Analytical optimization of CQF filter banks

Author

Silva, Vitor ; De Sá, Luís

Author_Institution

Dept. of Electr. & Electron. Eng., Coimbra Univ., Portugal

Volume

Issue

fYear

1996

fDate

6/1/1996 12:00:00 AM

Firstpage

1564

Lastpage

1568

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;

fLanguage

English

Journal_Title

Signal Processing, IEEE Transactions on

Publisher

ieee

ISSN

1053-587X

Type

jour

DOI

10.1109/78.506623

Filename

506623

Link To Document

https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=1057066