发明名称 |
Optical disc, recording device, and recording device |
摘要 |
An optical disc storing a copyrighted digital product has a data area in which N processed parts are provided in order to certify that the stored digital product is an original one. A BCA provided on the optical disc stores judgment criteria information as well as N pieces of physical feature information. The judgment criteria information includes a numeric value N being the total number of processed parts, and a numeric value M being an integer between 0 and N inclusive and representing the security level to be assured for the digital data stored. When a numeric value P being the total number of processed parts in a normal state exceeds the numeric value M, a reproduction device reproduces the optical disc. When the numeric value P falls short of the numeric value M, the reproduction device does not reproduce the optical disc.
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申请公布号 |
US7023779(B2) |
申请公布日期 |
2006.04.04 |
申请号 |
US20020239914 |
申请日期 |
2002.09.27 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
KAWASHIMA KEIICHI;YUMIBA TAKASHI;MORIOKA KOUICHI |
分类号 |
G11B7/00;G06F1/00;G11B7/0037;G11B7/007;G11B7/013;G11B19/12;G11B20/00;G11B20/10;G11B20/12;G11B23/28 |
主分类号 |
G11B7/00 |
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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