基于自适应逼近残差的稀疏表示语音降噪方法

周伟力; 贺前华; 王亚楼; 庞文丰

doi:10.11999/JEIT160369

基于自适应逼近残差的稀疏表示语音降噪方法

doi: 10.11999/JEIT160369

基金项目:

国家自然科学基金(61571192)，广东省公益项目(2015A010103003)

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- 被引次数: 9
出版历程
- 收稿日期: 2016-04-18
- 修回日期: 2016-08-25
- 刊出日期: 2017-02-19

Adapted Stopping Residue Error Based Sparse Representation for Speech Denoising

Funds:

The National Natural Science Foundation of China (61571192), The Science and Technology Foundation of Guangdong Province (2015A010103003)

摘要

摘要: 该文提出一种基于自适应逼近残差的稀疏表示语音降噪方法。在字典学习阶段基于K奇异值分解(K-Singular Value Decomposition, K-SVD)算法获得干净语音谱的过完备字典，在稀疏表示阶段基于权重因子调整后的噪声谱和估计的交叉项对逼近残差持续自适应地更新，并采用正交匹配追踪(Orthogonal Matching Pursuit, OMP)方法对干净语音谱进行稀疏重构。最后结合估计的干净语音谱与带噪语音相位，通过傅里叶逆变换获得重构的干净语音。实验结果表明所提方法在不同噪声和信噪比条件下相比标准的谱减法，稀疏表示语音降噪算法和基于自回归隐马尔可夫模型的降噪方法有更好的降噪效果。
- 语音降噪 /
- 稀疏表示 /
- K奇异值分解 /
- 正交匹配追踪
Abstract: A sparse representation speech denoising method based on adapted stopping residue error is proposed. Firstly, an over complete dictionary of the clean speech power spectrum is learned by the K-Singular Value Decomposition (K-SVD) algorithm. In the sparse representation stage, the stopping residue error is adaptively achieved according to the estimated cross terms and the noise spectrum which is adjusted by a weighted factor, and the Orthogonal Matching Pursuit (OMP) approach is applied to reconstruct the clean speech spectrum from the noisy speech. Finally, the clean speech is re-synthesis via the inverse Fourier transform with the reconstructed speech spectrum and the noisy speech phase. The experiment results show that the proposed method outperforms the standard spectral subtraction, sparse representation based speech denoising algorithm and the AutoRegressive Hidden Markov Model (AR-HMM) based speech denoising method in terms of subjective and objective measure.
- Speech denoising /
- Sparse representation /
- K-Singular Value Decomposition (K-SVD) /
- Orthogonal Matching Pursuit (OMP)

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参考文献(21)

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