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Design of near-perfect reconstruction two-parallelogram filter-banks

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Title Design of near-perfect reconstruction two-parallelogram filter-banks
 
Creator PATWARDHAN, PG
GADRE, VM
 
Subject signal reconstruction
optimization
constraint theory
signal reconstruction
 
Description The design of nonseparable 2-D filter banks presents several difficulties, which do not arise in the 1-D counterparts. One particular aspect to be taken into consideration is the shape of the passbands of the filters. In the work of Lin and Vaidyanathan, a formulation of perfect-reconstruction (PR) cosine-modulated filter-banks (CMFBs) is proposed, with filters having a "two-parallelogram" (Two-P) support. The design problem is considerably simplified to the design of a single prototype-filter. In this letter, we extend the design method of Lin and Vaidyanathan to design near-perfect reconstruction (NPR) Two-P CMFBs, with the intention of trading off the PR property for filters with better stopband attenuation. We achieve NPR by optimization of the polyphase components of the prototype, imposing a "near power-complementary" constraint. We then demonstrate the better stopband attenuation achieved by the NPR design method, by comparing a PR and NPR design of a three-channel filter-bank.
 
Publisher IEEE
 
Date 2008-12-01T09:52:06Z
2011-11-25T16:18:18Z
2011-12-26T13:05:25Z
2011-12-27T05:52:18Z
2008-12-01T09:52:06Z
2011-11-25T16:18:18Z
2011-12-26T13:05:25Z
2011-12-27T05:52:18Z
2006
 
Type Article
 
Identifier IEEE Signal Processing Letters 13 (8), 489-92
1558-2361
http://dx.doi.org/10.1109/LSP.2006.874392
http://hdl.handle.net/10054/220
http://dspace.library.iitb.ac.in/xmlui/handle/10054/220
 
Language en_US