Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Reexamination Certificate
2008-03-25
2008-03-25
Tran, Thang V. (Department: 2627)
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
C369S124120, C369S059150
Reexamination Certificate
active
07349321
ABSTRACT:
Disclosed here is an apparatus and method for realizing write/read of mass information by reducing cross-talk components that are apt to increase in narrow tracks when various disturbances and variations are recognized. In order to achieve the above object, the apparatus is provided with a plurality of equalizers for correcting frequency characteristics of signals reproduced from a plurality of spots, then outputs from those equalizers are subjected to a computing process to correct tap coefficients of the equalizers sequentially so as to minimize the influence of the subject cross-talk, thereby realizing stable reduction of the cross-talk components.
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Hirotsune Akemi
Kudo Hiromi
Minemura Hiroyuki
Miyamoto Harukazu
Antonelli, Terry Stout & Kraus, LLP.
Hitachi , Ltd.
Tran Thang V.
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