Naslov
Simplified design of low-delay oversampled NPR GDFT filterbanks

Autori
Dumitrescu, Bogdan ; Bregović, Robert ; Saramäki, Tapio

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of 2005 IEEE International Conference on Acoustic, Speech, and Signal Processing / - Philadelphia (PA) : Institute of Electrical and Electronics Engineers (IEEE), 2005, 525-528

Skup
2005 IEEE International Conference on Acoustic, Speech, and Signal Processing

Mjesto i datum
Philadelphia (PA), Sjedinjene Američke Države, 18.03.2005. - 23.03.2005

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Filterbanks; GDFT; Nearly perfect-reconstruction

Sažetak
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.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

POVEZANOST RADA