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.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
