Method and apparatus for copy protection
First Claim
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1. A method of copy protecting a content comprising:
- encoding a watermark in the content, wherein the watermark is not significantly discernible by a recipient of the content, the watermark being indicative of a copy protection status of the content.
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Abstract
Copy protection techniques that utilize a watermark and a permission key are disclosed. The copy protection techniques can provide single-copy copy protection in addition to different levels of copy protection. The permission key and the watermark can also permit the invention to yield variable levels of copy protection. In one embodiment, content including a watermark is transmitted to a recipient. The recipient is allowed to read the content but not record the content unless the recipient possesses a permission key.
138 Citations
34 Claims
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1. A method of copy protecting a content comprising:
encoding a watermark in the content, wherein the watermark is not significantly discernible by a recipient of the content, the watermark being indicative of a copy protection status of the content. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A copy protection compatible recording device that is configured to record content on a recording medium, said copy protection compatible recording device comprising:
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a controller that is configured to receive the content and determine a watermark within the content; and
a recording mechanism coupled to the controller, the recording mechanism receiving the content from the controller and records the content on the recording medium, wherein the controller controls the recording of the content on the recording medium by the recording mechanism based on the watermark. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. A receiver for receiving copy protected content over a transmission medium, wherein the content includes an embedded watermark, wherein a permission key is also received over the transmission medium with the content, the receiver comprising:
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a decoder that receives the content over the transmission medium and decodes the content;
a permission key extractor coupled to the decoder, wherein the permission key extractor separates a permission key from the content, wherein the content and the permission are provided to a copy protection compatible recording device. - View Dependent Claims (20, 21, 22)
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23. A method of copy protecting content comprising:
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receiving content to be recorded, the content including a watermark encoded in the content and the watermark indicating that the content is copy protected;
receiving a permission key;
extracting the watermark from the content;
comparing the permission key and the watermark to determine if the permission key and the watermark match; and
permitting the recording of the content if the permission key and the watermark match and otherwise prohibiting the recording of the content. - View Dependent Claims (24, 25, 26, 27, 28)
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29. A copy protection compatible recording medium, wherein the recording medium comprises:
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a content recorded on the recording medium;
a watermark embedded in the content, wherein the watermark indicates that the content is copy protected. - View Dependent Claims (30, 31)
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32. A computer readable medium including computer program code for copy protecting content, said computer readable medium comprising:
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computer program code configured to receive content to be recorded, the content including a watermark encoded in the content and the watermark indicating that the content is copy protected;
computer program code configured to receive a permission key;
computer program code configured to extract the watermark from the content;
computer program code configured to compare the permission key and the watermark to determine if the permission key and the watermark match; and
computer program code configured to permit the recording of the content if the permission key and the watermark match and otherwise prohibiting the recording of the content. - View Dependent Claims (33, 34)
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Specification