发明申请
- 专利标题： Optical disc device
- 专利标题（中）： 光盘设备
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申请号： US11705021申请日： 2007-02-12
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公开(公告)号： US20080159103A1公开(公告)日： 2008-07-03
- 发明人: Hiroyuki Minemura , Toshimichi Shintani
- 申请人： Hiroyuki Minemura , Toshimichi Shintani
- 优先权： JP2006-355931 20061228
- 主分类号： G11B7/00
- IPC分类号： G11B7/00
摘要：
A normal resolution component included in a readout signal of a super resolution optical disc is canceled to improve quality of the readout signal. The normal resolution component is separated from the readout signal of the super resolution optical disc by using a normal resolution selection filter such as a low pass filter, a mark length determination circuit, and then the normal resolution component is subtracted from an original readout signal while gain and a phase are appropriately controlled. Thereby, an influence of crosstalk due to the normal resolution component is reduced.
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