Error detection/correction and fault detection/recovery – Pulse or data error handling – Digital data error correction
Reexamination Certificate
2008-07-01
2008-07-01
Lamarre, Guy J (Department: 2112)
Error detection/correction and fault detection/recovery
Pulse or data error handling
Digital data error correction
C714S787000, C714S788000, C714S761000, C714S762000, C341S059000, C341S094000
Reexamination Certificate
active
07395482
ABSTRACT:
A data storage system includes an encoder subsystem comprising an error correction code encoder, a modulation encoder, and a precoder, and a decoder subsystem similarly comprising a detector, an inverse precoder, a channel decoder, and an error correction code decoder. The error correction encoder applies an error correction code to the incoming user bit stream, and the modulation encoder applies so-called modulation or constrained coding to the error correction coded bit stream. The precoder applies so-called precoding to the modulation encoded bit stream. However, this precoding is applied to selected portions of the bit stream only. There can also be a permutation step where the bit sequence is permuted after the modulation encoder before precoding is applied by the precoder. The decoder subsystem operates in the inverse manner.
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Communication Pursuant to Article 96(2) EPC for European Patent Application 04 798 889.4-1247 dated May 14, 2007.
Cideciyan Roy D.
Dholakia Ajay
Eleftheriou Evangelos S.
Galbraith Richard L.
Hanson Weldon M.
International Business Machines - Corporation
Lamarre Guy J
Tuchman Ido
Yamonaco Lisa M.
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