Dynamic information storage or retrieval – Binary pulse train information signal – Binary signal processing for controlling recording light...
Reexamination Certificate
2001-09-24
2008-05-27
Davis, David (Department: 2627)
Dynamic information storage or retrieval
Binary pulse train information signal
Binary signal processing for controlling recording light...
Reexamination Certificate
active
07379406
ABSTRACT:
After the initiation of writing, an output signal from an LPF is sampled in correspondence with a portion with a predetermined pulse width of recording data, so as to obtain a pit level. In the resultant signal, its varying portions which correspond to the multi-pulse trains of the write signal are smoothed. A controller modifies a level of a target level signal to be supplied to an APC circuit in such a manner that the pit level becomes an optimum pit level which has been obtained prior to the initiation of writing.
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Kumagai Eiji
Kumai Satoshi
Morizumi Toshio
Nagashima Kenji
Battaglia Michael V.
Davis David
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Sony Corporation
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