Title :
Non-uniform bandwidth frequency-planar (NUB-FP) filter banks
Author :
Anderson, B. ; Bruton, L.T.
Author_Institution :
Dept. of Electr. & Comput. Eng., Calgary Univ., Alta., Canada
fDate :
6/24/1905 12:00:00 AM
Abstract :
A 3D non-uniform bandwidth frequency-planar (NUB-FP) filter bank structure is described, having a steady-state frequency response with a 3D stop band that approximates that of a wide band 3D cone. Equivalently, the 3D pass band ideally surrounds a 3D plane and has a 3D bandwidth that is approximately proportional to distance from the origin in the 3D frequency space. It is shown that the proposed NUB-FP filter bank is useful for the selective filtering of 3D spatio-temporal constant velocity signals (i.e. linear trajectory signals) and yields improved results over that of conventional 3D frequency-planar (FP) velocity filters. An example is given that yields improved moving high-frequency object details in a de-noised video sequence
Keywords :
FIR filters; IIR filters; band-pass filters; frequency response; image motion analysis; image sequences; multidimensional digital filters; video signal processing; 3D frequency space origin distance; 3D nonuniform bandwidth frequency planar filter bank; 3D pass band; 3D stop band; FP filters; NUB-FP; bandwidth; de-noised video sequence; frequency-planar velocity filters; high-frequency moving object details; linear trajectory signals; spatio-temporal constant velocity signal selective filtering; steady-state frequency response; surrounding 3D plane; wide band 3D cone; Band pass filters; Bandwidth; Channel bank filters; Filter bank; Filtering; Finite impulse response filter; Frequency; IIR filters; Shape; Wideband;
Conference_Titel :
Circuits and Systems, 2002. ISCAS 2002. IEEE International Symposium on
Conference_Location :
Phoenix-Scottsdale, AZ
Print_ISBN :
0-7803-7448-7
DOI :
10.1109/ISCAS.2002.1009964
