Method and apparatus for reading and writing a multilevel...

Dynamic information storage or retrieval – Control of storage or retrieval operation by a control... – Control of information signal processing channel

Reexamination Certificate

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C369S124120

Reexamination Certificate

active

07136333

ABSTRACT:
A system and method are disclosed for reading a multilevel signal from an optical disc. The method includes reading a raw analog data signal from a disc using an optical detector and adjusting the amplitude of the raw analog data signal. A timing signal is recovered from the amplitude adjusted analog data signal and correction is made for amplitude modulation of the raw analog data signal by processing the raw analog data signal and the timing signal.

REFERENCES:
patent: 5136573 (1992-08-01), Kobayashi
patent: 5144615 (1992-09-01), Kobayashi
patent: 5148335 (1992-09-01), Kudo et al.
patent: 5537382 (1996-07-01), McLaughlin et al.
patent: 5719843 (1998-02-01), Nakajima et al.

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