Method of optimal directions for frame design

Author

Engan, Kjersti ; Aase, Sven Ole ; Hakon Husoy, J.

Author_Institution

Dept. of Electr. & Comput. Eng., Hogskolen i Stavanger, Stavanger, Norway

Volume

5

fYear

1999

fDate

1999

Firstpage

2443

Abstract

A frame design technique for use with vector selection algorithms, for example matching pursuits (MP), is presented. The design algorithm is iterative and requires a training set of signal vectors. The algorithm, called method of optimal directions (MOD), is an improvement of the algorithm presented by Engan, Aase and Husoy see (Proc. ICASSP ´98, Seattle, USA, p.1817-20, 1998). The MOD is applied to speech and electrocardiogram (ECG) signals, and the designed frames are tested on signals outside the training sets. Experiments demonstrate that the approximation capabilities, in terms of mean squared error (MSE), of the optimized frames are significantly better than those obtained using frames designed by the algorithm of Engan et. al. Experiments show typical reduction in MSE by 20-50%

Keywords

electrocardiography; iterative methods; mean square error methods; medical signal processing; optimisation; speech processing; ECG signal; MSE reduction; electrocardiogram; experiments; frame design; iterative design algorithm; matching pursuits; mean squared error; method of optimal directions; optimal directions; optimized frames; signal vectors; speech signal; training set; vector selection algorithms; Algorithm design and analysis; Approximation algorithms; Design optimization; Electrocardiography; Iterative algorithms; Matching pursuit algorithms; Pursuit algorithms; Signal design; Speech; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 1999. Proceedings., 1999 IEEE International Conference on

Conference_Location

Phoenix, AZ

ISSN

1520-6149

Print_ISBN

0-7803-5041-3

Type

conf

DOI

10.1109/ICASSP.1999.760624

Filename

760624