|本期目录/Table of Contents|

[1]张雷岳,张兴敢*,刘 超.麦克风阵列声源定位中时延估计的改进[J].南京大学学报(自然科学),2015,51(1):25-30.[doi:10.13232/j.cnki.j nju.2015.01.005]
 Zhang Leiyue,Zhang Xinggan,Liu Chao.The improvement of time delay estimation in the microphone array sound localization system[J].Journal of Nanjing University(Natural Sciences),2015,51(1):25-30.[doi:10.13232/j.cnki.j nju.2015.01.005]
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麦克风阵列声源定位中时延估计的改进()
     

《南京大学学报(自然科学)》[ISSN:0469-5097/CN:32-1169/N]

卷:
51
期数:
2015年第1期
页码:
25-30
栏目:
出版日期:
2015-01-30

文章信息/Info

Title:
The improvement of time delay estimation in the microphone array sound localization system
作者:
张雷岳张兴敢*刘 超
(南京大学电子科学与工程学院,南京,210023)
Author(s):
Zhang Leiyue Zhang Xinggan Liu Chao
(School of Electronics Science and Engineering,Nanjing University,Nanjing,210023,China)
关键词:
时延估计混响时间声源定位广义互相关
Keywords:
Time-delay estimation Reverberation time The sound source localization Generalized cross-correlation
分类号:
-
DOI:
10.13232/j.cnki.j nju.2015.01.005
文献标志码:
-
摘要:
时延估计是阵列信号处理中的关键技术,是麦克风阵列声源定位系统中常用的方法。影响麦克风阵列声源定位性能的因素有很多,混响就是其中之一。通常麦克风阵列定位系统多处于室内环境中,除了其他干扰噪声和环境噪声的影响外,声源本身经过环境反射造成的混响也会对其性能造成较大的影响。本文在互相关原理的基础上,综合两种不同的频域加权算法,PATH加权和ML加权进行改进,弥补了原算法不能同时稳健噪声和混响的不足,并得到多种环境下的最优q值,降低了多径效应对估计阵元间的相对时间延迟的影响,提高了时延估计的准确率和声源定位精度。实验结果证实了新方法的时延估计准确率高和最优q值的有效性。 

Abstract:
Time-delay estimation algorithm is one of the key technologies in array signal processing, used in the microphone array sound localization system. Many researvhes have been focused on the time-delayestimation in recent years. Time-delay estimation algorithm is roughly divided into two steps to orientate the sound source , to deal with the microphone receives the signal, estimate the relative time delay in the microphone array,then, according to the spatial geometric relationships of microphone array in each, combined the relative time delay with the first step to get the location of the source in the reference field.There are many factors that can influence the properties of the microphone array sound localization system, reverberation is one of them. Usually a microphone array sound positioning system is in the indoor environment, in addition to the influence of other interfering noise and environmental noise, the sound source itself through the environment reflection caused by reverberation will cause great influence to its performance. The size of the indoor environment and the location of sound source can also lead to different reverberation. In this paper, based on the principle of cross-correlation, comprehensive two kinds of different frequency weighted algorithm, the PATH and the ML . The new algorithm can also robust noise and reverberation, and get the optimal q value at the variety of environments, reducing the influence of the multipath effect arrays to estimate the relative time delay, improves the accuracy of time delay estimation and sound source localization accuracy. The experimental results also proved the new method of time delay estimation accuracy, the effectiveness of the optimal q value. 


参考文献/References:

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备注/Memo

备注/Memo:
江苏省产学研前瞻性联合研究项目(BY2012187)
更新日期/Last Update: 2015-01-04