Simplified design of low-delay oversampled NPR GDFT filterbanks (CROSBI ID 508218)
Prilog sa skupa u zborniku | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Dumitrescu, Bogdan ; Bregović, Robert ; Saramäki, Tapio
engleski
Simplified design of low-delay oversampled NPR GDFT filterbanks
We propose an efficient algorithm for designing the prototype filters of oversampled, near perfect reconstruction (NPR), GDFT modulated, biorthogonal filterbanks with arbitrary delay. Given the analysis prototype, we show that the minimization of the stopband energy of the synthesis prototype, subject to NPR constraints on the frequency response of the distortion transfer function, can be expressed as a convex optimization problem. Our algorithm consists of initialization with the prototype of an orthogonal filterbank and then successive optimization of the synthesis and analysis prototypes. We compare our algorithm with previous methods and give several design examples.
Filterbanks; GDFT; Nearly perfect-reconstruction
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Podaci o prilogu
525-528-x.
2005.
objavljeno
Podaci o matičnoj publikaciji
Proceedings of 2005 IEEE International Conference on Acoustic, Speech, and Signal Processing
Philadelphia (PA): Institute of Electrical and Electronics Engineers (IEEE)
Podaci o skupu
2005 IEEE International Conference on Acoustic, Speech, and Signal Processing
predavanje
18.03.2005-23.03.2005
Philadelphia (PA), Sjedinjene Američke Države