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2007
ACM

Energy-Aware Data Compression for Multi-Level Cell (MLC) Flash Memory

11 years 3 months ago
Energy-Aware Data Compression for Multi-Level Cell (MLC) Flash Memory
We discover significant value-dependent programming energy variations in multi-level cell (MLC) flash memories, and introduce an energy-aware data compression method that minimizes the flash programming energy rather than the size of the compressed data. We express energy-aware data compression as an entropy coding with unequal bit-pattern costs. Deploying a probabilistic approach, we derive the energy-optimal bit-pattern probabilities and the expected values of the bit-pattern costs for the large amounts of compressed data which are typical in multimedia applications. Then we develop an energy-optimal prefix coding that uses integer linear programming, and construct a prefix code table. From a consideration of Pareto-optimal energy consumption, we make tradeoffs between data size and programming energy, such as a 35% energy saving for a 50% area overhead. Categories and Subject Descriptors: C.4 [Performance of systems]: Modeling techniques; C.4 [Performance of systems]: Performance a...
Yongsoo Joo, Youngjin Cho, Donghwa Shin, Naehyuck
Added 12 Nov 2009
Updated 12 Nov 2009
Type Conference
Year 2007
Where DAC
Authors Yongsoo Joo, Youngjin Cho, Donghwa Shin, Naehyuck Chang
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