Cosine Modulated Non-Uniform Filter Bank with Improved Computational Efficiency
نویسندگان
چکیده
منابع مشابه
Cosine Modulated Non-Uniform Filter Bank with Improved Computational Efficiency
In this correspondence, a simple design method for multirate near perfect reconstruction (NPR) integer decimated filter bank with non-uniform frequency spacing and linear phase property, that involves optimization of only single parameter, is proposed. It is derived from the uniform cosine modulated filter bank (CMFB) by merging some relevant band pass filters. The design procedure and the stru...
متن کاملCosine Modulated Non-Uniform Filter Banks
Traditional designs for non-uniform filter bank (NUFB) are usually complex; involve complicated nonlinear optimization with a large number of parameters and lack of linear phase (LP) property. In this paper, we describe a simple design method for multirate near perfect reconstruction (NPR) cosine modulated filter banks with non-uniform frequency spacing and linear phase property that involves o...
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Cet article presente des implantations optimisées de filtres prototypes de bancs de filtres modulés à reconstruction parfaite, à retard quelconque. Les implantations proposées sont basées sur des "schémas de liftage". Ici, l’approximation des coefficients "de liftage" est faite de manière à ce que le filtrage n’emploie que peu d’operations de décalage et addition. Comme le "schéma de liftage" e...
متن کاملAn Improved Design Technique for Multichannel Non-Uniform Filter Bank
The present work proposed a simple efficient iterative technique for the design of non-uniform filter banks (NUFB). Here the prototype filters is designed using a constrained equiripple finite impulse response (FIR) technique in which instead of optimizing the cut-off frequency, the passband edge frequency (ωP) is varied iteratively in order to adjust the filter coefficients so that the reconst...
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A novel nonuniform cosine modulated filter bank is presented, mixing the concepts of warped DFT (Discrete Fourier Transform) filter bank and pseudoQMF system (Quadrature Mirror Filter). Unequal bandwidths are achieved by allpass transformation of uniform polyphase system. The cosine modulation results in real valued channel signals, and hence simplified subband processing. The considered filter...
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ژورنال
عنوان ژورنال: International Journal of Image, Graphics and Signal Processing
سال: 2012
ISSN: 2074-9074,2074-9082
DOI: 10.5815/ijigsp.2012.02.01