| 一种基于噪声估计的语音激活检测算法 |
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| 引用本文： | 李光源,崔慧娟,唐昆.一种基于噪声估计的语音激活检测算法[J].信息技术,2011(10):5-8. |
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| 作者姓名： | 李光源 崔慧娟 唐昆 |
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| 作者单位： | 清华大学电子工程系清华信息科学与技术国家实验室,北京,100084 |
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| 基金项目： | 国家自然科学基金项目(60572081) |
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| 摘 要： | 针对当前语音激活检测算法在低信噪比和复杂噪声模型的环境下性能损失的问题,提出了一种基于噪声估计的语音激活检测算法,通过对背景噪声进行自适应估计,得到准确的信噪比门限,同时利用估计背景噪声对短时谱进行白化处理,从而使得谱熵判决准则得以适用于复杂噪声模型的环境。实验证明,算法在低信噪比和复杂噪声模型下性能优于G.729B和AMR中的语音激活检测算法。
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| 关 键 词： | 语音激活检测 噪声估计 信噪比 谱熵 白化滤波 |
An algorithm of voice activity detection based on noise estimation |
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| LI Guang-yuan,CUI Hui-juan,TANG Kun.An algorithm of voice activity detection based on noise estimation[J].Information Technology,2011(10):5-8. |
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| Authors: | LI Guang-yuan CUI Hui-juan TANG Kun |
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| Affiliation: | LI Guang-yuan,CUI Hui-juan,TANG Kun(Tsinghua National Laboratory for Information Science and Technology,Department of Electronic Engineering,Tsinghua University,Beijing 100084,China) |
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| Abstract: | In the condition of low signal to noise ratio(SNR) and complex noise model,the performance of the voice activity detection(VAD) algorithms always becomes poor.This paper presents a new VAD algorithm based on noise estimation.Through the adaptive noise estimation,the accurate SNR threshold is decided.Then,after applying whitening filter to short time spectra the spectral entropy can be used to VAD algorithm in complex noise model.The experimental results show that the proposed algorithm gets better performan... |
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| Keywords: | voice activity detection noise estimation signal to noise ratio spectral entropy whitening filter |
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