Patent ID: 6693872
Filing Date: 2004-02-17
Classification: G11B

Abstract:
A method for optical data recording and readout, comprising:a) scanning a blank region of an optical recording medium while recording a data band including a plurality of adjacent data tracks; b) synchronizing the recording on all tracks to a common data clock; c) simultaneously recording control tracks with the band of data tracks, each control track having a well-defined track center and a repetitive pattern of marks that is synchronized to the data clock; d) optically sensing the cross-scan positions and clock offsets of at least one control track on either side of the data band; e) interpolating between the control track cross-scan positions to predict the cross-scan positions of each data track and compensate for magnification errors; f) interpolating between the control track clock offsets to predict the clock offset of each data track and compensate for skew errors; and g) simultaneously reading and decoding information recorded on all tracks of the data band.