Bipartition architecture for low power JPEG Huffman decoder

Authors:
Shanq-Jang Ruan;Wei-Te Lin
Affiliations:
Low Power Systems Lab, Department of Electronic Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan, R.O.C.;Low Power Systems Lab, Department of Electronic Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan, R.O.C.
Venue:
ACSAC'07 Proceedings of the 12th Asia-Pacific conference on Advances in Computer Systems Architecture
Year:
2007

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Abstract

JPEG codec in portable device has become a popular technique nowadays. Because the portable device is battery powered, reducing power dissipation is practical. In this paper, a low power design technique for implementing JPEG Huffman decoder is presented, in which the Huffman table is divided into two partitions. As the main contribution, we propose a low power Huffman decoder with bipartition lookup table to reduce the power consumption in JPEG. Experimental results of the gate level simulation show that the proposed method can reduce the power consumption by 15% on average compared to general Huffman decoder.