Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Reexamination Certificate
2006-12-19
2006-12-19
Korzuch, William (Department: 2627)
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
C369S044140, C369S124120
Reexamination Certificate
active
07151719
ABSTRACT:
The present invention relates to a method and a circuit for recovering information contained in a wobble track of an optical storage medium. One aim of the invention is to describe a method within an appliance for reading from and/or writing to optical storage media, which can correct disturbing data signal components in the wobble signal even when the swept frequency and the lowest signal frequency are close to one another. According to the invention, this object is achieved in that the signals from two detector halves of a photodetector which is used for reading the data contained in a track on an optical storage medium are provided with weighting factors which are adjusted dynamically during operation of the appliance for reading from and/or writing to optical storage media. In order to adjust the weighting factors, the obtained swept-frequency signal is linked to a data signal.
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D. Abramovitch et al: “High Frequency Wobbles: A Write Clock Generation Method For Rewritable Digital Versatile Disk (DVD) That Enables Near Drop-In Compatibility with DVD-Read Only Memories (DVD-ROMS)”, Japanese Journal of Applied Physics, vol. 39, No. 2B, Feb. 2000, pp. 846-854.
Büchler Christian
Reschke Uwe
Giesy Adam R.
Korzuch William
Laks Joseph J.
Lin Reitseng
Shedd Robert D.
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