| 摘要 |
Method for tracking in an apparatus for reading from and/or writing to an optical recording medium, and corresponding apparatus for reading from and/or writing to an optical recording medium. In order, in an apparatus for reading from and/or writing to an optical recording medium ( 18 ), to enable exact counting of the tracks of the optical recording medium ( 18 ) crossed by an optical scanning unit ( 16 ), it is proposed to derive a signal corresponding to the TZC signal (Tracking ZeroCross) and also a signal corresponding to the MZC signal (Mirror Zero Cross) from the output signal or the output signals (OUT1, OUT2) of a phase comparator ( 1 ) provided for tracking in accordance with the so-called differential phase detection method.
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