Writable optical drive with dynamically variable linear...

Details Writable optical drive with dynamically variable linear... Writable optical drive with dynamically variable linear...

2005-05-31

2005-05-31

Edun, Muhammad (Department: 2655)

Dynamic information storage or retrieval

Control of storage or retrieval operation by a control...

Control of information signal processing channel

C369S047290, C369S047300, C369S047530, C369S053100

Reexamination Certificate

active

06901039

ABSTRACT:
The present invention relates to methods and apparatus for dynamically varying a linear velocity of an optical drive during a write operation to an optical disc to reduce the likelihood of a buffer under-run event. By reducing a linear velocity and writing speed while the optical drive writes on the disc, an embodiment of the invention preserves the buffer and reduces a minimum data transfer rate required to sustain writing to the disc for a sustained period of time. The basic components of one embodiment of a CD-RW drive (100) in which the present invention may be implemented include a controller (110), a microcontroller (112), a nonvolatile memory (114), which stores firmware (116) executed by the microcontroller (112), a buffer (118), a spindle motor (120) and an optical pick-up (122).

REFERENCES:
patent: 5535186 (1996-07-01), Ishizawa
patent: 5561644 (1996-10-01), Kondo
patent: 5568459 (1996-10-01), Takamori et al.
patent: 6317809 (2001-11-01), Kulakowski et al.
patent: 6418099 (2002-07-01), Yamamoto
patent: 10-293961 (1998-11-01), None
patent: 10-302387 (1998-11-01), None

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