Hardware sharing in tree-structure QMF banks

Hwan-Rei Lee, C. Jen
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引用次数: 1

Abstract

In this paper, a hardware sharing method for multirate systems is presented. Using the proposed method, we successfully designed the architecture of a tree-structured quadrature mirror filter (QMF) bank, which can also be used to implement discrete wavelet transforms. The features of the resulted shared architectures are that they keep the same topology of the original non-shared one and requires less power for delay registers. Moreover, 100% utilization can also be achieved, if the input rate of the system is not required to be constant. Several techniques are used in the sharing method. The techniques include a parallel register duplication scheme, switch timing mapping and interconnection arrangement.
树状结构QMF银行的硬件共享
提出了一种多速率系统的硬件共享方法。利用所提出的方法,我们成功地设计了一个树结构正交镜像滤波器(QMF)组,该组也可用于实现离散小波变换。所得到的共享体系结构的特点是,它们与原始的非共享体系结构保持相同的拓扑结构,并且对延迟寄存器的功耗要求更低。此外,如果不要求系统的输入速率恒定,也可以实现100%的利用率。在共享方法中使用了几种技术。这些技术包括并行寄存器复制方案、开关时序映射和互连安排。
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