混响和噪声环境下基于角度谱的多声源定位与计数算法  

Multiple sound source localization and counting algorithm based on angular spectrum under noisy and reverberant environment

作　　者：房玉琢[1] 许志勇[1] 赵兆[1] FANG Yuzhuo;XU Zhiyong;ZHAO Zhao(School of Electronic and Optical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China)

机构地区：[1]南京理工大学电子工程与光电技术学院,江苏南京210094

出　　处：《国防科技大学学报》2018年第3期113-119,共7页Journal of National University of Defense Technology

基　　金：国家自然科学基金资助项目(61171167;61401203)

摘　　要：针对混响及噪声环境下的多声源定位与计数问题,引入局部信噪比追踪及相关性检测模块,提取出传统广义互相关角度谱中受噪声及声源互扰影响较小的时频支撑域;同时引入双宽度匹配追踪方法替代传统的峰值搜索,改进后续定位与计数的精确度。仿真研究验证了综合应用滤波后的角度谱及双宽度匹配追踪的多声源定位与计数算法相比传统算法在较低信噪比、较强混响以及较多声源数的环境中更加精确及稳健。For multiple sound source localization and counting under noisy and reverberant environment,two modules,local signal-to-noise ratio tracking and coherence test, were introduced to extract the time-frequency bins less afected by noise and mutual interference of the sound sources in classical generalized cross-correlation angular spectrum;then the traditional peak search method was replaced by the dual-width matching pursuit to improve the following localization and counting accuracy. Through the simulation results , the proposed alocalization and counting using both the filtered angular spectrum and dualvidth matching pursuit method is proved to bthan the traditional one , especially under the environment with lower signal-to-noise ratio , stronger reveberation and more sound source.

关 键 词：麦克风阵列 角度谱 时频域滤波 匹配追踪 定位与计数 

分 类 号：TN911.72[电子电信—通信与信息系统]