Title :
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
fDate :
1/1/1995 12:00:00 AM
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;
Journal_Title :
Speech and Audio Processing, IEEE Transactions on
