Dynamic information storage or retrieval – Control of storage or retrieval operation by a control... – Control of information signal processing channel
Reexamination Certificate
2005-12-06
2009-08-04
Edun, Muhammad N. (Department: 2627)
Dynamic information storage or retrieval
Control of storage or retrieval operation by a control...
Control of information signal processing channel
C369S047530, C369S047360
Reexamination Certificate
active
07570556
ABSTRACT:
A method and apparatus for recording information with improved capabilities of suitably updating numerous setting items addressing the change in recording velocity of an optical disc caused during information recording. The method for recording on the surface of the optical recording disc by a laser beam emanated from a light source, comprises, in case when a recording velocity changes during an operation of recording information, the step of selecting setting items out of a plurality of items, in which the setting items may affect to a degrade recording quality with the change in the recording velocity and the plurality of items are used for determining the shape of pulsating laser beam; identifying a set of the items to be updated including the setting items; and updating the set item by item to values suitable for the present recording velocity at a predetermined time interval while continuing the operation of recording information. In addition, when the recording velocity changes prior to the step of updating during recording information, the control unit is configured to acquire one by one the values suitable for the present recording velocity, for example, by identifying two neighboring recording velocities interposing the present recording velocity there between, and carrying out either an approximate or interpolation calculation based on the two neighboring recording velocities.
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Dickstein & Shapiro LLP
Edun Muhammad N.
Ricoh & Company, Ltd.
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