Wiener Filtering with Spectrum Estimation by Wavelet Transformation

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26220%2F01%3APU20798" target="_blank" >RIV/00216305:26220/01:PU20798 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Wiener Filtering with Spectrum Estimation by Wavelet Transformation
Original language description
Current methods used to improve the signal?to?noise ratio mainly employ the Wiener filtering, or methods derived from it, such as spectral subtraction. All these methods assume that it is possible to determine or at least to estimate noise spectral characteristics. As can be derived, the estimation by the periodogram is not exact, but it contains a disturbance. Averaging the power spectra offers better results but the properties are simultaneously downgraded by a non-stationary disturbance. That is whythe paper deals with the improvement of the power spectral density (PSD) estimation. To achieve this purpose we use the method of thresholding wavelet?transform coefficients, which we apply to each periodogram separately. Then the resultant estimation isused for the Wiener filter. The differences between the estimations obtained by the periodogram, by averaging and by this new method are shown in the paper. When we use wavelet transformation, a marked improvement in suppressing the dist
Czech name
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Czech description
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Project
<a href="/en/project/GA102%2F00%2F1084" target="_blank" >GA102/00/1084: RTD technology of sound separation from speech hidden in noise</a><br>
Continuities
Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year
2001
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
Proceedings of International Conference on Trends in Communications
ISBN
0-7803-6490-2
ISSN
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e-ISSN
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Number of pages
4
Pages from-to
471-474
Publisher name
FEI STU
Place of publication
Bratislava, Slovensko
Event location
Bratislava
Event date
Jul 4, 2001
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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