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Proceedings Paper

Shuffle-based M-band filter bank design
Author(s): Hakan Caglar; Oktay Alkin; Emin Anarim; Bulent Sankur
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Paper Abstract

This paper presents a new design technique for obtaining optimum M channel orthogonal subband coders where M equals 2i. All filters that constitute the subband coder are FIR type filters with linear phase. We carry out the design in time domain, based on time domain orthonormality constraints that the filters must satisfy. Once a suitable low pass filter h0(n) is found, the remaining (M-1) filters of the coder are obtained through the use of shuffling operators on that filter. Since all resulting subband filters use the same numerical coefficient values (in different shift positions), this technique leads to a set of filters that can be implemented very efficiently. If, on the other hand, maximization of the coding gain is more important consideration than efficient implementation, the set of impulse responses obtained through shuffling can be further processed to remove the correlation between the subbands. This process leads to a new set of orthonormal linear phase filters that no longer share the same numerical coefficient values. In general, coding gain performance for this new set is better compared to the initial design. This uncorrelated decomposition can be thought of as counterpart of Karhunen-Loeve transform in an M channel filter bank.

Paper Details

Date Published: 16 September 1994
PDF: 11 pages
Proc. SPIE 2308, Visual Communications and Image Processing '94, (16 September 1994); doi: 10.1117/12.185993
Show Author Affiliations
Hakan Caglar, TUBITAK/Marmara Research Ctr. (Turkey)
Oktay Alkin, Southern Illinois Univ. (United States)
Emin Anarim, Bogazici Univ. (Turkey)
Bulent Sankur, Bogazici Univ. (Turkey)

Published in SPIE Proceedings Vol. 2308:
Visual Communications and Image Processing '94
Aggelos K. Katsaggelos, Editor(s)

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