Integer to integer mapping wavelet filter bank with adaptive number of zero moments (CROSBI ID 473727)
Prilog sa skupa u zborniku | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Seršić, Damir
engleski
Integer to integer mapping wavelet filter bank with adaptive number of zero moments
An efficient realization of two-channel wavelet filter bank that maps integers to integers with adaptive number of zero moments is presented. Filters with more zero moments result in better representation of smooth parts of the analyzed signal, while less zero moments is better for transients and singularities. Proposed realization is based on the lifting scheme that enables mapping integer signals to integer wavelet coefficients, preserving perfect reconstruction property. The realization is derived from a method of fixed wavelet filter bank design, using Lagrange interpolation of samples in time domain. Adaptation criterion is computed from integer wavelet coefficients, which is under some restrictions reproducible on the reconstruction side. Quantization introduces non-predictable components of the wavelet coefficients, thus influencing behavior of the adaptation algorithm. Adaptation on interval is used to reduce variance of the filter parameters.
wavelets; integer to integer; adaptive; filter banks
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Podaci o prilogu
480-483-x.
2000.
objavljeno
Podaci o matičnoj publikaciji
Proceedings of ICASSP 2000 International Conference on Acoustics, Speech and Signal, vol.1 Processing
Ozturk, Y.
Istanbul:
Podaci o skupu
ICASSP 2000 International Conference on Acoustics, Speech and Signal Processing
poster
05.06.2000-09.06.2000
Istanbul, Turska