Linear-phase paraunitary filter banks with unequal length

Author

Kuroko, Takehito ; Urushibara, Toshichika ; Ikehara, Masaaki

Author_Institution

Dept. of Electr. Eng., Keio Univ., Yokohama, Japan

Volume

2

fYear

2000

fDate

10-13 Sept. 2000

Firstpage

407

Abstract

We present a design and implementation of M-channel linear-phase paraunitary filter banks (LPPUFB) with unequal length filters and same center points. Our main motivation is the application in effective image coding. For low-frequency signals, long basis functions should be used to avoid the blocking effect. While, short basis functions should be used to reduce the ringing noise for high-frequency signals. LPPUFB with such characteristics can be achieved structurally by taking account of the lattice structure. Finally some design examples are shown.

Keywords

channel bank filters; image coding; lattice filters; linear phase filters; M-channel paraunitary filter banks; blocking effect; filter design; image coding; lattice structure; linear-phase paraunitary filter banks; long basis functions; low-frequency signals; ringing noise; short basis functions; unequal length filters; Channel bank filters; Design methodology; Discrete cosine transforms; Filter bank; Image coding; Image processing; Image reconstruction; Lattices; Low-frequency noise; Noise reduction;

fLanguage

English

Publisher

ieee

Conference_Titel

Image Processing, 2000. Proceedings. 2000 International Conference on

Conference_Location

Vancouver, BC, Canada

ISSN

1522-4880

Print_ISBN

0-7803-6297-7

Type

conf

DOI

10.1109/ICIP.2000.899411

Filename

899411