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BCH for MLC Flash

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BCH = Bose, Chaudhuri and Hocquenghem

Why BCH :

Modern mobile systems such as MP3 players and digital cameras incorporate NAND Flash memories because of its non-volatile property and a high density.

In order to reduce the chip area, MLC (Multi-Level Cell) structure is adopted however it may incur high error rate.

One-bit-error correction Hamming code is often used in SLC (Single-Level-Cell) structure, but it is not appropriate for MLC.

Therefore stronger error control schemes like BCH code is used, for its multi-bit error correction capability.

from here

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