摘要
本文提出了一种易于硬件实现的高速优质的零树嵌入式编码算法 .通过精简重要图结构 ,消除结构中的一些冗余、减小一些无用的零树、消除一些不必保留的孤立零点 ,来提高编重要图的效率 ,同时也提高了压缩效果、加快了编解码速度 .采用提升方案构造双正交 9/ 7小波 ,不仅进一步提高了小波变换速度 ,而且为硬件实现提供了保障 .经模拟实验表明 :此方法加快小波变换速度 ,缩短了编、解码时间 ,提高了图像压缩比和恢复图像质量 .
A kind of high speed and high quality embedded zerotree coding algorithm for hardware implementation was presented, significance map structure was simplified, and some redundance structure was reduced. Some useless zerotrees were minished and some isolation zeros not to be kept were cleared up so that efficiency of significance map coding rose. It improved image compression performance, reduced coding and decoding execution time. We designed the biorthogonal 9/7 wavelet basis based on lifting scheme so that it not only raised wavelet transform speed, but also ensured hardware implementation. The simulation experimentation showed that this method improved speed of wavelet transform and shortened time of coding and decoding. It raised image compression rate and improved quality of restructure image.
出处
《电子学报》
EI
CAS
CSCD
北大核心
2004年第10期1730-1733,共4页
Acta Electronica Sinica
基金
自然科学基金重点项目 (No.699330 30 )
国防科技重点实验室基金试点项目 (No.KG0 1 0 4 )
关键词
零树
提升方案
重要图中止符
变树结构
Algorithms
Computer simulation
Image compression
Image quality
Trees (mathematics)
Wavelet transforms
