Read-only recording medium containing sample data and reproducing method thereof
First Claim
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1. An operating method of a reproducing device for reproducing digital content, comprising:
- (a) reading by the reproducing device a position information describing where a plurality of sample data are present in digital data, the digital data including a plurality of encrypted digital contents and the plurality of sample data, the plurality of sample data corresponding respectively to the plurality of digital contents, each sample data being same as a portion of the corresponding digital content and being non-encrypted; and
(b) reproducing by the reproducing device at least one sample data based on the read position information without using a key information, the key information required for decrypting the corresponding encrypted digital content,wherein the position information indicates one of a start position and an end position where each of the sample data is present in the digital data.
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Abstract
The present invention provides according to an embodiment a method of reproducing digital content, comprising the steps of: (a) reading a position information where a sample data is present, the sample data being same as a portion of digital content and not encrypted; and (b) reproducing the sample data based on the read position information without a key information, the key information required for decrypting an encrypted digital content.
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Citations
16 Claims
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1. An operating method of a reproducing device for reproducing digital content, comprising:
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(a) reading by the reproducing device a position information describing where a plurality of sample data are present in digital data, the digital data including a plurality of encrypted digital contents and the plurality of sample data, the plurality of sample data corresponding respectively to the plurality of digital contents, each sample data being same as a portion of the corresponding digital content and being non-encrypted; and (b) reproducing by the reproducing device at least one sample data based on the read position information without using a key information, the key information required for decrypting the corresponding encrypted digital content, wherein the position information indicates one of a start position and an end position where each of the sample data is present in the digital data. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An apparatus for reproducing digital content, comprising:
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a memory to store digital data, the digital data including a plurality of encrypted digital contents and a plurality of sample data, the plurality of sample data corresponding respectively to the plurality of digital contents, each sample data being same as a portion of the corresponding digital content and being non-encrypted; and a controller to read a position information describing where the plurality of sample data are present, and controlling a reproduction of the sample data based on the read position information without using a key information, the key information required for decrypting the corresponding encrypted digital content, wherein the position information indicates one of a start position and an end position where each of the sample data is present in the digital data. - View Dependent Claims (8, 9, 10)
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11. A reproducing device-readable storage medium having embodied thereon a data structure for managing a reproduction of the storage medium via a reproducing device, wherein the data structure comprises a plurality of encrypted digital contents, a plurality of sample data corresponding respectively to the plurality of digital contents, and a position information describing where the plurality of sample data are present, each sample data being same as a portion of the corresponding digital content and being non-encrypted,
wherein the position information indicates one of a start position and an end position where each of the sample data is present in the digital data, and at least one of the plurality of the sample data is reproducible via the reproducing device without using a key information required for decrypting the plurality of the encrypted digital contents.
Specification