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2012 IEEE 21st Asian Test Symposium (2012)
Niigata, Japan Japan
Nov. 19, 2012 to Nov. 22, 2012
ISSN: 1081-7735
ISBN: 978-1-4673-4555-2
pp: 131-136
ABSTRACT
Modern video applications such as video codecs are memory-intensive. As an emerging non-volatile memory technology, phase change memory (PCM) will benefit video applications due to its high density, low leakage power and superior scalability. However, PCM consumes high write energy and can only sustain a limited write number. Hence it is necessary to reduce the write number of PCM for video applications. In this paper, we propose Soft PCM to enhance both energy efficiency and lifetime of PCM. Soft PCM utilizes the error tolerance characteristic of video applications to relax the accuracy of write operations. Experimental results show that Soft PCM can reduce 22% writes and thus improve energy efficiency and lifetime of PCM with slight video quality degradation.
INDEX TERMS
Phase change materials, Video recording, Quality assessment, Random access memory, Hardware, Approximation methods, Reflective binary codes, write endurance, Approximate write, data-comparison write, error tolerance, PCM
CITATION

Y. Fang, H. Li and X. Li, "SoftPCM: Enhancing Energy Efficiency and Lifetime of Phase Change Memory in Video Applications via Approximate Write," 2012 IEEE 21st Asian Test Symposium(ATS), Niigata, Japan Japan, 2012, pp. 131-136.
doi:10.1109/ATS.2012.57
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