Error Detection And Correction For 5 1/4 Inch Optical Disks

Jerry Shifman

doi:10.1117/12.936849

14 January 1987 Error Detection And Correction For 5 1/4 Inch Optical Disks

Jerry Shifman

Proceedings Volume 0695, Optical Mass Data Storage II; (1987) https://doi.org/10.1117/12.936849
Event: 30th Annual Technical Symposium, 1986, San Diego, United States

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.

Citation Download Citation

Jerry Shifman "Error Detection And Correction For 5 1/4 Inch Optical Disks", Proc. SPIE 0695, Optical Mass Data Storage II, (14 January 1987); https://doi.org/10.1117/12.936849

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