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Digital
Library of the European Council for Modelling
and Simulation |
Title: |
Combination Of Time-Frequency Representations For
Background Noise Suppression |
Authors: |
Eva Klejmova,
Jitka Pomenkova, Jiri Blumenstein |
Published in: |
(2017).ECMS 2017 Proceedings
Edited by: Zita Zoltay Paprika, Péter Horák, Kata Váradi, Péter Tamás
Zwierczyk, Ágnes Vidovics-Dancs, János Péter Rádics European Council for Modeling and Simulation. doi:10.7148/2017 ISBN:
978-0-9932440-4-9/ ISBN:
978-0-9932440-5-6 (CD) 31st European Conference on Modelling and
Simulation, Budapest, Hungary, May 23rd
– May 26th, 2017 |
Citation
format: |
Eva
Klejmova, Jitka Pomenkova, Jiri Blumenstein (2017). Combination Of
Time-Frequency Representations For Background Noise Suppression, ECMS 2017
Proceedings Edited by: Zita Zoltay Paprika, Péter Horák, Kata Váradi,
Péter Tamás Zwierczyk, Ágnes Vidovics-Dancs, János Péter Rádics
European Council for Modeling and Simulation. doi:
10.7148/2017-0093 |
DOI: |
https://doi.org/10.7148/2017-0093 |
Abstract: |
The
aim of the paper is to propose approach for enhancement of time-frequency
representation leading to the background noise suppression. The approach is
based on combination of continuous wavelet analysis, time-varying
autoregressive process and short time Fourier transform. By such combination
we make the identification of important areas in the time-frequency
representation easier. The proposed method is an alternative approach to
significance tests which can be problematic in some
cases. The performance of methods is presented on the gross domestic product
of the United Kingdom and Group of 7. The results show that in the UK, oil
crisis has a bigger impact compared to financial crisis, while from the
perspectives of G7 countries, the impact of financial crisis was stronger.
The obtained results can be also used for consequent econometric analysis which identify dependencies, relations, bilateral
causalities or other economic aspects. |
Full
text: |