| 摘要 |
A pay television system including a pay television network and a subscriber unit which receives pay television transmissions via the pay television network and displays the pay television transmissions on televisions coupled thereto. The subscriber unit includes at least two pay television decoders, wherein a first decoder includes a first card reader and a second decoder includes a second card reader. The system also includes a first smart card which is operative, upon insertion in a first slot in the first card reader, to activate decoding of the pay television transmissions in the first decoder and a second smart card which is operative, upon insertion in a second slot in the second card reader, to activate decoding of the pay television transmissions in the second decoder. The second smart card deactivates in accordance with predertermined criteria and reactivates upon insertion in the first slot in the first card reader after removal of the first smart card from the first card reader.
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