APPARATUS AND METHOD TO REDUCE A NOISE FOR VOIP SERVICE

摘要

A noise removal apparatus for a VoIP(Voice over Internet Protocol) service and a method therefor are provided to remove a noise signal in consideration of an SNR(Signal-to-Noise Ratio) weight value. A power spectrum estimator(110) estimates a voice power spectrum and a noise power spectrum from a noise voice signal. A Wiener filter designing unit(120) calculates an SNR from the voice power spectrum and the noise power spectrum, acquires an SNR weight value corresponding to the calculated SNR, and designs a Wiener filter function which reflects the SNR weight value. A Wiener filter unit(130) removes a noise signal included in the noise voice signal by using the Wiener filter function.