| 孙杨,原猛,冯海泓.一种基于统计模型的改进谱减降噪算法[J].声学技术,2013,32(2):115~118 |
| 一种基于统计模型的改进谱减降噪算法 |
| An improved statistical model-based spectral subtraction method for noisy speech |
| 投稿时间：2012-03-25 修订日期：2012-06-04 |
| DOI：10.3969/j.issn1000-3630.2013.02.009 |
| 中文关键词: 谱减法 统计模型 客观评价 主观评价 |
| 英文关键词: spectral subtraction statistical model subjective evaluation objective evaluation |
| 基金项目:国家自然科学基金(11104316)、上海自然科学基金(11ZR1446000)、中国科学院声学研究所所长择优创新基金(Y154221701)资助项目。 |
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| 中文摘要: |
| 提出了基于语音和噪声的傅里叶系数服从统计模型分布的假设,将基于统计模型的信噪比更新和噪声更新的方法应用于谱减法,试图解决传统谱减法中存在的音乐噪声和语音失真的问题。将提出算法与多通道谱减法和基于对数的最小均方幅度谱估计方法进行客观评价分析。利用频率加权分段信噪比评价方法、语音质量感知评价及综合质量测量等3种指标进行去噪效果评价。结果表明,所提出的基于统计模型的降噪算法效果优于MBSS,且接近Log-MMSE。 |
| 英文摘要: |
| A hypothesis that the Fourier transform coefficients of speech and noise are subject to different statistical model distributions is introduced. And the statistical model-based SNR (Signal to Noise Ratio) update and noise update method is proposed to solve the problem that traditional speech spectral subtraction method may introduce musical noise and speech distortion. Subjective evaluation is carried out to compare the performances of the proposed spectral subtraction method with two other noise reduction methods called MBSS (Multi-band Spectral Subtraction) and Log-MMSE (Minimum Mean-Square Error Log-spectral amplitude estimator). Three evaluation tools: Frequency Weighted Segmental SNR (FWSegSNR), Perceptual Evaluation of Speech Quality (PESQ) and Composite Quality Measure (CQM) are utilized. Evaluation results show that the noise reduction performance of the proposed method is better than MBSS, and close to Log-MMSE. |
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