Patent ID: 6282160
Filing Date: 2001-08-28
Classification: G11B

Abstract:
A disc player for obtaining a read signal from an optical disc having a plurality of sectors including ID regions preformatted at given angular spatial intervals which demarcate the sectors and are segmented in the track extending direction into first and second regions, said disc player comprising:an optical read for projecting a light beam onto the optical disc and receiving a light beam reflected from a recording surface of the optical disc;first and second signal generating devices for generating first and second signals, respectively, which are dependent on record position information recorded in recording regions of the first and the second segmented regions by use of a signal output from said optical read means; andan ID region detecting device for outputting a detecting signal indicating that the ID region is detected when the first and the second signals are both present, said ID region detecting device comprisinga logical addition signal generating device for generating a logical addition signal based on the logical addition of the first and second signals;a logical multiplication signal generating device for generating a logical multiplication signal based on the logical multiplication of the first and second signals;a first judging device for judging whether a first count value signal and the logical multiplication signal are both present, wherein the first count value signal is generated based on the logical addition signal; anda second judging device for judging whether a second count value signal and the logical addition value are both present, wherein the second count value signal is generated based on an output the first judging device.