Patent ID: 7224658

Claim:
An adjusting method for a synchronous signal in an optical storage device, wherein the optical storage device produces a predetermined synchronous signal corresponding to a data synchronous signal from an optical disc, the predetermined synchronous signal includes a plurality of predetermined synchronous impulses and the data synchronous signal includes a plurality of data synchronous impulses, the method comprising: (a) setting N, N being an integer; (b) setting an N-th predetermined window, according to an N-th predetermined synchronous impulse of the predetermined synchronous signal; (c) judging whether or not two consecutive data synchronous impulses separated by a predetermined distance are detected outside the Nth predetermined window; (d) if the result of the step (c) is yes, then setting the predetermined synchronous signal matched with the data synchronous signal detected in the step (c); (e) if the result of the step (c) is not, then judging whether or not a data synchronous signal is detected within the Nth predetermined window, if yes, then returning back to the step (a); and (f) if the result of the step (e) is not, then judging whether or not N is greater than a threshold value to determine the method is terminated or updating N and then returning to the step (a).