Topic
Quadrature mirror filter
About: Quadrature mirror filter is a research topic. Over the lifetime, 955 publications have been published within this topic receiving 28900 citations.
Papers published on a yearly basis
Papers
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23 Sep 1991
Abstract: In [l], the use of McClellan transformations for the design of multidimensional filter banks from one-dimensional analysis/synthesis filters is presented for the case of is two-band, diamond-shaped pair. In [2], these concepts are expanded for the design of two-band filter banks with general parallelogram-shaped passband geometries. However, in [l, 21, the dlesign technique is restricted to filters which had zero-phase characteristics, which results in zero-phase two-dimensional filters. In this paper, we note that if the signal being processed is periodic, (which naturally arises when implementing filter banks in a size-limiting manner [a] for finite extent inputs), then the zero-phase restriction can be relaxed.
2 citations
26 Nov 1996
TL;DR: In this paper, an efficient iterative algorithm is presented for the design of quadrature mirror filters by minimizing the p-th power of the error function, where p may vary in different frequency bands.
Abstract: An efficient iterative algorithm is presented for the design of quadrature mirror filters by minimizing the p-th power of the error function, where p may varied in different frequency bands. Our algorithm incorporates the iterative reweighted least squares technique. The filter bank design is approximated as a weighted least-squares quadratic programming problem. Good designs are obtained typically in a few iterations. The algorithm designs quadrature mirror filters which satisfy the mixed L/sub p/ error criteria in the overall filter bank frequency responses and the filters stop-band responses.
1 citations
24 Nov 2003
TL;DR: This paper proposes a direct method of constructing signal-adaptive orthogonal wavelet filter banks with better energy compaction performance than that of Daubechies wavelet filters of same length.
Abstract: Recently, there has been a growing interest in investigating signal-adaptive multirate filter banks. In this paper, we propose a direct method of constructing signal-adaptive orthogonal wavelet filter banks with better energy compaction performance than that of Daubechies wavelet filters of same length. The speed of this method is fast, so it can be constructed in real time.
1 citations
31 Oct 1994
TL;DR: In this article, a least square (LS) design methodology for approximating perfect reconstruction filter banks is presented, where a filter bank can be represented as a multi-input multi-output (MIMO) LTI system whose transfer function is described by the filter bank polyphase matrix.
Abstract: This paper presents a least squares (LS) design methodology for approximating perfect reconstruction filter banks. A filter bank can be represented as a multi-input multi-output (MIMO) LTI system whose transfer function is described by the filter bank polyphase matrix. Rising this MIMO system representation, we frame a general least squares filter design problem. Then given an arbitrary set of rational analysis filters we find the causal synthesis filters for a filter bank which achieves the best causal LS approximation to perfect reconstruction. >
1 citations
TL;DR: This tutorial paper presents the complete unified efficient implementations of complex exponential- modulated and real-valued cosine-modulated quadrature mirror filter (QMF) banks used both in the standard SBR and LD-SBR encoder and decoder.
1 citations