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JPEG基线压缩算法的研究与优化 被引量:1

Optimal Coding of the JPEG Baseline Compression Algorithm
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摘要 对基于DCT的JPEG基线压缩算法的方法进行了优化,通过改变零系数个数和非零系数的位置可减少熵编码中间格式数据对的长度,并根据其在DCT块内的分布进一步经分离实现了Huff man码表优化。 Presents a optimal RLC coding and Huffman coding of the JPEG baseline compression algorithm.Exchanging the position of the numbers of zero coefficients and nonzero ac coefficient can ruduce the length of the result of RLC.Using a separate Huffman code table according to the propability of the pairs within DCT blocks can improve the compression rate.
机构地区 西北工业大学
出处 《机械与电子》 2005年第4期6-8,共3页 Machinery & Electronics
关键词 图像压缩 JPEG 离散余弦变换 行程编码 HUFFMAN编码 image compression JPEG DCT RLC code Huffman code
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参考文献5

  • 1Pennebaker W B, et al. JPEG Still Image Data Compression[M]. New York: Van Nostrand Reinhard,1993.
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同被引文献6

  • 1Lakhani Gopal.Optimal Humman Coding of DCT Blocks[C].IEEE Transactions on Circuits and Systems for Video Technology,2004.
  • 2Arai Y.Agui T,NaKajima M.A Fast DCT-SQ Scheme for Images[J].Trans.of the IEICE,1988,E71 (11):1 095 -1 097.
  • 3Agostini L V,Silva I S,Bampis S.Pipelined Fast 2-D DCT Arcitecture for JPEG Image Compression[A].SBCCI2001-XIV Symposium on Ntegrated Circuits and System Design[C].2001:226-231.
  • 4Shirer Heywood O.Preparing Now for the Future:U.S.Civil Radionavigation Policy and Planning.IEEE PLANS.Position Location and Navigation Symposium 1996,4:20-23.
  • 5Monro D M,Shrerlock B G.Optimal Quantization Strategy for DCT Image Compression[J].IEEE Proceeding Vision Image Signal Processing,1996,143 (1):10-14.
  • 6商亮,林莉.基于VHDL的哈夫曼编码器的IP核设计[J].今日电子,2003(8):21-22. 被引量:2

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