Patent ID: 8031564

Claim:
Method for determining a phase of a wobble signal, the method having the steps of: determining phase values for a plurality of wobble periods of the wobble signal, wherein a phase value of a wobble period is determined to have a first value if the wobble signal has a non-inverted shape, and wherein a phase value of a wobble period is determined to have a second value if the wobble signal has an inverted shape, summing a first sequence of determined phase values obtained from a first stage of delay lines to obtain a first sum signal, summing a second sequence of determined phase values obtained from a second stage of delay lines to obtain a second sum signal, subtracting said second sum signal from said first sum signal to obtain a filtered signal, integrating the filtered signal to obtain an integrated signal, and comparing the integrated signal with a threshold to determine the phase of the wobble signal, wherein the phase of the wobble signal is determined to have a first value if the integrated signal is above the threshold, and wherein the phase of the wobble signal is determined to have a second value if the integrated signal is below the threshold.