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Performance Improvement of Perceptual Filter Using Noise Energy Control  

Seo Joung-Kook (숭실대학교 전자공학과)
Cha Hyung-Tai (숭실대학교 전자공학과)
Publication Information
The Journal of the Acoustical Society of Korea / v.24, no.1, 2005 , pp. 43-51 More about this Journal
Abstract
In this paper, we propose an algorithm that improves a tone quality of a noisy audio signal in order to enhance a Performance of perceptual filter using noise energy control. Most of the algorithms which were proposed by the other researchers usually applied a filter using the noise energy acquired from a silent range. In this case. the improvement rate of tone quality decreases if the noise energy is changed by the magnitude or environment variation in a signal frame. But the Proposed method Provides the means to find a food estimated noise through energy control of the estimated noise which is obtained from a silent range. Also we can get the enhancement of tone qualify in low frequency band unlike other methods. To show the performance of the Proposed algorithm, various input signals which had a different signal-to-noise ratio (SNR) such as 5dB, l0dB, 15dB and 20dB were used to test the proposed algorithm. With the proposed algorithm, we could confirm the enhancement of tone quality in terms of segmental SNR (SSNR). noise-to-mask ration (NMR) and mean opinion score (MOS) test.
Keywords
Excitation energy; Perceptual filter; Audio signal enhancement; Noise energy control;
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