BASIC STUDIES ON THE NOISE REDUCTION BY THE WAVELET TRANSFORM

• MIYAWAKI Kojiro

  THE JAPAN SOCIETY OF CIVIL ENGINEERS

• TOKI Kenzo

  THE JAPAN SOCIETY OF CIVIL ENGINEERS

Bibliographic Information

Other Title

• ウエブレット変換による雑音除去に関する基礎的研究
• ウエブレット ヘンカン ニ ヨル ザツオン ジョキョ ニ カンスル キソテキ ケンキュウ

Abstract

This paper deals with the noise reduction by the wavelet transform when the signal contain the noise of the impulsive and Gaussian components.In the case of the impulsive noise component, the algorithm of the noise reduction is the inverse finite impulsive response (IFIR). The estimate time of the IFIR is treated by the wavelet odd (or even) coefficients. On the other hand, the reduction of Gaussian noise component is carried out the treatment of low pass filter for the wavelet Fourier spectra. The effects of this method are investigated by the numerical calculation and are confirmed for the impulsive noise component. In addition, we apply the method for the seismic wave involved the impulsive noise and obtain the good results.

Journal

• Doboku Gakkai Ronbunshu

  Doboku Gakkai Ronbunshu 1999 (619), 169-176, 1999-04-21

  Japan Society of Civil Engineers

Keywords

• digital filter
• wavelet transform
• impulsive noise
• Gaussian noise
• noise reduction
• seismographic wave

Details

• CRID: 1390001205310126592
• NII Article ID: 130003983226
• NII Article ID: 10002529101
• NII Book ID: AN10014020
• DOI: 10.2208/jscej.1999.619_169
• ISSN: 18827187
• ISSN: 02897806
• NDL BIB ID: 4713582
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4713582
• Web Site: https://www.jstage.jst.go.jp/article/jscej1984/1999/619/1999_619_169/_pdf
• Data Source:
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  • CiNii Articles
• Abstract License Flag: Disallowed