Published March 1, 1988
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Journal Article
Open
Polyphase networks, block digital filtering, LPTV systems, and alias-free QMF banks: a unified approach based on pseudocirculants
- Creators
-
Vaidyanathan, P. P.
- Mitra, Sanjit K.
Chicago
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Abstract
The relationship between block digital filtering and quadrature mirror filter (QMF) banks is explored. Necessary and sufficient conditions for alias cancellation in QMF banks are expressed in terms of an associated matrix, derived from the polyphase components of the analysis and synthesis filters. These conditions, called the pseudocirculant conditions, make it possible to unite QMF banks with the framework of block digital filtering directly. Absence of amplitude distortion in an alias-free QMF bank translates into the 'losslessness' property of the pseudocirculant matrix involved.
Additional Information
© Copyright 1988 IEEE. Reprinted with permission. Manuscript received May 18, 1987; revised September 18, 1987. This work was supported in part by the National Science Foundation under Grants DCI 855-2579 and DCI 850-8017 with matching funds from GEC and Pacific Bell, in part by Caltech's Programs in Advanced Technology Grant sponsored by Aerojet General, General Motors, GTE, and TRW, and in part by the National Science Foundation under Grant MIP 8604456.Files
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- Eprint ID
- 5488
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