[1]万新旺,吴镇扬.基于自适应频率选择的鲁棒时延估计算法[J].东南大学学报(自然科学版),2010,40(5):890-894.[doi:10.3969/j.issn.1001-0505.2010.05.002]
　Wan Xinwang,Wu Zhenyang.Robust time delay estimation algorithm based on adaptive frequency selection[J].Journal of Southeast University (Natural Science Edition),2010,40(5):890-894.[doi:10.3969/j.issn.1001-0505.2010.05.002]
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基于自适应频率选择的鲁棒时延估计算法()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
40
期数:
2010年第5期
页码:
890-894
栏目:
信息与通信工程
出版日期:
2010-09-20

文章信息/Info

Title:
Robust time delay estimation algorithm based on adaptive frequency selection
作者:
万新旺;  吴镇扬
东南大学信息科学与工程学院,南京 210096
Author(s):
Wan Xinwang;  Wu Zhenyang
School of Information Science and Engineering, Southeast University, Nanjing 210096, China
关键词:
麦克风阵列;  时延估计;  GCC-PHAT算法;  自适应频率选择
Keywords:
microphone array;  time delay estimation;  GCC-PHAT(generalized cross correlation approach with phase transform weighting);  adaptive frequency selection
分类号:
TN912.3
DOI:
10.3969/j.issn.1001-0505.2010.05.002
摘要:
为了增强相位变换加权广义互相关方法(GCC-PHAT)这一常用时延估计方法对噪声的鲁棒性,提出了一种基于频率自适应选择的改进算法.该算法利用较短的语音数据(32ms)估计出每个频率的协方差矩阵,从而计算出每个频率的信噪比(SNR),然后自适应地选择SNR较大的频率用于时延估计.仿真实验结果表明,不论是在中等混响(混响时间T60=0.3s)还是在强混响(T60=0.6s)条件下,相对于GCC-PHAT方法,该算法对噪声的鲁棒性更强.
Abstract:
The generalized cross correlation approach with phase transform weighting(GCC-PHAT)is a popular time delay estimation(TDE)algorithm. To enhance the robustness of the GCC-PHAT against noise, an improved TDE algorithm based on adaptive frequency selection is proposed. The signal-to-noise ratio(SNR)of each frequency is calculated from the covariance matrix estimated from the short segments(32ms)of speech, and then the frequencies with high SNR are adaptively selected to estimate the time delay. Simulation results show that the proposed method is more robust against noise compared to the traditional GCC-PHAT method under both medium(reverberation time T60=0.3s)and high reverberation(T60=0.6s)conditions.

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备注/Memo

备注/Memo:
作者简介: 万新旺(1972—),男,博士生; 吴镇扬(联系人),男,教授,博士生导师,zhenyang@seu.edu.cn.
基金项目: 国家自然科学基金资助项目(60971098).
引文格式: 万新旺,吴镇扬.基于自适应频率选择的鲁棒时延估计算法[J].东南大学学报:自然科学版,2010,40(5):890-894. [doi:10.3969/j.issn.1001-0505.2010.05.002]
更新日期/Last Update: 2010-09-20