Disk, disk recording apparatus and disk reproducing apparatus

Dynamic information storage or retrieval – Condition indicating – monitoring – or testing – Including radiation storage or retrieval

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Details

369 59, 369 48, 3692754, G11B 700

Patent

active

056028130

ABSTRACT:
When recording data, a disk jitter is detected by a rotary encoder to obtain a rotation synchronizing clock which coincides in time axis variation therewith. The data are written once into a memory and then, read out at a timing in accordance with the rotation synchronizing clock to be recorded on a disk, thus forming a disk in which data signals between each of adjacent tracks closely coincide in clock phase with each other. When reproducing the data, a reproduced signal reproduced by one beam is subjected to A/D conversion, then, delayed by one rotation of the disk successively through a first memory and a second memory to obtain respective signals of adjacent tracks, whereby the crosstalk component is canceled from the data signal of a targeted track by a calculation circuit.

REFERENCES:
patent: 4873679 (1989-10-01), Murai et al.
patent: 5153869 (1992-10-01), Yoshimaru et al.
patent: 5214627 (1993-05-01), Nakashima et al.
patent: 5228020 (1993-07-01), Shiragami et al.

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