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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10 citations
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TL;DR: In this article, a new design method was developed for quadrature mirror filter (QMF) bank using on time domain signals as mitral valve signal with unsymmetrical filter.
Abstract: In this paper, a new design method was developed for quadrature mirror filter (QMF) bank. Previous QMF bank design methods focused on frequency response properties such as pass band and stop band parameters with symmetrical filters. With the proposed method, QMF bank was designed using on time domain signals as mitral valve signal with unsymmetrical filter. The design problem was formulated as an objective function of difference between QMF bank’s input and output signals. QMF bank signal disparity was compared with correlation and peak reconstruction error (PRE). QMF bank prototype filter parameters were optimized with Artificial Bee Colony (ABC) and Differential Evaluation (DE) Algorithms. Design outputs were compared with previous works. DOI: http://dx.doi.org/10.5755/j01.eie.23.1.17584
10 citations
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03 May 1992
TL;DR: The advantages of quadrature mirror filters (QMFs) for the hardware implementation of two-dimensional HDTV filter banks are presented and the potential of dedicated circuit design with consideration of all a priori knowledge is illustrated.
Abstract: Key components for implementation of HDTV subband coding schemes are filter banks for band splitting at the transmitter side and for band synthesis at the receiver side. The authors deal with VLSI architectures and implementations of these filters. To reduce hardware cost and size, VLSI realizations of filter banks by dedicated circuits are considered. The impact of the filter algorithms, architectural structures and circuit technique on the implementation is explained. In particular, the advantages of quadrature mirror filters (QMFs) for the hardware implementation of two-dimensional HDTV filter banks are presented. The potential of dedicated circuit design with consideration of all a priori knowledge is illustrated for a 14*10 tap QMF filterbank with on-chip line memories. >
10 citations
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01 Sep 2019TL;DR: A concept of the Crisscross Optimization method for minimizing designing error of two channel linear phase QMF bank in frequency domain is introduced and the simulation results are compared with the modified particle swarm optimization, artificial bee colony, XSG and Levenberg Marquart method.
Abstract: During designing of two channel Quadrature Mirror Filter(QMF) bank, there occurs many errors such as peak reconstruction error, error in pass band, error in stop band, error in transition band and amplitude distortion. There are many meta-heuristic algorithms for the minimization of various errors of two channel QMF banks but they have drawbacks that either their convergence speed is slow or they have poor solution accuracy or premature convergence. In this paper, a concept of the Crisscross Optimization method for minimizing designing error of two channel linear phase QMF bank in frequency domain is introduced. This problem is taken as single objective function. The crisscross optimization algorithm makes use of two important operators that are horizontal crossover (HCX) and vertical crossover (VCX). The HCX operator works by dividing the problem space into simple hypercube with smaller search probability while VCX operator makes a way out for the stagnant dimensions which may be indifferentiable and cause premature convergence. The simulation results are compared with the modified particle swarm optimization, artificial bee colony, XSG and Levenberg Marquart method. From the comparison it is obvious that convergence speed and good solution accuracy.
10 citations
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01 May 1990TL;DR: The design of the analysis/synthesis filter is such that the filter bank can be implemented in an extremely efficient computational form and thereby circumvents designing 2-D filters.
Abstract: A filter bank for the directional decomposition of images is described. The filter bank represents a union of two powerful image processing tools: directional decomposition and subband decomposition. The directional components correspond to wedge-shaped regions in the frequency spectrum. The filter bank is implemented in a tree structure where each two-band system is maximally decimated and provides either exact or aliasing free reconstruction. The design of the analysis/synthesis filter is such that the filter bank can be implemented in an extremely efficient computational form. The design method described uses conventional 1-D analysis/synthesis filters as prototypes and thereby circumvents designing 2-D filters. >
10 citations