Title :
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
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;
Conference_Titel :
Electrical and Computer Engineering, 2003. IEEE CCECE 2003. Canadian Conference on
Print_ISBN :
0-7803-7781-8
DOI :
10.1109/CCECE.2003.1226081
