Naslov
Low-delay nonuniform oversampled filterbanks for acoustic echo control

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

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

Izvornik
Proceedings of the European Signal Processing Conference EUSIPCO-2006, / - Firenza : München, 2006

Skup
EUSIPCO-2006

Mjesto i datum
Firenca, Italija, 04.09.2006. - 08.09.2006

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
filterbanks; low delay; echo control

Sažetak
We propose an algorithm for designing nonuniform oversampled filterbanks with arbitray delay. The filterbank has uniform sections obtained by generalized DFT modulation ; between the uniform sections, there are transition filters. There is no a priori constraint on the widths of transition filters channels, as in previous publications. The design algorithm is composed of three steps, in which a bank (analysis or synthesis) is optimized by solving convex optimization problems for finding the prototypes of uniform sections and the transition filters. In the first step, an orthogonal filterbank is designed, while in the other steps a bank is given and the other is optimized. We present an example of design suitable to subband processing of wideband speech signals.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

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