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首页> 外文期刊>Journal of signal processing systems for signal, image, and video technology >Prototype Filter Design Approaches for Near Perfect Reconstruction Cosine Modulated Filter Banks - A Review
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Prototype Filter Design Approaches for Near Perfect Reconstruction Cosine Modulated Filter Banks - A Review

机译：近完美重构余弦调制滤波器组的原型滤波器设计方法-综述

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Cosine Modulated Filter Banks (CMFB) are very popular among the different maximally decimated filter banks due to their design ease and simplicity in implementation and the property that all the coefficients of all the filters are real. All the analysis and synthesis filters are derived from one or two prototype filters. Hence, recently, the design of the prototype filter in a CMFB has become a subject of interest in the field of multirate signal processing. Perfect Reconstruction (PR) filter banks are those which can produce at the output, a weighted delayed version of the input. But in most of the applications a near perfect reconstruction (NPR) is sufficient. This can reduce the computational complexity. Different approaches developed for the efficient and optimal design of the prototype filter in a NPR orthogonal CMFB are studied, classified and summarized in this paper. In today's applications, less space and low power consumption are very essential. When the different design approaches for the design of the prototype filter in CMFB are compared, it is observed that the one using frequency response masking(FRM) and meta-heuristic optimization techniques gives better performance in terms of implementation complexity, which in turn can lead to reduced chip size and power consumption. It is hoped that this review will be highly beneficial to the researchers working in the area of multirate signal processing. At the end, we also propose some novel design approaches for the design of low complexity prototype filter using FRM technique.
机译：余弦调制滤波器组（CMFB）在不同的最大抽取滤波器组中非常受欢迎，这是因为它们的设计简便，实现简单以及所有滤波器的所有系数都是实数的特性。所有分析和综合过滤器均来自一个或两个原型过滤器。因此，近来，CMFB中的原型滤波器的设计已经成为多速率信号处理领域中的关注主题。完美重建（PR）滤波器组是可以在输出端生成的加权加权输入版本。但是在大多数应用中，近乎完美的重建（NPR）就足够了。这可以降低计算复杂度。本文研究，分类和总结了为NPR正交CMFB中原型滤波器的高效和最佳设计开发的不同方法。在当今的应用中，较小的空间和低功耗非常重要。当比较用于CMFB中原型滤波器设计的不同设计方法时，可以观察到使用频率响应屏蔽（FRM）和元启发式优化技术的方法在实现复杂性方面具有更好的性能，这反过来可能导致以减少芯片尺寸和功耗。希望这篇评论对从事多速率信号处理领域的研究人员非常有益。最后，我们还提出了一些新颖的设计方法，用于使用FRM技术设计低复杂度原型滤波器。

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