吉林大学学报(工学版) ›› 2016, Vol. 46 ›› Issue (3): 865-869.doi: 10.13229/j.cnki.jdxbgxb201603028

• Orginal Article • Previous Articles     Next Articles

Improved algorithm of SPIHT based on Max-Heap tree

CHE Xiang-jiu1, LIANG Sen2   

  1. 1.College of Computer Science and Technology, Jilin University,Changchun 130022,China;
    2.Key Laboratory of Symbolic Computation and Knowledge Engineering, Jilin University, Changchun 130022,China
  • Received:2015-05-06 Online:2016-06-20 Published:2016-06-20

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Abstract: The Set Partitioning in Hierarchical Trees (SPIHT) algorithm requires a large number of tests to determine its significance during several times of scanning in sequence, which severely damages the efficiency of compression. To raise the SPIHT's compression efficiency, an improved algorithm of SPIHT used by Max-Heap Tree is proposed. It optimize the test function of significance and reduce the algorithm's time complexity from O(logn) to O(1). Experimental results show that the improved SPIHT is particularly efficient in continuous wavelet transforms, and its encoding time goes to be a constant and compression efficiency is improved by several times.

Key words: computer system organization, set partitioning in hierarchical trees(SPIHT), wavelet transform, max-heap

CLC Number: 

  • TP301
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