VoIP 환경에서의 잡음제거를 위한 최적화된 위너 필터Optimized Wiener Filter for Noise Reduction in VoIP Environments

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Noise reduction technologies are indispensable to achieve acceptable speech quality in VoIP systems. This paper proposes a Wiener filter optimized to the estimated SNR of noisy speech for the noise reduction in VoIP environments. The proposed noise canceller is applied as a pre-processor before speech encoding. The performance of the proposed method is evaluated by the PESQ in various noisy conditions. In this paper, the proposed algorithm is applied to G.711, G.723.1, and G.729A which are all VoIP speech codecs. The PESQ results show that the performance of our proposed noise reduction scheme outperforms those of the noise suppression in the IS-127 EVRC and the ETSI standard for the advanced distributed speech recognition front-end.
Publisher
한국음성학회
Issue Date
2007-12
Keywords

noise reduction; speech enhancement; voice over IP; speech codec

Citation

대한음성학회지 말소리, Vol.64, pp.105-119

ISSN
1226-1173
URI
http://hdl.handle.net/10203/25451
Appears in Collection
EE-Journal Papers(저널논문)
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