Patent ID: 6031796
Filing Date: 2000-02-29
Classification: G11B

Abstract:
An optical disk apparatus for performing recording and reproduction of information on an optical disk having a sector format which consists of a sector mark area in which a sector mark is recorded and an address area in which a plurality of VFO segments and ID segments are alternately provided, comprising:a sector mark detector which detects said sector mark;a read gate controller which controls a read gate to be opened and closed, said read gate enabling readout of information from said VFO segment when said read gate is opened;a PLL controller which initiates synchronization of a signal read from said VFO segment with a PLL in response to the opening of said read gate; andan address information detector which detects an address identifier recorded in said ID segment,and wherein, if said address information detector cannot detect said address identifier, said read gate controller closes said read gate and opens said read gate at a timing corresponding to said VFO segment located immediately after said ID segment in which said address identifier cannot be detected.