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대한전자공학회 KITE JOURNAL OF ELECTRONICS ENGINEERING KITE JOURNAL OF ELECTRONICS ENGINEERING 제6권 2호
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    초록·키워드

    The Huffman coding is widely used technique for lossless image source coding. For high speed lossless image data compression, a high speed entropy coding system is needed to construct the compressed codes of the source image and to reconstruct it. In this paper, we describe the programmable VLSI architecture of the parallel VLC decoder using tree-based code. The architecture is based on efficient scheme of mapping the tree representing binary code into a RAM. Most tree-based compression architectures allow only one codebook to be implemented such as ROM or PLA. In this proposed architecture, the tree-based code is stored in a RAM so that the codebook can be changed to suit the different applications. This architecture also adopts a parallel structured VLC decoder which decodes one codeword in one clock cycle regardless of its length for high throughput rates. The post-layout simulation of the critical path of the proposed architecture estimates that a decoding throughput of 52M codewords/s with a single chip is attainable with 0.8μm CMOS technology.

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      UCI(KEPA) : I410-ECN-0101-2009-569-013329003