发明授权
- 专利标题： Method and apparatus for recording and reproducing information on and from recording disc
- 专利标题（中）： 用于在记录盘上记录和再现信息的方法和装置
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申请号： US08933825申请日： 1997-09-19
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公开(公告)号： US06618335B2公开(公告)日： 2003-09-09
- 发明人: Yoshiaki Tanaka , Isao Oowaki
- 申请人： Yoshiaki Tanaka , Isao Oowaki
- 优先权： JP8-274246 19960925
- 主分类号： G11B700
- IPC分类号： G11B700
摘要：
A recording disc has a lead-in area and a data area. A scrambled version of a SID code word is read out from the lead-in area of the disc. The SID code word represents a producer of the disc. The readout scrambled version is de-scrambled to recover the SID code word. The recovered SID code word is collated with reference SID code words to decide whether or not the disc is legitimate. Main information is read out from the data area of the disc when it is decided that the disc is legitimate. Readout of the main information from the data area of the disc is inhibited when it is decided that the disc is not legitimate.
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