NOISE REDUCTION IN SPEECH PROCESSING USING IMPROVED ACTIVE NOISE CONTROL (ANC) TECHNIQUE

I. Nancy Catherine, S. Dhandapani

Abstract: An improved feed forward adaptive Active Noise Control (ANC) scheme is proposed by using Voice Activity Detector (VAD) and wiener filtering method. The ‘speech-plus-noise’ periods and ‘noise-only’ periods are separated using VAD and the unwanted noise is removed by adaptive filtering method. By using Speech Distortion Weighted- Multichannel Wiener Filtering (SDW-MWF) algorithm the noise periods which is present along with the speech signal, is processed and filtered out. The background noise along with the speech samples are removed by the iterative procedure of filtering process. Feed forward based ANC is used to achieve a system with a better noise reduction in speech processing. Adaptive filtering process is carried out and the speech signal without the background noise can be achieved.

Keywords: Active Noise Control (ANC), Noise reduction, Adaptive filtering, Feed forward ANC

DOI: https://doi.org/10.15623/ijret.2014.0303004