Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Reexamination Certificate
2009-01-13
2011-12-20
Simpson, Lixi C (Department: 2627)
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
C369S053230
Reexamination Certificate
active
08081544
ABSTRACT:
A method and an apparatus for deciding a spherical aberration compensation (SAC) value for an optical storage medium are provided. The optical storage medium comprises at least one recording layer and a cover layer. The SAC value is suitable for a selected one of the at least one recording layer. First, a focus search on the optical storage medium is performed to derive a focus error (FE) signal in response to a testing SAC value. Then, a center level and a center basis corresponding to the testing SAC value according to the FE signal is determined. The SAC value according to the center level, the center basis, and the testing SAC value is also determined. When the center level and the center basis are equal, the SAC value is determined to be the testing SAC value.
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Office Action from corresponding Taiwanese Application No. 097101496 dated May 18, 2011.
Chen Chih-Yuan
Hsieh Hsiang-Ji
Huang Chao-Ming
Wu Gwo-Huei
Grossman Tucker Perreault & Pfleger PLLC
Mediatek Inc.
Simpson Lixi C
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