Title :
Two dimensional nonseparable modulated filter banks
Author_Institution :
Dept. of Electron. Eng., City Polytech. of Hong Kong, Kowloon, Hong Kong
Abstract :
It is well known that efficient perfect reconstruction (PR) FIR filter banks can be obtained by modulating a prototype filter. We present a class of two-dimensional nonseparable rectangular sampling PR modulated filter banks. The modulation is constrained to be separable while the prototype filter is allowed to be nonseparable. This lead to considerably simplification in the PR condition and design procedure. The resulting PR condition on the prototype is equivalent to the 4 channels PR property of a set of polyphase components. A design example of a 4-channel length (8×8) orthogonal nonseparable filter is also given to illustrate the proposed method
Keywords :
FIR filters; band-pass filters; modulation; signal reconstruction; signal sampling; two-dimensional digital filters; 2D nonseparable modulated filter banks; FIR filter banks; modulated filter banks; modulation; orthogonal nonseparable filter; perfect reconstruction; polyphase components; prototype filter; rectangular sampling; Channel bank filters; Cities and towns; Design engineering; Filter bank; Finite impulse response filter; Image reconstruction; Lattices; Mirrors; Prototypes; Sampling methods;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1994. ICASSP-94., 1994 IEEE International Conference on
Conference_Location :
Adelaide, SA
Print_ISBN :
0-7803-1775-0
DOI :
10.1109/ICASSP.1994.390070
