NETWORKED CONDITIONAL ACCESS MODULE
3 Assignments
0 Petitions
Accused Products
Abstract
A networked Conditional Access Module provided on an IEEE 1394 network, by defining a Conditional Access Module as a Conditional Access Subunit of the IEEE 1394 network, providing AV/C Conditional Access Commands to allow communication between the Conditional Access Subunit and other Subunits on the network, the Conditional Access Subunit including means to receive AV/C Conditional Access Commands over the IEEE 1394 network from another subunit, and means to transmit AV/C responses over the IEEE 1394 network in response to the received AV/C Conditional Access Commands.
31 Citations
38 Claims
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1-28. -28. (canceled)
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29. A digital television signal receiver, comprising:
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a tuner for receiving a scrambled digital television signal; an interface for outputting said scrambled digital television signal to a conditional access subunit attachable to said receiver and for inputting a local scrambled digital television signal from said conditional access subunit; a local descrambler for descrambling said locally scrambled digital television signal received from said conditional access subunit; and a demultiplexer for receiving and demultiplexing said local descrambled digital television signal. - View Dependent Claims (30, 31)
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32. A conditional access subunit attachable to a digital television signal receiver, comprising:
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an interface for inputting a scrambled digital television signal from said receiver; a descrambler for descrambling said inputted scrambled digital television signal; a local scrambler for locally scrambling said descrambled digital television signal and for outputting said locally scrambled digital television signal to said digital television signal receiver through said interface; and an authenticator for authenticating said digital television signal receiver. - View Dependent Claims (33, 34)
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35. A digital television signal receiving system, comprising:
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a tuner for receiving a scrambled digital television signal; an interface for outputting said scrambled digital television signal to a conditional access subunit attachable to a digital television receiver and for inputting a local scrambled digital television signal from said conditional access subunit; a local descrambler for descrambling said locally scrambled digital television signal received from said conditional access subunit; and a demultiplexer for receiving and demultiplexing said local descrambled digital television signal; and a conditional access subunit attachable to said digital television receiver, comprising; an interface for inputting a scrambled digital television signal from said receiver; a descrambler for descrambling said inputted scrambled digital television signal; a local scrambler for locally scrambling said descrambled digital television signal and for outputting said locally scrambled digital television signal to said digital television signal receiver through said interface; and an authenticator for authenticating the digital television signal receiver.
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36. A method of descrambling digital television signals, comprising the steps of:
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receiving a scrambled digital television signal by a receiver; outputting said received scrambled digital television, signal to a conditional access subunit attachable to said receiver; descrambling said scrambled digital television signal by said conditional access subunit; locally scrambling said descrambled digital television signal by said conditional access subunit; outputting the locally scrambled digital television signal from said conditional access subunit to said receiver; locally descrambling said locally scrambled digital television signal received from said conditional access sub-unit by said receiver; and demultiplexing said locally descrambled digital television signal. - View Dependent Claims (37, 38)
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Specification