Title :
Adaptive extended lapped transforms
Author :
De Queiroz, Ricardo L. ; Rao, K.R.
Author_Institution :
Electr. Eng. Dept., Texas Univ., Arlington, TX, USA
Abstract :
The perfect reconstruction conditions for a time-varying lapped transform are presented. Emphasis is placed on a class of cosine modulated filter banks known as the extended lapped transforms. A mechanism for achieving this error-free variation through the factorization of the transform matrix into sparse factors is presented along with a discussion of transition states. Some possible applications are indicated, including a structure for perfect reconstruction orthogonal time-varying wavelet packets.<>
Keywords :
adaptive filters; digital filters; matrix algebra; time-varying systems; wavelet transforms; cosine modulated filter banks; extended lapped transforms; factorization; orthogonal time-varying wavelet packets; perfect reconstruction conditions; time-varying lapped transform; transition states;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1993. ICASSP-93., 1993 IEEE International Conference on
Conference_Location :
Minneapolis, MN, USA
Print_ISBN :
0-7803-7402-9
DOI :
10.1109/ICASSP.1993.319474
