RECORDING MEDIUM AND PRODUCING METHOD THEREOF, REPRODUCING METHOD AND REPRODUCING APPARATUS, AND COPYRIGHT MANAGING METHOD
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United States of America Patent
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Issued Date -
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app pub date -
Feb 27, 2014
filing date -
Mar 20, 2003
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A GUID as title information and a global serial number are recorded in a BCA of a digital video disc. A hash value of the GUID is embedded as an electronic watermark in a data area. When content data is reproduced from the digital video disc, a match of information of the two GUIDs is checked so as to prevent the digital video disc from being illegally copied. A lead-in area and a managing organization provide disc revocation lists. With a global serial number and a disc revocation list, content data can be prevented from being reproduced from an illegally distributed disc. A film WM detector detects data embedded in a movie shown in a theater so as to prevent content data from being reproduced from a disc on which the embedded data is recorded. Thus, content data can be prevented from being reproduced from an illegally distributed disc before a copyright supervisor of the content authorizes the disc to be distributed.
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