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Content-assisted file decoding for nonvolatile memories

Li, Yue and Wang, Yue and Jiang, Anxiao (Andrew) and Bruck, Jehoshua (2012) Content-assisted file decoding for nonvolatile memories. In: 2012 Conference Record of the Forty Sixth Asilomar Conference on Signals, Systems and Computers (ASILOMAR). IEEE , Piscataway, NJ, pp. 937-941. ISBN 978-1-4673-5051-8.

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Nonvolatile memories (NVMs) such as flash memories play a significant role in meeting the data storage requirements of today's computation activities. The rapid increase of storage density for NVMs however brings reliability issues due to closer alignment of adjacent cells on chip, and more levels that are programmed into a cell. We propose a new method for error correction, which uses the random access capability of NVMs and the redundancy that inherently exists in information content. Although it is theoretically possible to remove the redundancy via data compression, existing source coding algorithms do not remove all of it for efficient computation. We propose a method that can be combined with existing storage solutions for text files, namely content-assisted decoding. Using the statistical properties of words and phrases in the text of a given language, our decoder identifies the location of each subcodeword representing some word in a given input noisy codeword, and flips the bits to compute a most likely word sequence. The decoder can be adapted to work together with traditional ECC decoders to keep the number of errors within the correction capability of traditional decoders. The combined decoding framework is evaluated with a set of benchmark files.

Item Type:Book Section
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Bruck, Jehoshua0000-0001-8474-0812
Additional Information:© 2012 IEEE. This work was supported in part by the NSF CAREER Award CCF-0747415 and the NSF grant CCF-1217944.
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Record Number:CaltechAUTHORS:20170207-175141968
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Official Citation:Y. Li, Y. Wang, A. Jiang and J. Bruck, "Content-assisted file decoding for nonvolatile memories," 2012 Conference Record of the Forty Sixth Asilomar Conference on Signals, Systems and Computers (ASILOMAR), Pacific Grove, CA, 2012, pp. 937-941. doi: 10.1109/ACSSC.2012.6489154
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:74142
Deposited By: Kristin Buxton
Deposited On:08 Feb 2017 15:53
Last Modified:11 Nov 2021 05:25

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