Dynamic information storage or retrieval – Control of storage or retrieval operation by a control...
Reexamination Certificate
2004-05-26
2008-12-02
Hindi, Nabil Z (Department: 2627)
Dynamic information storage or retrieval
Control of storage or retrieval operation by a control...
C369S124070, C369S047270
Reexamination Certificate
active
07460449
ABSTRACT:
This specification discloses a recordable optical recording medium containing preinstalled information, the method of reading the preinstalled information, and the circuit thereof. The recordable optical recording medium containing preinstalled information is a substrate with a spiral pregroove. Microscopically, the pregroove has regular wiggles. They are featured in containing a first waveform, a second waveform, and a third waveform with the same fundamental wave cycle. The duty cycle of the first waveform is 1. The duty cycles of the second and third waveforms are distinct. The combinations of these duty cycles are used to record the preinstalled information. Moreover, the invention discloses a method and circuit of reading the preinstalled information. After obtaining the wobble signals, the method further takes the steps of phase corrections, integrations, and resetting to more accurately obtain the preinstalled information.
REFERENCES:
patent: 6741546 (2004-05-01), Watabe et al.
Tseng Nai-Heng
Yu Chih-Ching
Birch & Stewart Kolasch & Birch, LLP
Hindi Nabil Z
Industrial Technology Research Institute
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