DocumentCode :
3374588
Title :
Smart noise reduction system based on ALE and noise reconstruction system
Author :
Sasaoka, Naoto ; Itoh, Yoshio ; Fujii, Kensaku ; Fukui, Yutaka
Author_Institution :
Fac. of Eng., Tottori Univ., Japan
Volume :
5
fYear :
2004
fDate :
23-26 May 2004
Abstract :
The noise reduction technique to reduce wideband and sinusoidal noise in noisy speech is proposed. We have proposed the noise reconstruction system (NRS) using the linear prediction error filter (LPEF) and system identification model. However, since the sinusoidal noise has the characteristic just like the vowel, the conventional system cannot reduce the sinusoidal noise. We introduce the adaptive line enhancer (ALE) to reduce the sinusoidal noise. The ALE estimates a current signal correlated with a delayed signal. The speech signal is nonstationary signal in long time interval. On the other hand, the sinusoidal noise is stationary noise. For example, ventilating fan and engine noise. So the autocorrelation of the sinusoidal noise is maintained although that of the speech signal fades. Thus the ALE can estimate only the sinusoidal noise. Therefore, the noise reduction system based on the ALE and the NRS reduces not only the wideband noise but also the sinusoidal noise.
Keywords :
correlation methods; filtering theory; signal denoising; signal reconstruction; speech processing; adaptive line enhancer; delayed signal; engine noise; linear prediction error filter; long time interval; noise reconstruction system; noisy speech; nonstationary signal; signal correlation; signal estimation; sinusoidal noise autocorrelation; sinusoidal noise estimation; sinusoidal noise reduction; smart noise reduction system; speech signal; stationary noise; system identification model; ventilating fan; wideband noise reduction; Autocorrelation; Delay estimation; Engines; Line enhancers; Noise reduction; Nonlinear filters; Predictive models; Speech enhancement; System identification; Wideband;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Circuits and Systems, 2004. ISCAS '04. Proceedings of the 2004 International Symposium on
Print_ISBN :
0-7803-8251-X
Type :
conf
DOI :
10.1109/ISCAS.2004.1329609
Filename :
1329609
Link To Document :
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