Patent ID: 8000177
Filing Date: 2011-08-16
Classification: G11B

Abstract:
1. A reading method for reading and reproducing information from a recording medium that can be read at a plurality of linear velocities by radiating a laser beam onto the recording medium, the reading method comprising: selecting one linear velocity from among the group of plural linear velocities; and changing a light modulation rate according to the selected linear velocity where the light modulation rate (Pp/Pave) is a ratio between the peak power (Pp) and the average read power (Pave) of the light intensity of the emitted laser beam, wherein the selecting step selects a first linear velocity (Lv the light modulation rate for reading at the first linear velocity (Lv the light modulation rate for reading at the second linear velocity (Lv the second light modulation rate (Mod the first linear velocity (Lv is true.