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IEICE TRANSACTIONS on Information

Energy Efficiency Improvement by Dynamic Reconfiguration for Embedded Systems

Kei KINOSHITA, Yoshiki YAMAGUCHI, Daisuke TAKANO, Tomoyuki OKAMURA, Tetsuhiko YAO

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Summary :

This paper seeks to improve power-performance efficiency of embedded systems by the use of dynamic reconfiguration. Programmable logic devices (PLDs) have the competence to optimize the power consumption by the use of partial and/or dynamic reconfiguration. It is a non-exclusive approach, which can use other power-reduction techniques simultaneous, and thus it is applicable to a myriad of systems. The power-performance improvement by dynamic reconfiguration was evaluated through an augmented reality system that translates Japanese into English. It is a wearable and mobile system with a head-mounted display (HMD). In the system, the computing core detects a Japanese word from an input video frame and the translated term will be output to the HMD. It includes various image processing approaches such as pattern recognition and object tracking, and these functions run sequentially. The system does not need to prepare all functions simultaneously, which provides a function by reconfiguration only when it is needed. In other words, by dynamic reconfiguration, the spatiotemporal module-based pipeline can introduce the reduction of its circuit amount and power consumption compared to the naive approach. The approach achieved marked improvements; the computational speed was the same but the power consumption was reduced to around $ rac{1}{6}$.

Publication
IEICE TRANSACTIONS on Information Vol.E98-D No.2 pp.220-229
Publication Date
2015/02/01
Publicized
2014/11/19
Online ISSN
1745-1361
DOI
10.1587/transinf.2014RCP0015
Type of Manuscript
Special Section PAPER (Special Section on Reconfigurable Systems)
Category
Architecture

Authors

Kei KINOSHITA
  University of Tsukuba
Yoshiki YAMAGUCHI
  University of Tsukuba
Daisuke TAKANO
  University of Tsukuba
Tomoyuki OKAMURA
  University of Tsukuba
Tetsuhiko YAO
  University of Tsukuba

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