Title :
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
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;
Conference_Titel :
Image Processing, 1997. Proceedings., International Conference on
Conference_Location :
Santa Barbara, CA
Print_ISBN :
0-8186-8183-7
DOI :
10.1109/ICIP.1997.632214
