METHOD AND APPARATUS FOR PHASE AND/OR COPY WINDOW CONTROL FOR USE WITH A DOMAIN EXPANSION RECORDING MEDIUM AND RECORD CARRIER

摘要

The present invention relates to a method, apparatus and record carrier for controlling read-out and/or synchronization between an external magnetic field and written data during a reading operation from a magneto-optical recording medium comprising a storage layer and a read-out layer. An expanded domain leading to a pulse in a reading signal is generated in said read-out layer by copying a mark region from said storage layer to said read-out layer upon heating by a radiation power and with the aid of the external magnetic field. The waveform of the reading signal is analyzed, and the analysis result is used for correcting a phase deviation and/or for controlling a copy window size of the mark copying. Phase errors can thus be corrected for any size of the copy window. Even small changes in the copy window can be detected and corrected.