Recorder/Reproducer and Content Data Protection System
First Claim
1. A recorder/reproducer, comprising:
- a content data moving unit operable to;
write a second content data into a second recording medium that is different from a first recording medium, the second content data being obtained by re-coding a first content data recorded in the first recording medium;
write a first partial information extracted from the first content data into the second recording medium; and
make the first content data irreproducible, using a first invalidated partial information corresponding to the extracted first partial information; and
a content data restoration unit operable to make the irreproducible first content data reproducible, using the first partial information recorded in the second recording medium.
3 Assignments
0 Petitions
Accused Products
Abstract
The recorder/reproducer (101), when moving a first content data, writes a second content data, which is obtained by re-coding the first content data recorded in a first recording medium, into a second recording medium instead of the first content data, writes one or more first partial information extracted from the first content data into the second recording medium, and makes the first content data irreproducible, using one or more first invalidated partial information having one-to-one correspondence with the extracted one or more first partial information. When restoring the first content data, it makes the irreproducible first content data reproducible, using the one or more first partial information recorded in the second recording medium.
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Citations
24 Claims
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1. A recorder/reproducer, comprising:
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a content data moving unit operable to; write a second content data into a second recording medium that is different from a first recording medium, the second content data being obtained by re-coding a first content data recorded in the first recording medium; write a first partial information extracted from the first content data into the second recording medium; and make the first content data irreproducible, using a first invalidated partial information corresponding to the extracted first partial information; and a content data restoration unit operable to make the irreproducible first content data reproducible, using the first partial information recorded in the second recording medium. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A recording/reproduction method comprising:
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a content data moving step of; writing a second content data into a second recording medium that is different from a first recording medium, the second content data being obtained by re-coding a first content data recorded in the first recording medium; writing a first partial information extracted from the first content data into the second recording medium; and making the first content data irreproducible, using a first invalidated partial information corresponding to the extracted first partial information; and a content data restoration step of making the irreproducible first content data reproducible, using the first partial information recorded in the second recording medium.
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23. A recording/reproduction program causing a computer system to execute:
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a content data moving step of; writing a second content data into a second recording medium that is different from a first recording medium, the second content data being obtained by re-coding a first content data recorded in the first recording medium; writing a first partial information extracted from the first content data into the second recording medium; and making the first content data irreproducible, using a first invalidated partial information corresponding to the extracted first partial information; and a content data restoration step of making the irreproducible first content data reproducible, using the first partial information recorded in the second recording medium.
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24. A semiconductor device comprising:
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a content data moving unit operable to; write a second content data into a second recording medium that is different from a first recording medium, the second content data being obtained by re-coding a first content data recorded in the first recording medium; write a first partial information extracted from the first content data into the second recording medium; and make the first content data irreproducible, using a first invalidated partial information corresponding to the extracted first partial information; and a content data restoration unit operable to make the irreproducible first content data reproducible, using the first partial information recorded in the second recording medium.
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Specification