Dynamic information storage or retrieval – Control of storage or retrieval operation by a control... – Mechanism control by the control signal
Patent
1997-08-18
1998-07-14
Tran, Thang V.
Dynamic information storage or retrieval
Control of storage or retrieval operation by a control...
Mechanism control by the control signal
369 48, 360 48, G11B 2012
Patent
active
057815186
ABSTRACT:
A method of recording data on a disc on a disc pre-recorded with servo control data, with the servo control data being pre-recorded in the form of convex and concave pits at intervals along substantially concentric tracks, the servo control data recorded in alignment in a diametrical direction of the disc. The method includes the steps of dividing the disc into a plurality of zones in the radial direction, dividing the tracks into a plurality segments such that there is an equal number of segments in each interval between adjacent pre-recorded servo control data. The method further includes the step of recording reference data on at least one segment of the plurality of segments in each interval between adjacent servo control data, with the reference data being utilized to adjust a gain and a phase of a read-out clock upon reproduction of the disc. The method further includes the step of recording digital data on at least one segment of the plurality of segments in each interval between adjacent servo control data, with the digital data being recorded at a constant angular velocity and with the constant angular velocity being different for each zone.
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Patent Abstracts of Japan vol. 8, No. 1 (p-246) (1438) Jan. 6, 1984 & JP-A-58 166 538 (Hitachi Seisakusho K.K.) Oct. 1, 1983 * abstract *.
Sako Yoichiro
Watanabe Tetsu
Yamagami Tamotsu
Sony Corporation
Tran Thang V.
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