Patent ID: RE41177

Claim:
A track count method for an optical disc in an optical disc system, the optical disc system comprising an optical pickup moveable along a radial direction of the optical disc, a light source installed on the optical pickup for emitting light, and a plurality of sensors installed on the optical pickup for detecting light reflected from the optical disc, the method comprising: using the light source to emit light towards the optical disc; using the sensors to detect light reflected from the optical disc; generating a tracking error (TE) signal based on the light received by the sensors while the optical pickup moves along a radial direction of the optical disc; generating a tracking error zero crossing (TEZC) signal based on the TE signal; generating a peak detecting (PD) signal based on the TE signal; generating a pseudo radio frequency zero crossing (RFZC) signal based on the PD signal; and generating a track count signal based on the TEZC signal and the pseudo RFZC signal.