Tracking controller

  • Inventors: HIROKI TOMOYUKI
  • Assignees: Canon Inc
  • Publication Date: December 03, 1991
  • Publication Number: JP-H03272026-A

Abstract

PURPOSE: To renormalize a tracking error signal in an area only for reproducing to satisfactorily perform the tracking control in this area by detecting the area only for reproducing on a optical disk to reset the peak holding operation of a sum signal. CONSTITUTION: Detecting means 21 to 25 which detect the area only for reproducing on the optical disk and a means 26 which resets the peak holding operation of the sum signal by the detection signal of these means and holds the peak of the sum signal in the area only for reproducing are provided. The peak holding operation of the sum signal is reset at the time of detecting that an optical head enters into the area only for reproducing when travsersing a track. Consequently, the peak of the sum signal is held again in the area only for reproducing, and its value is used to normalize a tracking error signal again. Thus, the tracking error signal is automatically correctly normalized at the time of entering to the area only for reproducing. COPYRIGHT: (C)1991,JPO&Japio

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