UNSPECIFIED (2004) Design and VLSI implementation of QMF banks. IEE PROCEEDINGS-VISION IMAGE AND SIGNAL PROCESSING, 151 (5). pp. 421-427. ISSN 1350-245X

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Abstract

The authors consider the design of multirate filterbanks for applications such as subband coding with IIR QMF (quadrature mirror filter) pairs. These offer reduced complexity and low latency at the expense of the loss of exact linear phase. In particular, consideration is given to the use of all-pass sections where linear phase is approximately achieved by being part of the objective in numerical optimisation experiments. This approach compares favourably with previous IIR based approaches. Finite wordlength design using simulated annealing shows that low coefficient wordlength may be used. This leads to efficient realisations with three-port adaptors. Using pipelining implementation, a flexible VLSI architecture is designed that can be used for a variety of subband decompositions. Layout and simulation of the design have been performed.

Item Type:	Journal Article
Journal or Publication Title:	IEE PROCEEDINGS-VISION IMAGE AND SIGNAL PROCESSING
Publisher:	IEE-INST ELEC ENG
ISSN:	1350-245X
Date:	October 2004
Volume:	151
Number:	5
Number of Pages:	7
Page Range:	pp. 421-427
Publication Status:	Published
URI:	http://wrap.warwick.ac.uk/id/eprint/7563

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