Data reproducing apparatus
AssigneeFujitsu Limited
InventorsToshikazu Kanaoka, Masakazu Taguchi, Akiyoshi Uchida
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Abstract
Crosstalk cancellation is realized more accurately than ever by considering both magnitude and a phase difference of a crosstalk signal from a recording track adjoining a target track, in comparison with magnitude and a phase of a desired signal from the target track, which is implemented by providing a crosstalk amount detection means, a phase difference measurement means, and a crosstalk component generation means that generates a crosstalk component to be subtracted from a signal obtained by an optical scanning that includes the desired signal and the crosstalk.
Claims15
A data reproducing apparatus, wherein a crosstalk component of at least one adjoining track is removed from a reproduced signal obtained by a reproduction head scanning over a target recording track of a recording medium, and recorded data are reproduced according to a predetermined algorithm from the reproduced signal after removing the crosstalk component, comprising:
- crosstalk amount detection means that detects magnitude of the crosstalk component (crosstalk amount) indicative of a degree of influence of the crosstalk from at least one adjoining track to a desired signal from the target recording track,
- phase difference measurement means that measures an amount of a phase difference between the desired signal and the crosstalk component, and
- crosstalk component generation means that generates a crosstalk component that should be removed from the reproduced signal, based on the crosstalk amount and the phase difference.
Dependencies are inferred from the claim text.