Method for simulcrypting scrambled data to a plurality of conditional access devices
First Claim
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1. An apparatus comprising:
- a processor to control operations of the apparatus;
an input that is to receive scrambled content;
a descrambler unit coupled to the input and to the processor, the descrambler unit descrambles the scrambled content in order to recover unscrambled content and concurrently routes the unscrambled content over a first communication link for display on a display device and routes the unscrambled content over a second communication link, wherein the descrambler unit descrambles the scrambled content by producing a first key to descramble a first control word, and thereafter, using the first control word to descramble the scrambled content and recover the unscrambled content; and
a re-scrambler unit coupled to the second communication link and to the processor, the re-scrambler unit to scramble the unscrambled content to produce re-scrambled content for transmission from the apparatus,wherein the re-scrambler unit scrambled the unscrambled content using information within an entitlement control message (ECM), the ECM being part of the program data including the scrambled content received by the input.
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Abstract
One embodiment of the invention relates to an apparatus comprising an input, a descrambler unit and a re-scrambler unit. The input is adapted to receive scrambled content. The descrambler unit is coupled to the input. The descrambler unit descrambles the scrambled content in order to recover unscrambled content and concurrently routes both the unscrambled content over a first communication link for display on a display device and the unscrambled content over a second communication link. The re-scrambler unit is coupled to the second communication link. The re-scrambler unit is adapted to scramble the unscrambled content to produce re-scrambled content for transmission.
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Citations
19 Claims
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1. An apparatus comprising:
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a processor to control operations of the apparatus; an input that is to receive scrambled content; a descrambler unit coupled to the input and to the processor, the descrambler unit descrambles the scrambled content in order to recover unscrambled content and concurrently routes the unscrambled content over a first communication link for display on a display device and routes the unscrambled content over a second communication link, wherein the descrambler unit descrambles the scrambled content by producing a first key to descramble a first control word, and thereafter, using the first control word to descramble the scrambled content and recover the unscrambled content; and a re-scrambler unit coupled to the second communication link and to the processor, the re-scrambler unit to scramble the unscrambled content to produce re-scrambled content for transmission from the apparatus, wherein the re-scrambler unit scrambled the unscrambled content using information within an entitlement control message (ECM), the ECM being part of the program data including the scrambled content received by the input. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A digital device comprising:
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a decoding unit; and a digital receiver coupled to the decoding unit, the digital receiver comprises; a processor to control operations of the digital receiver; a tuner adapted to receive an incoming digital bitstream, a demodulator unit coupled to the tuner and to the processor, the demodulator unit is to demodulate the digital bitstream to recover program data from the incoming digital bitstream, the program data including scrambled content, and a conditional access unit coupled to the demodulator unit and to the processor, the conditional access unit is to receive the program data from the demodulator unit and descramble the scrambled content to produce unscrambled content, the unscrambled content being routed via a first communication path for display on a display device and also being routed over a second communication path for re-scrambling prior to transmission from the conditional access unit, wherein the conditional access unit descrambles the scrambled content by producing a first key to descramble a first control word, and thereafter, using the first control word to descramble the scrambled content and recover the unscrambled content, and wherein the conditional access unit re-scrambles the unscrambled content using information within an entitlement control message (ECM), the ECM being part of the program data that includes the scrambled content. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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18. A system adapted to receive an incoming digital bit stream from one or more service providers with the digital bitstream including program data, the system comprising:
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a transmission medium; a hard disk recording unit coupled to the transmission medium; and a digital device coupled to the transmission medium, the digital device comprises a decoding unit; and a digital receiver coupled to the decoding unit, the digital receiver comprises a processor to control operations of the digital receiver; a tuner adapted to receive the digital bitstream, a demodulator unit coupled to the tuner and to the processor, the demodulator unit is to demodulate the digital bitstream to recover the program data, the program data including scrambled content, and a conditional access unit coupled to the demodulator unit and to the processor, the conditional access unit is to receive and descramble the scrambled content to produce unscrambled content, the descrambled content being routed over both a first communication path and a second communication path, the descrambled content over the first communication path being routed to the decoding unit for decoding of the descrambled content and subsequently displayed while the descrambled content over the second communication path being re-scrambled and transmitted to the hard disk recording unit over the transmission medium, wherein the conditional access unit descrambles the scrambled content by producing a first key to descramble a first control word, and thereafter, using the first control word to descramble the scrambled content and recover the unscrambled content, and wherein the conditional access unit re-scrambles the unscrambled content using information within an entitlement control message (ECM), the ECM being part of the program data that includes the scrambled content. - View Dependent Claims (19)
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Specification