Allpass Delay Chain-Based IIR PR Filterbank and Its Application to Multiple Description Subband Coding

Shankar, Bhavani MR and Makur, Anamitra (2002) Allpass Delay Chain-Based IIR PR Filterbank and Its Application to Multiple Description Subband Coding. In: IEEE Transactions on Signal Processing, 50 (4). 814 -823.

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Abstract

A class of infinite impulse response (IIR) perfect reconstruction (PR) filterbank is obtained with an allpass delay chain and finite impulse response (FIR) matrices at the analysis side. Such a formulation leads to a filterbank that can be optimized to any desired response. For a first-order allpass, the synthesis bank becomes FIR. Design examples showing warping of the frequency scale and filters with unequal passband widths are presented. The latter part of the work deals with designing a filterbank for a multiple description coding scenario. This is achieved in two parts: by obtaining the MMSE synthesis bank for a given analysis bank and channel state and by optimizing the analysis response to minimize the average distortion in the presence of channel erasures and quantization. The proposed IIR filterbank, as well as the well-known FIR paraunitary filterbank, are optimized for various channels, and their performances for the two-channel case have been compared with the derived optimal performance

Item Type:	Journal Article
Publication:	IEEE Transactions on Signal Processing
Publisher:	IEEE
Additional Information:	Copyright 1990 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Keywords:	Allpass function;IIR filterbank;Multiple description Coding;Subband coding
Department/Centre:	Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited:	27 Feb 2007
Last Modified:	19 Sep 2010 04:22
URI:	http://eprints.iisc.ac.in/id/eprint/5024

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