发明授权
- 专利标题： Information recording medium capable of being tested for authenticity
- 专利标题（中）： 信息记录介质能够进行真实性测试
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申请号： US09039611申请日： 1998-03-16
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公开(公告)号： US06324157B1公开(公告)日： 2001-11-27
- 发明人: Seigo Kotani
- 申请人： Seigo Kotani
- 优先权： JP9-253918 19970918
- 主分类号： G11B724
- IPC分类号： G11B724
摘要：
The recording/reproducing apparatus of the invention can discriminate an illegally copied information recording medium by reading an irreversible area from the information recording medium on the basis of judgement on presence of irreversible data. The information recording medium of the invention includes a buffer area which is not affected by heat used in recording the irreversible data, and the judgement is obtained with the buffer area excluded. Therefore, a mistake in judging whether or not the irreversible data is recorded in the loaded information recording medium can be avoided.
信息查询
