Filter banks allowing perfect reconstruction
نویسندگان
چکیده
منابع مشابه
Modulated Qmf Filter Banks with Perfect Reconstruction
Quadrature mirror filter (QMF) banks are essential building blocks of a subband/transform coder. Generally, one wants the filter bank to have the perfect reconstruction (PR) property, which means that, in absence of coding, a delayed copy of the original signal is reconstructed exactly in the critically-sampled analysis-synthesis system of Fig. 1. Although there are useful filter banks that are...
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The Wavelet transform is defined for infinite-length signals. In practice we only have finite-length signals, so signals must be extended before they can be transformed. The question is how to extend the signal to minimize signal end effects, or how to find the signal extension that preserves the transform signal length. In this paper we discuss the problem of signal extension in perfect recons...
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The generalized sampling theorem of Papoulis [1], states that a deterministic continuous-time bandlimited signal x t ( ) is uniquely determined from the outputs of M linear systems, sampled at 1 M the Nyquist rate. The concept of multi-channel sampling of Brown, formulates the same property in terms of M analysis and M synthesis analog filters constituting an analog filter bank [2]. In this for...
متن کاملMorphology-based Perfect Reconstruction Filter Banks
This paper discusses the construction of perfect reconstruction filter banks using morphological operators. Two concrete examples are given: (i) the morphological Haar wavelet, and (ii) a wavelet decomposition obtained from the lifting scheme which has the nice property that local maxima are being preserved.
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The symmetric extension method hqs recently been shown to be an eMicient way for subband processing of finitelength sequences. This paper presents an extension of this method to general linear-phase perfect-reconstruction filter banks. We derive constraints on the length and symmetry polarity of the permissible filter banks and propose a new design algorithm. In the algorithm, different symmetr...
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ژورنال
عنوان ژورنال: Signal Processing
سال: 1986
ISSN: 0165-1684
DOI: 10.1016/0165-1684(86)90101-5