Statistically Optimized Asynchronous Barrel Shifters for Variable Length Codecs 


Vol. 28,  No. 11, pp. 891-901, Nov.  2003


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  Abstract

This paper presents low-power asynchronous barrel shifters for variable length encoders and decoders useful in portable applications using multimedia standards. Our approach is to create multi-level asynchronous barrel shiners optimized for the skewed shift control statistics often found in these codecs. For common shifts, data passes through one level, whereas for rare shifts, data passes though multiple levels. We compare our optimized designs with the straightforward asynchronous and synchronous designs. Both pre- and post-layout HSPICE simulation results indicate that, compared to their synchronous counterparts, our designs provide over a 40% savings in average energy consumption for a given average performance.

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  Cite this article

[IEEE Style]

P. A. Beerel and K. Kim, "Statistically Optimized Asynchronous Barrel Shifters for Variable Length Codecs," The Journal of Korean Institute of Communications and Information Sciences, vol. 28, no. 11, pp. 891-901, 2003. DOI: .

[ACM Style]

Peter A. Beerel and Kyeoun-Soo Kim. 2003. Statistically Optimized Asynchronous Barrel Shifters for Variable Length Codecs. The Journal of Korean Institute of Communications and Information Sciences, 28, 11, (2003), 891-901. DOI: .

[KICS Style]

Peter A. Beerel and Kyeoun-Soo Kim, "Statistically Optimized Asynchronous Barrel Shifters for Variable Length Codecs," The Journal of Korean Institute of Communications and Information Sciences, vol. 28, no. 11, pp. 891-901, 11. 2003.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880