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Proceedings Paper

Error Detection And Correction For 5 1/4 Inch Optical Disks
Author(s): Jerry Shifman
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Paper Abstract

The types of errors likely to occur with optical disks are randomly distributed short error bursts combined with less frequent longer error bursts. This error environment can be treated successfully with some form of Reed-Solomon EDAC code, since R-S codes provide good correction capability for long error bursts. Two forms of Reed-Solomon coding have been given serious consideration by the optical disk community: product codes and long-distance codes. Product codes have the advantage that they use short codewords, and thus operate faster and require less complexity in a VLSI implementation. Long-distance codes have the advantage that they use a smaller amount of redundancy to achieve the same error correction power as product codes, and thus leave a greater percent of the gross disk capacity for user data. The trade-offs associated with each of these methods are examined. An advanced form of Reed-Solomon encoding is discussed. This specific R-S technique reduces operating time and silicon complexity, and permits certain operations which are either impossible or very difficult with older R-S methods.

Paper Details

Date Published: 14 January 1987
PDF: 16 pages
Proc. SPIE 0695, Optical Mass Data Storage II, (14 January 1987); doi: 10.1117/12.936849
Show Author Affiliations
Jerry Shifman, Cyclotomics, Incorporated (United States)

Published in SPIE Proceedings Vol. 0695:
Optical Mass Data Storage II
Robert P. Freese; Albert A. Jamberdino; Maarten R. de Haan, Editor(s)

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