Multiplane optical disc apparatus and access control method ther

Details Multiplane optical disc apparatus and access control method ther Multiplane optical disc apparatus and access control method ther

1997-04-09

1998-07-14

Hindi, Nabil

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

369 94, G11B 700

Patent

active

057815160

ABSTRACT:
The present invention is intended to provide a multiplane optical disc apparatus for conducting high-speed information access from a track on one plane to a track on a different plane.
The multiplane optical disc apparatus comprises a focus jump unit for conducting focus jump between the planes of the multiplane optical disc, an address acquiring unit for acquiring an address of a present position, an access length calculating unit for calculating a length from the present position to a target position, a coarse seek unit for conducting coarse seek from the present position to a target position and a fine seek unit for conducting fine seek from a position after the coarse seek to the target position. Furthermore, the apparatus comprises a virtual target position calculating function for calculating a length to a position on a plane of the present position in the radial direction of the target position if the plane of the target position differs from a plane of the present position acquired by the address acquiring unit, and a present plane coarse seek function for coarsely seeking a length of the plane of the present position corresponding to the length calculated by the virtual target position calculating function.

REFERENCES:
patent: 5606546 (1997-02-01), Best et al.
patent: 5682372 (1997-10-01), Yamakawa et al.
patent: 5696743 (1997-12-01), Kawasaki
patent: 5740136 (1996-08-01), Tsutsui et al.

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