Patent ID: 6430127
Filing Date: 2002-08-06
Classification: G11B

Abstract:
A disk player for reproducing a bit clock from read data obtained by reading a signal recorded in a disk according to a constant linear velocity method and binarizing the read signal, carrying out reproduction processing, including data correction, with respect to the read data in synchronism with the bit clock to generate reproduced data, and storing the reproduced data in a buffer memory, the disk player comprising:a rotation control circuit for controlling the disk so as to rotate at a constant angular velocity; a head control circuit for controlling a head which reads a signal from the disk, such that the head is placed in a condition allowing signal reading from the disk, wherein the head is an optical head, the head control circuit including a focus controller for controlling a light beam from the optical head so as to come into focus on a signal recording face of the disk and a level storing section for storing a DC voltage level of a focus control signal generated by the focus controller immediately before the operation suspend controller suspends operation of the reproduction circuit, and the focus controller outputs a focus control signal indicative of the DC voltage level stored in the level storing section, when the operation suspend controller releases suspension of operation of the reproduction circuit; a reproduction circuit for performing reproduction processing to the signal read by the head to generate reproduced data to be stored in the buffer memory; a buffer controller for controlling writing and reading of the reproduced data with respect to the buffer memory; and an operation suspend controller for suspending operation of the reproduction circuit and the head control circuit when the buffer controller stops writing of the reproduced data into the buffer memory; the rotation control circuit being free from control by the operation suspend controller.