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US 5,534,912 AGranted
Extended range video on demand distribution system
AssigneeBell Atlantic Network Services, Inc.
InventorBruce W. Kostreski
Life of this patent
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AssigneeBell Atlantic Network Services, Inc.
InventorBruce W. Kostreski
Estimating the term…
In a video on demand system utilizing asymmetric digital subscriber line (ADSL) interfaces, a plurality of video channels are arranged at a central office into ADSL format and, together with a provisioning channel, are multiplexed into a composite spectrum. This composite spectrum is then transmitted to an intermediate distribution point, remote from the central office, over analog optical fiber. The composite spectrum is split and applied individually to channel selection mixers associated with the subscribers serviced by the intermediate distribution point. Telephone signals (POTS) are combined at the intermediate distribution point into the ADSL signal and transmitted with the video, to an ADSL multiplexer/demultiplexer at the subscriber's location. In the reverse direction, channel direction/change signals are split from the composite received from the subscriber's location at the intermediate distribution point and utilized to control channel selection. Program request information is forwarded back over the optical fiber link to the central office where it is extracted at the ADSL individual channel units for use in providing video on demand service.
In a video distribution system in which video signals are distributed to end users over a telephone wiring plant of a central office using respective pairs of asymmetrical digital subscriber line (ADSL) interface units, a source side interface unit of each pair being located relatively closer to a source of video information than a subscriber side interface unit and the subscriber side interface unit of each pair being located at an end user's location, a method of improving operating characteristics of said distribution system comprising the steps of:
A method of adapting an existing telephone wiring plant of a central office used to provide telephone service to one or more subscribers over individual subscriber loops to accommodate distribution of video information, comprising:
A method of distributing video information to one or more subscriber locations over individual subscriber loops, comprising:
In a multichannel information distribution system in which only some channels are authorized for access by a subscriber and in which the subscriber controls selection of one or more particular channels to be provided to the subscriber, apparatus for channel selection comprising:
A video distribution system comprising:
In a multichannel information distribution system in which only some channels are authorized for access by a subscriber and in which the subscriber controls selection of one or more particular channels to be provided to the subscriber, apparatus for channel selection comprising:
Dependencies are inferred from the claim text.