An Improved SPIHT Algorithm Based on Wavelet Coefficient Blocks for Image Coding

摘要：

An improved set partition in hierarchical trees (SPIHT) algorithm based on wavelet coefficient blocks is presented for image coding. According to the algorithm characteristic of traditional SPIHT that scanning once can process four wavelet coefficients, our approach is to divide the wavelet transform coefficient matrix into corresponding coefficient blocks and encodes every block with different strategy. When the maximum value of the coefficient block is less than the current threshold, only one bit is used for coding, thus to decrease the number of comparison and reduce the loss of coding efficiency caused by repeat coding and early coding for non-important coefficients. Analysis and simulation results show that the proposed algorithm can provide a better peak signal to noise ratio performance at low bit rate.

关键词： SPIHT wavelet transform image coding compression efficiency

作者: Hualiang Zhu Chundi Xiu Dongkai Yang

作者单位: Dept.of Electronic and Information Engineering Beijing University of Aeronautics and Astronautics Beijing, P.R.China

会议类型: 国际会议

会议名称: The 2010 International Conference on Computer Application and System Modeling(2010计算机应用与系统建模国际会议 ICCASM 2010)

会议地点: 太原

会议语种:英文

页码: 646-649

在线出版日期: 2010-10-22（万方平台首次上网日期，不代表论文的发表时间）