Title :
Analytical optimization of CQF filter banks
Author :
Silva, Vitor ; De Sá, Luís
Author_Institution :
Dept. of Electr. & Electron. Eng., Coimbra Univ., Portugal
fDate :
6/1/1996 12:00:00 AM
Abstract :
The optimization of subband filter banks for signal and image coding is normally dealt with by numerical means. It is shown that this optimization can be done analytically in the case of the prototype four-tap causal conjugate quadrature filter (CQF). The coding gain and aliasing energy are considered in the optimization. Using parametrizations of the prototype filter coefficients, it was found that the optimal filter is the regular Daubechies D2 wavelet filter
Keywords :
band-pass filters; circuit optimisation; filtering theory; image coding; network parameters; wavelet transforms; CQF filter banks; Daubechies D2 wavelet; aliasing energy; causal conjugate quadrature filter; coding gain; four-tap CQF prototype filter; image coding; optimal filter; optimization; parametrizations; prototype filter coefficients; signal coding; subband filter banks; Channel bank filters; Compaction; Decorrelation; Delay; Discrete cosine transforms; Filter bank; Image coding; Pixel; Prototypes; Video coding;
Journal_Title :
Signal Processing, IEEE Transactions on
