Multirate Systems and Filter Banks
Multirate Systems and Filter Banks
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DOI：
10.4018/978-1-930708-30-3.ch002
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
T. Saramaki;R. Bregović
中科院分区：
文献类型：
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作者：
T. Saramaki;R. Bregović
本章概要如下。第 2 节回顾了现有的各种类型的有限脉冲响应 (FIR) 和无限脉冲响应 (IIR) 双通道滤波器组。考虑了这些滤波器组的基本操作，并规定了无混叠、完美重建 (PR) 和近完美重建 (NPR) 滤波器组的要求。还提到了一些有效的合成技术。此外，还提供了一些示例来相互比较各种双通道滤波器组。第 3 节重点介绍多通道（M 通道）均匀滤波器组的设计。主要重点是在双通道滤波器组的帮助下使用树形结构滤波器组来设计这些组，并在单个原型滤波器和适当的余弦调制或 MDFT 技术的帮助下生成整个滤波器组。第 4 节展示了如何使用单个两通道滤波器组作为基本构建块来生成倍频程滤波器组。此外，还简要讨论了选频倍频程滤波器组和离散时间小波组之间的关系。最后，第 5 节给出了结论性意见。
The outline of this chapter is as follows. Section 2 reviews various types of existing finite impulse response (FIR) and infinite impulse response (IIR) two-channel filter banks. The basic operations of these filter banks are considered and the requirements are stated for alias-free, perfect-reconstruction (PR), and nearly perfect-reconstruction (NPR) filter banks. Also some efficient synthesis techniques are referred to. Furthermore, examples are included to compare various two-channel filter banks with each other. Section 3 concentrates on the design of multi-channel (M-channel) uniform filter banks. The main emphasis is laid on designing these banks using tree-structured filter banks with the aid of two-channel filter banks and on generating the overall bank with the aid of a single prototype filter and a proper cosine-modulation or MDFT technique. In Section 4, it is shown how octave filter banks can be generated using a single two-channel filter bank as the basic building block. Also, the relations between the frequency-selective octave filter banks and discrete-time wavelet banks are briefly discussed. Finally, concluding remarks are given in Section 5.