Read error recovery using soft information

Details Read error recovery using soft information Read error recovery using soft information

2006-08-18

2010-06-15

Negrón, Daniell L (Department: 2627)

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Reexamination Certificate

active

07738201

ABSTRACT:
In general, this disclosure describes read recovery techniques for data storage devices that use soft information associated with multiple read operations to detect data. Specifically, the read recovery techniques comprise computing soft information for each bit detected during a first read operation of a data storage medium, computing soft information for each bit detected during a second read operation of the data storage medium and averaging the soft information computed during the first and second read operations to determine the value of each of the bits.

REFERENCES:
patent: 5576904 (1996-11-01), Behrens
patent: 7136244 (2006-11-01), Rothberg
patent: 2002/0071504 (2002-06-01), Chen et al.
patent: 2005/0052770 (2005-03-01), Osafune
patent: 2007/0047121 (2007-03-01), Eleftheriou et al.
Kurtas et al., “Detection Methods for Data-dependent Noise in Storage Channels,” http://people.deas.harvard.edu/˜kavcic/papers/CRC33.pdf, 22 pgs., printed Aug. 18, 2006.

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