| 摘要 |
<p>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.</p><p><Paragraphs id="pa02" num="0002" xmlns:base="http://www.sipo.gov.cn/XMLSchema/base">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, the weighted averaging being performed by subtracting a sum of the signs obtained from a second stage (6) of delay lines from a sum of the signs obtained from a first stage (5) of delay lines, and
- integrating (24) the filtered signal (FS).
</p> |
