Variable block size adaptive lapped transform-based image coding

Author

Klausutis, Timothy J. ; Madisetti, Vijay K.

Author_Institution

Centre for Signal & Image Process., Georgia Inst. of Technol., Atlanta, GA, USA

Volume

3

fYear

1997

Firstpage

686

Abstract

A new adaptive lapped transform (ALT) structure is introduced to implement time-varying linear-phase paraunitary and biorthogonal filter banks. The new ALT is based on the generalized lapped transform (GLT). A time-varying filter bank is constructed through the factorization of the GLT into cascaded matrix stages. Variable-length LTs are subsequently generated by cascading a number of these matrix stages to build specific length filters. A fixed and variable block size embedded ALT image codec is presented

Keywords

adaptive codes; band-pass filters; codecs; filtering theory; image coding; image reconstruction; matrix algebra; time-varying filters; transform coding; biorthogonal filter banks; cascaded matrix stages; fixed block size embedded image codec; generalized lapped transform; image coding; linear-phase paraunitary filter banks; perfect reconstruction filter banks; time-varying filter banks; variable block size adaptive lapped transform; variable length lapped transforms; Codecs; Delay; Discrete cosine transforms; Filter bank; Finite impulse response filter; Image coding; Image processing; Signal processing; Symmetric matrices; Time domain analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Image Processing, 1997. Proceedings., International Conference on

Conference_Location

Santa Barbara, CA

Print_ISBN

0-8186-8183-7

Type

conf

DOI

10.1109/ICIP.1997.632214

Filename

632214