Method and circuit for evaluating a wobble signal

摘要

The invention relates to a method for evaluating a wobble signal (TW). Also described is a circuit for performing such method and an apparatus for reading from and/or writing to optical recording media using such method or circuit. According to the invention the method includes the steps of:
- determining (22) the sign (SI) of the wobble signal (TW), the sign (SI) indicating whether a wobble period of the wobble signal (TW) is inverted or non-inverted,
- generating (23) a filtered signal (FS) by a weighted averaging of the sign (SI) over two or more wobble periods; and
- integrating (24) the filtered signal (FS).