摘要
针对SPIHT算法存在的不足,提出一种新的基于多链表树簇结构的嵌入式小波编码算法.为了实现对高频带数据的高效组织,该算法定义了一种新的数据结构——树簇结构;为了提高编码后的码流在信道中的抗误码性能,在信源编码中对不同频带、不同方向的高频数据分别建立链表.实验结果表明,与SPIHT算法相比,该算法不仅编码效率高、速度快,而且抗误码性能好.
To solve the problems in SPIHT, a new wavelet embedded coding algorithm based on multilinked list tree-cluster structure was proposed. A new structure tree-cluster was defined to organize the data in high frequency bands more effectively. In order to improve the error resilient charaeteristic of the encoded code stream in the channel, linked lists were constructed respectively for the high frequency data in different frequency bands and different directions while source encoding was being performed. Experimental results show that the proposed algorithm is not only faster and more effective but also more robust than SPIHT algorithm.
基金
安徽省自然科学研究项目(KJ2008B113)资助
关键词
提升小波变换
SPIHT算法
多链表
树簇
lifting wavelet transform
SPIHT algorithm
multi-linked list
tree-cluster
