| 近似重构正交镜像滤波器组的设计 |
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| 引用本文： | 洪淑月. 近似重构正交镜像滤波器组的设计[J]. 浙江师范大学学报(自然科学版), 2006, 29(3): 277-281 |
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| 作者姓名： | 洪淑月 |
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| 作者单位： | 浙江师范大学,数理与信息工程学院,浙江,金华,321004 |
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| 摘 要： | 为设计一种正交镜像滤波器组(QMF)的原型滤波器,使用高边瓣衰减(SLFOR)的可变性和组合窗函数设计了低通原型滤波器,并且应用线性优化使近似重构的误差最小.结果表明,该方法程序运行简单,优化算法使计算机处理的速度加快,而且高边瓣衰减(SLFOR)组合窗减少了能量的泄漏,防止了子带间的混叠.
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| 关 键 词： | 正交镜像滤波器组 原型滤波器 FIR滤波器 近似重构 高边瓣衰减 |
| 文章编号： | 1001-5051（2006）03-0277-05 |
| 收稿时间： | 2005-09-13 |
| 修稿时间： | 2006-02-22 |
Design of QMF with near-perfect reconstruction |
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| HONG Shuyue. Design of QMF with near-perfect reconstruction[J]. Journal of Zhejiang Normal University Natural Sciences, 2006, 29(3): 277-281 |
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| Authors: | HONG Shuyue |
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| Affiliation: | College of Mathematis, Physics and Information Engineering, Zhejiang Normal University, Jinhua Zhefiang 321004, China |
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| Abstract: | A method for designing prototype filters for quadrature mirror(QMF) banks was proposed.To minimize the value of reconstruction error for near-perfect reconstruction(NPR),linear optimization had been used.Combinational window functions with high side-lobe-all-off-ate(SLFOR) had been used to design lowpass prototype filters.Use of window functions resulted in simple implementation.The results showed the proposed optimization algorithm processed very fast,and reduced the energy leakage due to aliasing from one sub-band to the other. |
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| Keywords: | QMF prototype filters FIR NPR SLFOR |
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