Title :
3-D IIR filtering using decimated DFT-polyphase filter bank structures
Author :
Kuenzle, B. ; Bruton, Len T.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Calgary, Alta., Canada
Abstract :
Two three-dimensional (3-D) under-decimated uniform discrete Fourier transform polyphase filter bank structures are proposed along with two applications: first, the sub-pixel motion discrimination of two-dimensional spatial objects moving with approximately constant local velocity in a noisy 3-D spatio-temporal image sequence and, second, the selective filtering of 3-D spatio-temporal broad-band plane waves based on their directions of arrival. The desired 3-D filter passband shapes are realized utilizing combinations of highly selective first-order 3-D infinite-impulse response frequency-planar filters in each band between the analysis and synthesis sections. Measured spatio-temporal performance confirms the high-quality broad-band transmission of passband signals, high directional selectivity and low computational complexity.
Keywords :
IIR filters; channel bank filters; discrete Fourier transforms; image sequences; multidimensional digital filters; 2D spatial objects; 3D IIR filtering; 3D filter passband shapes; 3D infinite-impulse response frequency-planar filters; 3D spatio-temporal broad-band plane waves; decimated DFT-polyphase filter bank structures; discrete Fourier transform; noisy 3D spatiotemporal image sequence; selective filtering; sub-pixel motion discrimination; Band pass filters; Discrete Fourier transforms; Filter bank; Filtering; Frequency synthesizers; IIR filters; Image sequences; Noise shaping; Passband; Shape; Discrete Fourier transform (DFT)-polyphase filter bank; linear trajectory (LT) signal; plane wave; three-dimensional (3-D) filter;
Journal_Title :
Circuits and Systems I: Regular Papers, IEEE Transactions on
DOI :
10.1109/TCSI.2005.856663