Title :
Fast wavelet transforms based on the extended lapped transform
Author_Institution :
Dept. de Engenharia Electrica, Brasilia Univ., Brazil
fDate :
7/16/1992 12:00:00 AM
Abstract :
A new family of wavelet transforms (WTs) based on the extended lapped transform (ELT) is introduced. A new optimisation criterion for the ELT butterfly angles is presented, leading to ELT-based WTs with virtually the same performance but a much lower computational complexity than the standard maximally-regular WTs.
Keywords :
computational complexity; filtering and prediction theory; low-pass filters; optimisation; signal processing; speech analysis and processing; transforms; butterfly angles; computational complexity; extended lapped transform; frequency response; lowpass filter; optimisation criterion; signal decomposition; speech coding; two band filter banks; wavelet transforms;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19920886
