A new approach to synthesize sharp 2D half-band filters

The frequency-response masking method is an efficient technique for the realization of sharp, one-dimensional filters. Recently, this technique has been extended to the synthesis of sharp two-dimensional (2D) filters. While it has been demonstrated that sharp diamond-shaped filters may be realized e...

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Bibliographic Details
Published in:IEEE transactions on circuits and systems. 2, Analog and digital signal processing Analog and digital signal processing, 1999-08, Vol.46 (8), p.1104-1110
Main Authors: Seo How Low, Yong Ching Li
Format: Article
Language:English
Subjects:
Computational complexity
Digital signal processing
Filtering
Finite impulse response filter
Frequency synthesizers
Image processing
Interpolation
Lattices
Sampling methods
Two dimensional displays
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Summary:The frequency-response masking method is an efficient technique for the realization of sharp, one-dimensional filters. Recently, this technique has been extended to the synthesis of sharp two-dimensional (2D) filters. While it has been demonstrated that sharp diamond-shaped filters may be realized efficiently, the techniques previously presented cannot be applied to the synthesis of 2D half-band filters. In this brief we propose a modification of the technique for the synthesis of sharp 2D half-band diamond-shaped filters. In addition, by exploiting the special properties of 2D half-band filters, the complexities of the band-edge shaping and masking filters are further reduced. This results in a very efficient implementation of 2D half-band diamond-shaped filters.
ISSN:1057-7130
1558-125X
DOI:10.1109/82.782061