发明名称 |
INFORMATION RECORDING MEDIUM, INFORMATION RECORDING DEVICE, AND INFORMATION REPRODUCTION DEVICE FOR THE SAME |
摘要 |
An optical disk is provided that disables reproduction of sub-information even if the sub-information as a contents encryption key is recorded entirely onto another optical disk. Sub-information is recorded on the optical disk by deforming a recording mark slightly in accordance with a pseudo random number sequence that is obtained using as an initial value medium ID that is read out medium inherent information. This allows sub-information inherent in a medium to be recorded, and even if the sub-information is duplicated entirely to another optical disk, the illegally duplicated sub-information cannot be reproduced because of a difference in initial value of a pseudo random number sequence between media. <IMAGE>
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申请公布号 |
EP1553568(A1) |
申请公布日期 |
2005.07.13 |
申请号 |
EP20030733245 |
申请日期 |
2003.06.02 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
YAMAOKA, MASARU;YUMIBA, TAKASHI;NAGAI, TAKAHIRO;ISHIHARA, HIDESHI |
分类号 |
G11B7/007;G11B7/013;G11B19/12;G11B20/00;G11B20/14;(IPC1-7):G11B7/007;G11B7/004;G11B20/10;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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