Copy protection
First Claim
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1. A method of copy protection in a cable broadcast receiver, the method comprising the steps of:
- receiving a multi-stream broadcast signal;
assigning a unique stream identifier to each stream of the multi-stream broadcast signal;
receiving copy control information to which the stream identifier is assigned;
matching the stream and the copy control information using the stream identifier;
storing the matched copy control information; and
controlling an output of a broadcast stream using a value of the stored copy control information.
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Abstract
An apparatus for copy protection in a cable broadcast receiver and method thereof are disclosed, by which digital broadcast contents can be protected from being copied.
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Citations
20 Claims
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1. A method of copy protection in a cable broadcast receiver, the method comprising the steps of:
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receiving a multi-stream broadcast signal; assigning a unique stream identifier to each stream of the multi-stream broadcast signal; receiving copy control information to which the stream identifier is assigned; matching the stream and the copy control information using the stream identifier; storing the matched copy control information; and controlling an output of a broadcast stream using a value of the stored copy control information. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A cable broadcast receiver, which receives a multi-stream broadcast signal, the cable broadcast receiver comprising:
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a broadcast receiving unit receiving a multi-stream broadcast signal; a CAS module unit assigning a unique stream identifier to each stream of the received multi-stream broadcast signal; and a control unit controlling copy control information matched to the stream identifier assigned to the stream to be stored, the control unit controlling an output of a broadcast stream using a value of the stored copy control information. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A copy protection system receiving a multi-stream broadcast signal, comprising:
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a host receiving the multi-stream broadcast signal, the host assigning a unique stream identifier to a header of a received multi-stream per stream; and a cable card receiving the multi-stream to which the stream identifier is assigned from the host, the cable card storing header information of the stream, the cable card assigning the stored header information to copy control information, the cable card conveying the copy control information to the host, wherein the host stores the copy control information and the stream to which the same stream identifier is assigned and then controls an output of the stream using the copy control information matched to the stream identifier. - View Dependent Claims (17, 18, 19, 20)
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Specification