Invention Grant
US07813230B2 Optical recording medium driving apparatus and optical recording medium driving method 失效
光记录介质驱动装置和光记录介质驱动方法

  • Patent Title: Optical recording medium driving apparatus and optical recording medium driving method
  • Patent Title (中): 光记录介质驱动装置和光记录介质驱动方法
  • Application No.: US11983072
    Application Date: 2007-11-07
  • Publication No.: US07813230B2
    Publication Date: 2010-10-12
  • Inventor: Masaki Uchida
  • Applicant: Masaki Uchida
  • Applicant Address: JP Tokyo
  • Assignee: Sony Corporation
  • Current Assignee: Sony Corporation
  • Current Assignee Address: JP Tokyo
  • Agency: Wolf, Greenfield & Sacks, P.C.
  • Priority: JP2006-303135 20061108
  • Main IPC: G11B7/00
  • IPC: G11B7/00
Optical recording medium driving apparatus and optical recording medium driving method
Abstract:
When a type of an optical disc is discriminated by disc type discriminating processing, search operation by a CD light beam is carried out in CD discriminating processing, and a distance from a position xf where a large signal change of a first time is detected as a fake phenomenon to a position xs where the large signal change of a second time corresponding to a recording layer is detected as a moving distance d3. Based on the moving distance d3, whether the optical disc is a CD medium is determined. In this manner, whether the optical disc is the CD medium or not can be determined correctly with high precision.
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