Adaptive enhancement of Fourier spectra

Author

Chari, Venkatesh R. ; Espy-Wilson, Carol Y.

Author_Institution

Dept. of Electr. Comput. & Syst. Eng., Boston Univ., MA, USA

Volume

3

Issue

1

fYear

1995

fDate

1/1/1995 12:00:00 AM

Firstpage

35

Lastpage

39

Abstract

An adaptive enhancement procedure is presented which emphasizes continuant spectral features such as formant frequencies, by imposing frequency and amplitude continuity constraints on a short-time Fourier representation of the speech signal. At each point in the time-frequency field, the direction of maximum energy correlation is determined by the angle of a linear window at which the energy density within it is closest in magnitude to the point under consideration. Weighted smoothing is then performed in that direction to enhance continuant features

Keywords

Fourier transforms; adaptive signal processing; smoothing methods; spectral analysis; speech enhancement; Fourier spectra; adaptive enhancement; amplitude continuity constraints; continuant features enhancement; energy density; formant frequencies; frequency continuity constraints; linear window angle; maximum energy correlation; short-time Fourier representation; spectral features; speech signal; time-frequency field; weighted smoothing; Spectrogram; Speech enhancement; Systems engineering and theory; Time frequency analysis; Visualization;

fLanguage

English

Journal_Title

Speech and Audio Processing, IEEE Transactions on

Publisher

ieee

ISSN

1063-6676

Type

jour

DOI

10.1109/89.365383

Filename

365383