Dynamic information storage or retrieval – Control of storage or retrieval operation by a control... – Control of information signal processing channel
Reexamination Certificate
2008-05-20
2008-05-20
Korzuch, William (Department: 2627)
Dynamic information storage or retrieval
Control of storage or retrieval operation by a control...
Control of information signal processing channel
C369S059250
Reexamination Certificate
active
07376056
ABSTRACT:
A method for reading address information from an optical disc with a wobbled track groove includes the steps of: obtaining a sine wave address signal, a first address signal representing a first groove region with sine wave wobbled portions and an inverted phase portion, and a second address signal representing a second groove region with steep inward or outward displacements; multiplying a first reference signal, being phase-locked to, and having the same frequency as, the sine wave address signal, and the first address signal together to obtain a first multiplied signal; multiplying a second reference signal, being phase-locked to, and having a frequency twice as high as, the sine wave address signal, and the second address signal together to obtain a second multiplied signal; integrating the first, multiplied signal and the second multiplied signal separately to obtain a first integral and a second integral, respectively; and adding the first and second integrals together.
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Furumiya Shigeru
Ishibashi Hiromichi
Kimura Naohiro
Minamino Jun-ichi
Nakao Masahito
Danielsen Nathan
Korzuch William
Matsushita Electric - Industrial Co., Ltd.
Panitch Schwarze Belisario & Nadel LLP
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