An efficient approach for designing nearly perfect-reconstruction cosine-modulated and modified DFT filter banks (CROSBI ID 481587)
Prilog sa skupa u zborniku | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Saramäki, Tapio ; Bregović, Robert
engleski
An efficient approach for designing nearly perfect-reconstruction cosine-modulated and modified DFT filter banks
Efficient two-step algorithms are described for optimizing the stopband response of the prototype filter for cosine-modulated and modified DFT filter banks either in the minimax or in the least-mean-square sense subject to the maximum allowable aliasing and amplitude errors. The first step involves finding a good start-up solution using a simple technique. This solution is improved in the second step by using nonlinear optimization. Several examples are included illustrating the flexibility of the proposed approach for making compromises between the required filter lengths and the aliasing and amplitude errors. These examples show that by allowing very small amplitude and aliasing errors, the stopband performance of the resulting filter bank is significantly improved compared to the corresponding perfect-reconstruction filter bank. Alternatively, the filter orders and, consequently, the overall delay can be significantly reduced to achieve practically the same performance.
filter bank; cosine-modulation; MDFT; nearly perfect-reconstruction
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Podaci o prilogu
3617-3620-x.
2001.
objavljeno
Podaci o matičnoj publikaciji
Proceeding of ICASSP2001 - IEEE Conference on Accouustic, Speech, and Signal Processing
Salt Lake City (UT): Institute of Electrical and Electronics Engineers (IEEE)
Podaci o skupu
ICASSP 2001 - IEEE Conference on Accouustic, Speech, and Signal Processing
poster
07.05.2001-11.05.2001
Salt Lake City (UT), Sjedinjene Američke Države