| 动态分段的飞机舱音记录器混合信号在线盲分离性能分析 |
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| 引用本文： | 杨琳,王从庆,张红占.动态分段的飞机舱音记录器混合信号在线盲分离性能分析[J].应用科学学报,2010,28(2). |
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| 作者姓名： | 杨琳 王从庆 张红占 |
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| 作者单位： | 1. 南京航空航天大学,民航学院,南京,210016;中国民用航空总局,航空安全技术中心,北京,100028
2. 南京航空航天大学,自动化学院,南京,210016 |
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| 摘 要： | 针对飞机驾驶舱话音记录器(CVR)中存在轻微时变特性和信号有大量近零值的情况,提出一种基于信号样本动态分段的在线盲分离算法.应用独立分量分析的在线算法对CVR混合信号进行动态分段处理,再通过快速的FastICA算法进行精确化求解.为了使估计器获得最佳性能,适当调整分离矩阵各行权值.仿真结果表明,该算法可有效地将CVR混合信号中独立的声音信号分离出来,分离效果优良.
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| 关 键 词： | 驾驶舱话音记录器 混合声音信号 在线盲分离算法 动态分段 |
Performance of Online Blind Separation of Dynamically Segmented Mixed Acoustic Signal for CVR |
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| YANG Lin,WANG Cong-qing,ZHANG Hong-zhan.Performance of Online Blind Separation of Dynamically Segmented Mixed Acoustic Signal for CVR[J].Journal of Applied Sciences,2010,28(2). |
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| Authors: | YANG Lin WANG Cong-qing ZHANG Hong-zhan |
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| Institution: | YANG Lin~(1,2),WANG Cong-qing~3,ZHANG Hong-zhan~3 1.Civil Aviation College,Nanjing University of Aeronautics , Astronautics,Nanjing 210016,China 2.Civil Aviation Safety Technical Center of CAAC,Beijing 100028,China 3.College of Automation Engineering,China |
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| Abstract: | Considering the existence of slight time-varying characteristics and a large number of near-zero signal values,we propose an online blind separation algorithm based on signal sample dynamic segmentation. The online algorithm of independent component analysis(ICA) is used to achieve dynamic segmentation. The FastICA algorithm is executed until converging to an optimal solution.To obtain better performance, weights of the rows in the separation matrix are adjusted.Simulation results show excellent performance... |
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| Keywords: | cockpit voice recorder(CVR) mixed acoustic signal on-line blind separation algorithm dynamic segmentation |
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