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AssigneeInternational Business Machines Corporation
InventorsRoy D. Cideciyan, Ajay Dholakia, Evangelos S. Eleftheriou, Richard L. Galbraith, Weldon M. Hanson, Thomas Mittelholzer, Travis R. Oenning
Estimating the term…
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 preceding to the modulation encoded bit stream. However, this preceding 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 preceding is applied by the precoder. The decoder subsystem operates in the inverse manner.
A method of encoding an input bit sequence, comprising:
A method of encoding an input bit sequence, comprising:
A method of encoding a data sequence for storage, comprising:
A method of encoding a data sequence for storage, comprising:
A method of decoding a bit sequence read from a storage medium, comprising:
A method of decoding a bit sequence read from a storage medium, comprising:
A method of decoding a data sequence read from a storage medium, comprising:
A method of decoding a data sequence read from a storage medium, comprising:
Dependencies are inferred from the claim text.