Patent ID: 6747924
Filing Date: 2004-06-08
Classification: G11B

Abstract:
An optical disk reproduction apparatus comprising:an optical pickup arranged to read out recorded information from an optical disk; a waveform equalization section arranged to perform a waveform equalization process on a reproduced RF signal that is generated on the basis of the recorded information read out by said optical pickup; a jitter detection section arranged to detect jitter of the reproduced RF signal having been subjected to the waveform equalization process; a storing section arranged to store waveform equalization characteristics of the waveform equalization section; and a control section arranged to: perform test reproductions on the optical disk at a plurality of radial locations of the optical disk prior to actual reproduction of the optical disk; adjust a waveform equalization characteristic of said waveform equalization section to minimize jitter of the reproduced RF signal detected by said jitter detection section at each of the radial locations of the optical disk; store the waveform equalization characteristics adjusted at the each of the radial locations of the optical disk; and during the actual reproduction of the optical disk, adjust the waveform equalization characteristic of said waveform equalization section to a setting that is predicted on the stored waveform equalization characteristics and in accordance with a radial position on the optical disk, at each location to be reproduced via said optical pickup.