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A time-frequency combination adaptive threshold algorithm of wavelet package de-noising
Author(s): TIAN Yujing, DONG Yumin, ZUO Hongwei
Pages: 256-
262
Year: 2010
Issue:
4
Journal: Applied Acoustics
Keyword: 小波包消噪; 自适应阈值算法; 时频结合; Bark尺度;
Abstract: 在充分考虑人耳听觉特性和噪声统计特性的基础上,提出一种时频结合Bark尺度自适应阈值的语音消噪算法,在Bark频域上自适应调整增强系数可以较准确地进行阈值判定.仿真实验验证,时频结合算法在低信噪比输入情况下较传统语音降噪方法具有明显优势,其在消除高斯白噪声的同时有效降低了语音损失,可获得最大信噪比,谱失真测度最小,增强语音的MOS(Mean Opinion Score)评分明显提高,具有较好的听觉...
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