基于新型混合模型的欠定盲分离方法

陈永强; 王宏霞

doi:10.3724/SP.J.1004.2014.01412

基于新型混合模型的欠定盲分离方法

doi: 10.3724/SP.J.1004.2014.01412

陈永强^1,2,
王宏霞¹

1.
西南交通大学信息科学与技术学院成都 610031;
2.
成都信息工程学院电子实验中心成都 610225

基金项目:

国家自然科学基金（61170226），中央高校基本科研业务费专项资金（SWJTU11CX047，SWJTU12ZT02），四川省青年科技创新研究团队项目（2011JTD0007）资助

详细信息

作者简介:
王宏霞西南交通大学信息科学与技术学院教授. 主要研究方向为多媒体信息安全，数字水印与取证，语音和音频信号处理. E-mail：hxwang@swjtu.edu.cn.

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- 文章访问数: 1700
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- 被引次数: 0
出版历程
- 收稿日期: 2012-12-31
- 修回日期: 2013-08-01
- 刊出日期: 2014-07-20

A Method for Under-determined Blind Source Separation Based on New Mixture Model

CHEN Yong-Qiang^1,2,
WANG Hong-Xia¹

1.
School of Information Science and Technology, Southwest Jiaotong University, Chengdu 610031;
2.
Electronic Experiment Center, Chengdu University of Information Technology, Chengdu 610225

Funds:

Supported by National Natural Science Foundation of China (61170226), Fundamental Research Funds for the Central Universities (SWJTU11CX047, SWJTU12ZT02), and Young Innovative Research Team of Sichuan Province (2011JTD0007)

摘要

摘要: 针对欠定盲分离问题，提出了一种新的源恢复方法. 在时频域局部区域采用复高斯分布对源信号进行建模，将语音信号的稀疏性和局部平稳性结合在一起，提出了一种新的混合模型来描述观测信号在局部区域的概率分布.通过该模型，将每个时频点的源信号状态的判断问题转换成模型的参数估计和后验概率的计算问题，最后通过子混合矩阵的逆恢复出源信号. 实验结果表明，该方法具有很快的收敛速度，并且比已有方法具有更好的分离性能.
- 欠定盲分离 /
- 混合模型 /
- 稀疏性 /
- 局部复高斯分布 /
- 最大后验概率
Abstract: To solve the problem of under-determined blind source separation, we propose a new source recovery method. By utilizing the complex valued Gaussian model to characterize the local distribution of source signals in each micro-region in the time-frequency domain and combining speech signals' sparsity with their local stability, a new mixture model is derived to characterize the local distribution of observed signals. We convert the problem of judging the state of each source signal at each time-frequency point into a problem of model's parameters estimation and posterior probability computation. Finally, the source signals are recovered by sub-mixing matrix's inverse. Experiment results show that the proposed method converges very fast and has better separation performance compared with the existing methods.
- Under-determined blind source separation /
- mixture model /
- sparsity /
- local complex Gaussian distribution /
- maximum a posteriori

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参考文献(23)

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基于新型混合模型的欠定盲分离方法

doi: 10.3724/SP.J.1004.2014.01412

作者简介:
王宏霞西南交通大学信息科学与技术学院教授. 主要研究方向为多媒体信息安全，数字水印与取证，语音和音频信号处理. E-mail：hxwang@swjtu.edu.cn.

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A Method for Under-determined Blind Source Separation Based on New Mixture Model

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留言板

基于新型混合模型的欠定盲分离方法

doi: 10.3724/SP.J.1004.2014.01412

作者简介: 王宏霞 西南交通大学信息科学与技术学院教授. 主要研究方向为多媒体信息安全，数字水印与取证，语音和音频信号处理. E-mail：hxwang@swjtu.edu.cn.

计量

出版历程

A Method for Under-determined Blind Source Separation Based on New Mixture Model

计量

出版历程

目录

作者简介:
王宏霞西南交通大学信息科学与技术学院教授. 主要研究方向为多媒体信息安全，数字水印与取证，语音和音频信号处理. E-mail：hxwang@swjtu.edu.cn.