Information-theoretic performance of quadrature mirror filters

被引：4

作者：

Divakaran, A ^{[1
]}

Pearlman, WA ^{[1
]}

机构：

[1] RENSSELAER POLYTECH INST,DEPT ELECT COMP & SYST ENGN,TROY,NY 12180

来源：

IEEE TRANSACTIONS ON INFORMATION THEORY | 1995年 / 41卷 / 06期

基金：

美国国家科学基金会;

关键词：

quadrature mirror filters; subband coding; source coding; rate-distortion theory;

D O I：

10.1109/18.476343

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

Most existing Quadrature Mirror Filters (QMF's) closely match the derived closed-form expression for an efficient class of QMF's. We use the closed-form expressions to derive the relationship between information-theoretic loss and the Frequency selectivity of the QMF, by calculating first-order entropy as well as rate-distortion theoretic performance of a two band QMF system, me find that practical QMF's do not suffer a significant information-theoretic loss with first-order autoregressive Gaussian sources. With second-order autoregressive sources pie find that practical QMF's suffer a notable information-theoretic loss when the bandwidth of the source is extremely narrow, but incur a small loss when the bandwidth is wider. We suggest that our results broadly apply to higher order autoregressive sources as well.

引用

页码：2094 / 2100

页数：7

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