Correcting errors in disk drive read back signals by...

Details Correcting errors in disk drive read back signals by... Correcting errors in disk drive read back signals by...

2007-09-25

2011-12-06

Alphonse, Fritz (Department: 2112)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Digital data error correction

C714S782000, C714S795000

Reexamination Certificate

active

08074151

ABSTRACT:
A signal detector comprises a first detector that generates raw decisions as a function of a read back signal. A selector generates a modified decision by at least one of applying a correction technique to soft information that is based on the raw decisions and marking an erasure in the soft information. A decoder decodes the modified decision to generate a final decision and determines whether a correct codeword is generated by evaluating the final decision. The decoder performs at least one of Reed-Solomon decoding, Bose Chaudhuri Hocquerghen (BCH) decoding, Hamming decoding, and Trellis decoding.

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