Patent ID: 7995438
Filing Date: 2011-08-09
Classification: G11B

Abstract:
1. A reproducing method for reproducing information from an optical disk having a plurality of recording layers including a first recording layer and a second recording layer, comprising the step of: upon scanning with an optical spot from a first address on the first recording layer as a start point for a second address on the second recording layer which is a target address for reproducing in order to detect a reproduction position, selecting a scanning path for reaching the second address by scanning an already-recorded zone of at least one of the first recording layer and the second recording layer, from a first scanning path to carry out seeking after focus jump and a second scanning path to carry out coarse seeking before focus jump and only fine seeking after the focus jump, based on a positional relationship between a known boundary position between a not-yet-recorded zone and an already-recorded zone of the first recording layer or the second recording layer and the first address, wherein, the first scanning path is selected when a determination address belonging to the second recording layer in the vicinity of the first address is included in said already-recorded zone with respect to the radial direction of the optical disk, and the second scanning path is selected when a determination address belonging to the second recording layer in the vicinity of the first address is included in said not-yet-recorded zone with respect to the radial direction of the optical disk.