Noise reduction using three-step gain factor and iterative-directional-median filter

ASIAIR > College of Management > Department of International Business > Journal Artical > Item 310904400/79816

Please use this identifier to cite or link to this item: http://asiair.asia.edu.tw/ir/handle/310904400/79816

Title:	Noise reduction using three-step gain factor and iterative-directional-median filter
Authors:	陸清達;Lu, Ching-Ta
Contributors:	資訊傳播學系
Keywords:	Speech enhancement;Post processing;Musical residual noise;Spectral subtraction;Median filter
Date:	2014-02
Issue Date:	2014-06-05 04:13:40 (UTC+0)
Abstract:	Musical residual noise is a major problem for a speech enhancement system. This noise is very annoying to the human ear and can significantly deteriorate the perception quality of enhanced speech. In this study, we aim at reducing the quantity of musical residual noise by a two-stage speech enhancement approach. In the first stage a preprocessor enhances noisy speech using an algorithm which combines the two-step-decision-directed and the Virag methods. In the second stage the enhanced speech signal is post-processed by an iterative-directional-median filter to significantly reduce the quantity of residual noise, while maintaining the harmonic spectra. Experimental results show that the proposed approach can significantly improve the performance of a speech enhancement system by reducing the quantity of residual noise.
Relation:	APPLIED ACOUSTICS
Appears in Collections:	[Department of International Business] Journal Artical

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