| 一种正交镜像滤波器的优化设计 |
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| 引用本文： | 卢建军,米琛.一种正交镜像滤波器的优化设计[J].计算机与网络,1999(14). |
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| 作者姓名： | 卢建军 米琛 |
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| 作者单位： | 西安矿业学院通信工程系，西安矿业学院 副教授 |
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| 摘 要： | 子带编码中,广泛采用正交镜像滤波器(QMF)消除各子带谱的混叠。文章在加权均方最小基础上提出一种新的、有效的QMF最优设计方法。通过均方最小加权函数的适当选择,以使整个系统的频率响应近似为1,产生权值最小正交镜像滤波器。并给出具体设计例子。
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| 关 键 词： | 子带编码 正交镜像滤波器 代价函数 梳状容限函数 |
An Optimization Design of Quadra - ture Mirror Filters |
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| Lujianjun Mi Chen.An Optimization Design of Quadra - ture Mirror Filters[J].China Computer & Network,1999(14). |
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| Authors: | Lujianjun Mi Chen |
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| Affiliation: | Xi' an Mining Institute |
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| Abstract: | Quadrature mirror filters (QMF) are often used in sub - band coding to eliminate aliasing between sub -bands. This paper prestents a novel and efficient optimization method for the design of quadrature mirror filters in the weighted least squares sense. By a suitable choice of the least squares weighting function, approximately 1 of frequendy response of the overall system is resulted in , and the weighted minimum quadrature mirror filter is producted. A specific design example is also given. |
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| Keywords: | sub - band coding QMF Cost function Ripple tolerance function |
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