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Design of Two-Channel Linear Phase Orthogonal Cyclic Filterbanks

Motwani, Ravi and Ramakrishnan, KR (1998) Design of Two-Channel Linear Phase Orthogonal Cyclic Filterbanks. In: IEEE Signal Processing Letters, 5 (5). pp. 121-123.


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In this letter, we propose a method to design an orthonormal two channel cyclic filterbank (CFB) with real analysis and synthesis filters hating linear phase. This is particularly significant, since it is not possible to realize regular two- channel linear phase orthogonal filterbanks (unless the filters are two-tap). The lowpass filter of the FB is obtained as a spectral factor of a zero phase Nyquist(2) filter, which is optimized. We show that the CFB design is computationally less demanding as compared to the noncyclic case, and it may be possible to get better filters. We design the CFB for a particular case and show that this filterbank is not a noncyclic orthogonal filterbank.

Item Type: Journal Article
Publication: IEEE Signal Processing Letters
Publisher: IEEE
Additional Information: ©1998 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: cyclic filterbanks;paraunitary filterbanks;transform coders
Department/Centre: Division of Electrical Sciences > Electrical Engineering
Date Deposited: 25 Aug 2008
Last Modified: 19 Sep 2010 04:15
URI: http://eprints.iisc.ac.in/id/eprint/1474

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