Video line card switch for use in a video line card shelf in a switched video system
AssigneeAlcatel Network Systems, Inc.
InventorsLarry W. Burton, Todd D. Poston
Life of this patent
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Abstract
In a telecommunications system providing switched video services, a video line card includes a switch arrangement for selecting a plurality of channels from a greater plurality of available channels and for providing said selected channels in a fixed bandwidth that may be received by a subscriber. A plurality of tuners are used to select the channels and to provide the channels on an intermediate frequency, which frequency is thereafter converted to a distribution channel frequency acceptable by the subscriber.
Claims13
A channel selection switch for selecting a selected channel having a desired program signal carried at one frequency from a plurality of available channels having different program signals carried at different frequencies, said switch comprising:
- tuner means, responsive to a tuner selection signal, for dynamically tuning to the one frequency of the selected channel for providing the desired program signal of the selected channel on an intermediate frequency;
- converter means, responsive to a converter selection signal, for dynamically converting said desired program signal of the selected channel on the intermediate frequency to a distribution channel frequency permanently assigned to a particular subscriber to differentiate the particular subscriber from other subscribers of a plurality of subscribers;
- and
- a signal processor, responsive to a dynamically selected selection signal from the particular subscriber, for providing the tuner selection signal and the converter selection signal, wherein
- said channel selection switch is among a plurality of channel selection switches located remotely from said plurality of subscribers each having different distribution frequencies assigned to them.
A video channel selection switch on a card for insertion and use in a slot of a video distribution shelf in a remote terminal connected by an optical fiber to an optical network unit that is in turn connected to one or more subscriber living units for selecting a first plurality of video channels from a second plurality of available video channels, said video channel selection switch on a card comprising:
- a first plurality of parallel tuner means, each responsive to a different one of a corresponding first plurality of tuner control signals indicative of corresponding dynamically selected channels, each tuner means for tuning to a corresponding frequency band of a dynamically selected channel to provide a program signal of the dynamically selected channel in an intermediate frequency band;
- a corresponding first plurality of converter means, each responsive to a program signal of a corresponding first plurality of dynamically selected channels in the intermediate frequency band from a corresponding tuner means and responsive to a different one of a corresponding first plurality of converter control signals, each for converting the program signal of the dynamically selected channel in the intermediate frequency band to a program signal of a distribution channel frequency band;
- a controller, responsive to dynamically selected channel selection signals from the one or more subscriber living units for providing the first plurality of tuner control signals and the first plurality of converter control signals;
- and
- means for summing the program signals of the distribution channel frequency bands from the first plurality of converter means for providing a summed signal to the optical network unit.
Dependencies are inferred from the claim text.