数据采集与处理2009，Vol.24Issue(6)：703-708,6.
基于声源时延估计的欠定盲分离方法
Underdetermined Blind Separation Based on Sound Source Time-Delay Estimation
摘要
Abstract
Based on time-delay estimation, a time-frequency masking method is proposed for underdetermined blind source separation. The method can realize the blind separation more than 3 source signals by using only 3 received array elements. Firstly, relative time-delay sequences of all sources are estimated in time-frequency domain by virtue of the W-disjoint orthogonality of speech signals. Secondly, based on the estimated time-delay sequences, the maximum likelihood method is used to estimate the support domain of each signal. The time-frequency components in each support domain belong to only one signal approximatively, and different support domains are mutually disjoint. Finally, the time-frequency representation of each signal is obtained by the time-frequency masking, and then the time-domain source signals are retrieved. The experiments illustrate that the method is validated by the informal subjective measure, and the gain of segment signal-to-noise ratio is at least 13dB. Compared with the degenerate unmixing estimation technique, the separation performance of the proposed method improves about 3dB measured by signal dissimilarities.关键词
欠定盲分离/时延估计/W-分离正交性/最大似然/时频掩蔽Key words
underdetermined blind separation/ time-delay estimation/ W-disjoint orthogonality/ maximum likelihood/ time-frequency masking分类
信息技术与安全科学引用本文复制引用
张华,冯大政,庞继勇..基于声源时延估计的欠定盲分离方法[J].数据采集与处理,2009,24(6):703-708,6.基金项目
国家自然科学基金(60672128,60702057)资助项目 （60672128,60702057）
国家高技术研究发展计划"八六三"计划(2007AA01Z288)资助项目. （2007AA01Z288）
