发明名称 |
Data recording medium and reproducing apparatus thereof |
摘要 |
In a recordable data storage medium on which property data was recorded after having been modulated and on which data that is decodable by a cryptographic key to be generated from the property data was recorded, the property data was preferably modulated by a different method from that applied to a read-only data storage medium. Then, an optical disc drive, having no ability to distinguish the recordable data storage medium from the read-only data storage medium, cannot read the recordable data storage medium. Consequently, a greater number of drives should be equipped with the function of recognizing the type of a given data storage medium and the copyright protection function should be consolidated. <IMAGE> |
申请公布号 |
AU5877001(A) |
申请公布日期 |
2001.11.26 |
申请号 |
AU20010058770 |
申请日期 |
2001.05.17 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
YOSHIHIRO KANDA;YOSHIHISA FUKUSHIMA;MASARU ODAGIRI |
分类号 |
G11B7/007;G11B19/12;G11B20/00;G11B20/12 |
主分类号 |
G11B7/007 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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