Patent ID: 7554897
Filing Date: 2009-06-30
Classification: G11B

Abstract:
1. A data reproducer which reproduces data from a recording medium which has a plurality of parallel linear tracks and in which data is recorded along the tracks, wherein: the recording medium has a first area along the tracks in which user data is recorded and a second area which precedes the first area along the tracks and in which pattern data used for correction of reproducing timing of the user data is recorded, and the pattern data adjacent to each other being mutually different between tracks adjacent to each other, and the data reproducer comprises: a head which faces the recording medium, and medium, reproduces the data recorded in the recording medium; a header pattern generator for generating a pattern data for each of the tracks; a first pattern comparing section which compares a pattern data for a track reproduced by the head with the pattern data for a track generated by the header pattern generator; a timing correcting section which corrects reproducing timing in accordance with a comparison result by the first pattern comparing section; a second pattern comparing section which compares the pattern data for the track reproduced by the head with other pattern data for an other track adjacent to the track generated by the header pattern generator; and a crosstalk detecting section which detects crosstalk in accordance with comparison results by the first pattern comparing section and the second pattern comparing section.