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http://dx.doi.org/10.5370/KIEE.2015.64.12.1756

An Adaptive Wind Noise Reduction Method Based on a priori SNR Estimation for Speech Eenhancement  

Seo, Ji-Hun (Dept. of Computer science, Sangmyung University)
Lee, Seok-Pil (Dept. of Media software, Sangmyung University)
Publication Information
The Transactions of The Korean Institute of Electrical Engineers / v.64, no.12, 2015 , pp. 1756-1760 More about this Journal
Abstract
This paper focuses on a priori signal to noise ratio (SNR) estimation method for the speech enhancement. There are many researches for speech enhancement with several ambient noise cancellation methods. The method based on spectral subtraction (SS) which is widely used in noise reduction has a trade-off between the performance and the distortion of the signals. So the need of adaptive method like an estimated a priori SNR being able to making a high performance and low distortion is increasing. The decision directed (DD) approach is used to determine a priori SNR in noisy speech signals. A priori SNR is estimated by using only the magnitude components and consequently follows a posteriori SNR with one frame delay. We propose a modified a priori SNR estimator and the weighted rational transfer function for speech enhancement with wind noises. The experimental result shows the performance of our proposed estimator is better Perceptual Evaluation of Speech Quality scores (PESQ, ITU-T P.862) compare to the conventional DD approach-based systems and different noise reduction methods.
Keywords
Noise reduction; A priori SNR; Speech enhancement;
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