Naslov
A realization of wavelet filter bank with adaptive filter parameters

Autori
Seršić, Damir

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

Izvornik
Proceedings of EUSPICO 2000 – X European Signal Processing Conference / Gabbouj M., Kuosmanen P. - Tampere, 2000, Vol. III, pp. 1733-1736

Skup
EUSPICO 2000 – X European Signal Processing Conference

Mjesto i datum
Tampere, Finska, 04.09.2000. - 08.09.2000

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
wavelet filter banks; adaptive filters

Sažetak
In this paper, an efficient realization of the two-channel wavelet filter bank with adaptive filter parameters is proposed. Described time variant wavelet filter bank is more suitable for analysis of non-stationary signals then fixed banks. Basic convergence and regularity properties of the limit wavelet functions and scales are provided by fixed part of the filter bank. Variable part adapts to the analyzed signal. Proposed filter bank combines sub-band decomposition and parametric modeling. Realization is based on the lifting scheme, derived from a method of fixed wavelet filter bank design. Original Lagrange interpolation of samples in the time domain is modified to an approximation scheme that is recomputed at each step of decomposition. Adaptation criterion is calculated from wavelet coefficients, which is under some restrictions reproducible on the reconstruction side. Wavelet filter banks with adaptive filter parameters can outperform fixed banks in a number of applications.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

POVEZANOST RADA