发明名称 |
METHOD OF MANAGING COPY PROTECTION INFORMATION OF A RECORDING MEDIUM, RECORDING MEDIUM WITH COPY PROTECTION INFORMATION FOR CONTENTS RECORDED THEREON, AND REPRODUCING METHOD FOR THE RECORDING MEDIUM |
摘要 |
The present invention relates to a method of managing CPI (Copy Protection Information) for preventing unauthorized copy of encrypted content recorded on a high-density recording medium such as a BD-ROM (Blu-ray Disc ROM). In the present method, when main content data is recorded in encrypted manner, CPI that is necessary to decrypt the encrypted main content data is written in a predetermined PIC area and is also copied at least once in an area other than the PIC area.
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申请公布号 |
CA2487408(C) |
申请公布日期 |
2012.10.23 |
申请号 |
CA20042487408 |
申请日期 |
2004.01.24 |
申请人 |
LG ELECTRONICS INC. |
发明人 |
SUH, SANG WOON;KIM, JIN YONG |
分类号 |
G11B20/10;G11B19/12;G11B20/00 |
主分类号 |
G11B20/10 |
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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