Naslov
Design of low-delay nonuniform oversampled filterbanks

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

Izvornik
Signal processing (0165-1684) 88 (2008), 10; 2518-2525

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
nonuniform filterbanks; low-delay filterbanks; semidefinite programming; frequency sampling technique

Sažetak
Low-delay nonuniform oversampled filterbanks have a good applicability in real-time audio applications. An appealing trade-off between complexity and frequency division is obtained by using filterbanks having uniform sections generated by generalized DFT modulation, with transition filters between the uniform sections. We propose two methods for designing such filterbanks, with no restrictions on the widths of transition filters. The first method is iterative and each iteration consists of convex optimization problems. In the second, faster method, the transition filters are designed using a frequency sampling technique.We present an example of design showing the good results of the proposed methods.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

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