Patent ID: 7903508

Claim:
A system for determining groove/land (G/L) switching points of an optical disc, comprising: a motor rotating signal generating apparatus, for sensing rotation of a motor to generate a motor rotating signal, wherein the rotation of the optical disc corresponds to a period of the motor rotating signal; a header signal indicator generator, generating a header signal indicator; a detection apparatus, receiving the motor rotating signal and an original G/L switching point signal, dividing a disc sector corresponding to one period of the motor rotating signal into N regions, selecting a target region out of the N regions according to the original G/L switching point to determine a location of a reproduced G/L switching point, and adjusting at least one of a width and a location of the target region according to a rotational speed of the motor, where N is a positive integer; and a G/L switching point generating apparatus, generating a reproduced G/L switching point signal by referring to both of the location of the reproduced G/L switching point and the header signal indicator.