Table of Contents
ISRN Signal Processing
Volume 2013, Article ID 815619, 10 pages
http://dx.doi.org/10.1155/2013/815619
Review Article

Two-Channel Quadrature Mirror Filter Bank: An Overview

Department of Electronics and Communication Engineering, National Institute of Technology, Kurukshetra, Haryana 136119, India

Received 28 June 2013; Accepted 1 August 2013

Academic Editors: C.-W. Kok and C.-M. Kuo

Copyright © 2013 S. K. Agrawal and O. P. Sahu. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

During the last two decades, there has been substantial progress in multirate digital filters and filter banks. This includes the design of quadrature mirror filters (QMF). A two-channel QMF bank is extensively used in many signal processing fields such as subband coding of speech signal, image processing, antenna systems, design of wavelet bases, and biomedical engineering and in digital audio industry. Therefore, new efficient design techniques are being proposed by several authors in this area. This paper presents an overview of analysis and design techniques of the two-channel QMF bank. Application in the area of subband coding and future research trends are also discussed.