Patent ID: 6459667
Filing Date: 2002-10-01
Classification: G11B

Abstract:
An optical disc recording and reproducing apparatus comprising:analog processing means including a binarization unit for binarizing a first signal read from an optical disc and a servo unit for controlling recording and reproducing a second signal in and from such an optical disc; synchronous clock generating means for generating a synchronous clock signal synchronized with the first signal read from such an optical disc; address detecting means for detecting address information indicating a physical position on an optical disc based on the first signal read from such an optical disc, and outputting a third signal indicating the address information and a fourth signal indicating that the address has been detected when the address information has been detected; a sector counter for holding a sector count value of a sector as a recording unit of such an optical disc, and updating the sector count value according to the synchronous clock signal and at least one of said third and fourth signals output from the address detecting means; and gate signal generation switching means for generating a gate signal for controlling the analog processing means, based on one of the sector count value held in the sector counter and information obtained from the analog processing means, according to the fourth signal indicating that the address has been detected, said fourth signal output from the address detecting means.