Track-counting method for use in optical disk apparatus

Details Track-counting method for use in optical disk apparatus Track-counting method for use in optical disk apparatus

1991-05-29

1994-02-01

Psitos, Aristotelis

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

369 50, 369 4428, 369 32, 369 54, 360 7814, G11B 700

Patent

active

052837769

ABSTRACT:
A method of counting the number of tracks on an optical disk each track comprising a plurality of sectors each having an address segment and a plurality of data segments, each of the segments having at its head portion a region for recording an access code representing a track number to which the segment belongs. The method comprises the steps of sampling the access code number through an optical head, obtaining a code number difference (V0) between the present sampled access code number (GC) and the previous sampled access code number (GC1), and adding the code number difference to a track count value (TCNT) to obtain the number of the tracks that the optical head moves to traverse. This method can accurately and surely count the number of the tracks of an optical disk.

REFERENCES:
patent: 4868819 (1989-09-01), Kimura
patent: 4896240 (1990-01-01), Moriya et al.
patent: 4918676 (1990-04-01), Miyasaka

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