresponding to said plurality of subscriber'"'"'s receiving devices, wherein said plurality of subscriber'"'"'s transmitting devices independently transmits requests to receive predetermined channels from the plurality of channels, as up-signals by radio frequencies; and a selective distribution station, interposed between said center station and said plurality of subscriber'"'"'s receiving devices, for selectively distributing and transmitting the signals for the requested channels generated in said center station and requested by said subscriber'"'"'s transmitting devices, wherein the signals for the requested channels are received by respective ones of said plurality of subscriber'"'"'s receiving devices. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification