摘要
自适应滤波器组设计是多速率滤波器组理论和应用的一个重要方面.由于其频率响应更好地匹配于输入信号的统计特性,这类滤波器组可获得更大的子带编码增益.研究了用提升方法设计三带自适应双正交滤波器组,给出了设计算法.最后,给出例子,说明其子带编码增益明显提高.
Signal-adapted filterbanks are an important subject in the theory and applications of the muhirate filterbanks. Because the frequency responses match the statistics of the underlying signals very well, these fiherbanks achieve the larger subband coding gains. In this paper, we investigate the design of three-band adaptive biorthogonal filterbanks by lifting scheme, and give the design algorithm. Finally, experimental results show that the subband coding gains can be markedly improved.
出处
《数学的实践与认识》
CSCD
北大核心
2009年第3期93-98,共6页
Mathematics in Practice and Theory
基金
西安理工大学科技创新计划项目资助
关键词
双正交滤波器组
子带编码增益
提升方法
biorthogonal filterbank
subband coding gain
adaptive lifting scheme
