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Noise Robust Direction of Arrival Estimation for Speech Source With Weighted Bispectrum Spatial Correlation Matrix
Xue, Wei; Liu, Wenju; Liang, Shan
2015-08-01
发表期刊IEEE JOURNAL OF SELECTED TOPICS IN SIGNAL PROCESSING
卷号9期号:5页码:837-851
文章类型Article
摘要One big challenge to the robust direction of arrival (DOA) estimation for the speech source is the environmental noise. In practical conditions, the noise can be undirected or emitted from a pointed source. In order to improve the reliability of DOA estimation in various adverse noisy conditions, we propose a novel DOA estimation method in this paper, and what lies in the core in the method is the "Weighted Bispectrum Spatial Correlation Matrix (WBSCM)." The bispectrum is a kind of higher order statistics (HOS) of a signal, and the WBSCM reflects the spatial correlation of the bispectrum phase differences (BPD) between different microphones. As the HOS of the Gaussian signal is theoretically zero, by formulating in the bispectrum domain, the proposed method has an inherent advantage against the Gaussian noise. Moreover, the BPD, which is embedded in the WBSCM, contains the redundant information related to the DOA of the speech source. This redundancy helps to improve the robustness in non-Gaussian noise conditions, especially for the directional interference scenarios. In addition, the WBSCM enables bispectrum weighting to select the speech units in the bispectrum, in order to highlight the effect of these units in the DOA estimation. Similar to the signal-to-noise estimation, a decision-directed method is proposed to compute the bispectrum weights. Finally, a new DOA estimator is proposed, which is based on the eigenvalue analysis of the WBSCM. We conduct experiments under various kinds of noisy environments, and the experimental results demonstrate the effectiveness of proposed method.
关键词Direction Of Arrival (Doa) Estimation Microphone Array Signal Processing High Order Statistics Bispectrum
WOS标题词Science & Technology ; Technology
关键词[WOS]TIME-DELAY ESTIMATION ; HIGHER-ORDER SPECTRA ; SOURCE LOCALIZATION ; DOA ESTIMATION ; MICROPHONE ARRAYS ; CROSS-CORRELATION ; IDENTIFICATION ; ENHANCEMENT ; ENVIRONMENT ; STATISTICS
收录类别SCI
语种英语
WOS研究方向Engineering
WOS类目Engineering, Electrical & Electronic
WOS记录号WOS:000357932100008
引用统计
被引频次:1[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ia.ac.cn/handle/173211/8875
专题模式识别国家重点实验室_机器人视觉
作者单位Chinese Acad Sci, Inst Automat, Natl Lab Pattern Recognit, Beijing 100190, Peoples R China
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GB/T 7714
Xue, Wei,Liu, Wenju,Liang, Shan. Noise Robust Direction of Arrival Estimation for Speech Source With Weighted Bispectrum Spatial Correlation Matrix[J]. IEEE JOURNAL OF SELECTED TOPICS IN SIGNAL PROCESSING,2015,9(5):837-851.
APA Xue, Wei,Liu, Wenju,&Liang, Shan.(2015).Noise Robust Direction of Arrival Estimation for Speech Source With Weighted Bispectrum Spatial Correlation Matrix.IEEE JOURNAL OF SELECTED TOPICS IN SIGNAL PROCESSING,9(5),837-851.
MLA Xue, Wei,et al."Noise Robust Direction of Arrival Estimation for Speech Source With Weighted Bispectrum Spatial Correlation Matrix".IEEE JOURNAL OF SELECTED TOPICS IN SIGNAL PROCESSING 9.5(2015):837-851.
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