The generalized lapped transform (GLT) for subband coding applications

Author

Chan, S.C.

Author_Institution

Dept. of Electr. & Electron. Eng., Hong Kong Univ., Hong Kong

Volume

2

fYear

1995

fDate

9-12 May 1995

Firstpage

1508

Abstract

This paper proposes a new family of perfect reconstruction (PR) linear phase filter banks called the generalized lapped transform (GLT). The GLT differs from the traditional lapped orthogonal transform (LOT) in that it is nonorthogonal and hence offers more freedom to avoid blocking effects and improve the coding gain. Since the GLT can also be viewed as a generalization of the traditional discrete cosine transform (DCT), fast algorithms for their implementation are also available

Keywords

band-pass filters; delay circuits; filtering theory; signal reconstruction; transform coding; DCT; coding gain; discrete cosine transform; fast algorithms; generalized lapped transform; linear phase filter banks; nonorthogonal transform; perfect reconstruction filter banks; subband coding applications; Channel bank filters; Discrete cosine transforms; Discrete transforms; Filter bank; Finite impulse response filter; Image coding; Image reconstruction; Mirrors; Nonlinear filters; Phase modulation;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 1995. ICASSP-95., 1995 International Conference on

Conference_Location

Detroit, MI

ISSN

1520-6149

Print_ISBN

0-7803-2431-5

Type

conf

DOI

10.1109/ICASSP.1995.480571

Filename

480571