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Proceedings Paper

Comparison of multilevel runlength and fixed-length modulation for optical data storage
Author(s): Estuardo Licona; Steven W. McLaughlin
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Paper Abstract

In this paper we consider theoretical and practical aspects of a multilevel, re-writable and write-once optical recording system with compact disc parameters. A linear time invariant channel model is presented. We compare fixed-length and variable length runlength limited (RLL) coding and find that for the mark lengths of interest (600 nm for CD) M=4 is the optimum number of levels for RLL coding. For fixed-length modulation M=8 is the optimum number of levels and it is superior to RLL overall. We also show that M-ary RLL is a practical alternative if stronger coding can be applied to it.

Paper Details

Date Published: 16 September 2003
PDF: 10 pages
Proc. SPIE 5069, Optical Data Storage 2003, (16 September 2003); doi: 10.1117/12.533133
Show Author Affiliations
Estuardo Licona, Georgia Institute of Technology (United States)
Steven W. McLaughlin, Georgia Institute of Technology (United States)


Published in SPIE Proceedings Vol. 5069:
Optical Data Storage 2003
Michael O'Neill; Naoyasu Miyagawa, Editor(s)

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