Data Scrambling Scheme that Controls Code Density with Data Occurrence Frequency


KIPS Transactions on Computer and Communication Systems, Vol. 10, No. 9, pp. 235-242, Sep. 2021
https://doi.org/10.3745/KTCCS.2021.10.9.235,   PDF Download:
Keywords: Cell State, Data Scrambling, flash memory, Variable Density
Abstract

Most data scrambling schemes generate pure random codes. Unlike these schemes, we propose a variable density scrambling scheme (VDSC) that differentiates densities of generated codes. First, we describe conditions and methods to translate plain codes to cipher codes with different densities. Then we apply the VDSC to flash memory such that preferred cell states occur more than others. To restrain error rate, specifically, the VDSC controls code densities so as to increase the ratio of center state among all possible cell states in flash memory. Scrambling experiments of data in Windows and Linux systems show that the VDSC increases the ratio of cells having near-center states in flash memory.


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Cite this article
[IEEE Style]
C. Hyun, G. Jeong, S. You, D. Lee, "Data Scrambling Scheme that Controls Code Density with Data Occurrence Frequency," KIPS Transactions on Computer and Communication Systems, vol. 10, no. 9, pp. 235-242, 2021. DOI: https://doi.org/10.3745/KTCCS.2021.10.9.235.

[ACM Style]
Choulseung Hyun, Gwanil Jeong, Soowon You, and Donghee Lee. 2021. Data Scrambling Scheme that Controls Code Density with Data Occurrence Frequency. KIPS Transactions on Computer and Communication Systems, 10, 9, (2021), 235-242. DOI: https://doi.org/10.3745/KTCCS.2021.10.9.235.