| 噪声鲁棒的动态范围压扩算法 |
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| 引用本文： | 翁海波,梁维谦.噪声鲁棒的动态范围压扩算法[J].电声技术,2010,34(6):69-71,76. |
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| 作者姓名： | 翁海波 梁维谦 |
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| 作者单位： | 1. 清华大学,微电子所,北京,100084
2. 清华大学,电子工程系,北京,100084 |
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| 基金项目： | 国家高技术研究发展计划(863计划)重点项目 |
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| 摘 要： | 结合基于递归平均的噪声估计算法和动态范围压扩算法，提出了一种动态调整噪声抑制临界点的动态范围压扩算法。通过对噪声水平的动态估计，实时调整噪声抑制阈值，在进行听力补偿的同时进一步提高信噪比，避免了动态范围压扩算法在放大语音的同时，噪声也被放大的问题。试验结果表明，该方法在4种不同的噪声环境下，进行听力补偿之后，相对于典型的动态范围压扩算法，信噪比平均提高约9．7dB。
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| 关 键 词： | 动态范围压扩 递归平均噪声估计 动态噪声阚值 |
A Noise-robust Dynamic Range Compression Algorithm |
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| WENG Hai-bo,LIANG Wei-qian.A Noise-robust Dynamic Range Compression Algorithm[J].Audio Engineering,2010,34(6):69-71,76. |
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| Authors: | WENG Hai-bo LIANG Wei-qian |
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| Affiliation: | 1. Institute of Microelectronics, Tsinghua University, Beijing 100084, China; 2. Department of Electronic Engineering, Tsinghua University, Beijing 100084, China) |
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| Abstract: | An adaptive noise threshold dynamic range compression method is proposed, based on time-recursive averaging noise estimation and dynamic range compression algorithm. Through estimating noise level dynamically, noise reduction threshold is adjusted in real time. Adaptive noise threshold method, by time-recursive averaging noise estimation, can avoid amplifying noise when compensating for the reduced dynamic range. The simulation results show that, in 4 different noise environments, compared to a typical dynamic range compression algorithm, after the hearing compensation, the method can improve the signal to noise ratio of about 9.7 dB. |
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| Keywords: | dynamic range compression time-recursive averaging noise estimation dynamic noise threshold |
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