A real time spectral subtraction based speech enhancement scheme

Author

Flogeras, D. ; Doraiswami, R. ; Kaye, M.E.

Author_Institution

Dept. of Electr. & Comput. Eng., New Brunswick Univ., Fredericton, NB, Canada

Volume

2

fYear

2003

fDate

4-7 May 2003

Firstpage

1071

Abstract

Various speech enhancement schemes are analyzed in terms of the conflicting real time requirements of computational delay, robustness and accuracy. A spectral subtraction scheme is found to be implementable in real time using the available digital processing board. The tasks such as the computation of the spectral contents of the speech plus noise and the noise, smoothing the estimates, and speech enhancement filtering are implemented in the frequency domain using FFT in view of the computational speed and robustness. A variant of a spectral subtraction scheme is implemented in real time on a DSP board and its performance is evaluated.

Keywords

digital signal processing chips; fast Fourier transforms; spectral analysis; speech enhancement; FFT; computational delay; digital processing board; real time implementation; spectral estimation; spectral subtraction scheme; speech enhancement filtering; speech plus noise; Amplitude estimation; Filtering; Frequency estimation; Linear predictive coding; Niobium; Noise robustness; Predictive models; Real time systems; Speech analysis; Speech enhancement;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical and Computer Engineering, 2003. IEEE CCECE 2003. Canadian Conference on

ISSN

0840-7789

Print_ISBN

0-7803-7781-8

Type

conf

DOI

10.1109/CCECE.2003.1226081

Filename

1226081