Title :
Efficient implementation of class of isotropic quadratic filters by using Walsh-Hadamard transform
Author :
Chan, Cheung-Fat
Author_Institution :
Dept. of Electron. Eng., City Univ. of Hong Kong, Kowloon, Hong Kong
fDate :
8/5/1999 12:00:00 AM
Abstract :
A method is proposed for the efficient implementation of a class of second-order Volterra filters where their quadratic kernels are recursively constructed from a set of isotropic subkernels (ISKs). The quadratic kernel of this class of filters can be factorised into a diagonal form by a Walsh-Hadamard transform (WHT) and be implemented using a transform and multiply structure. An algorithm for determining the quadratic ISK kernel for the nonlinear prediction of speech signals is presented
Keywords :
Hadamard transforms; Walsh functions; filtering theory; prediction theory; speech processing; Walsh-Hadamard transform; isotropic quadratic filters; isotropic subkernels; multiply structure; nonlinear prediction; quadratic kernels; second-order Volterra filters; speech signals;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19990867
