|
|||||
|
|
| 基于自适应和相关检测的两级时延估计算法 | |
| 引用本文： | 郑勇,俞冬英,李曦.基于自适应和相关检测的两级时延估计算法[J].软件,2011,32(8):6-8,20. |
| 作者姓名： | 郑勇 俞冬英 李曦 |
| 作者单位： | 1. 京宏科技(苏州)有限公司,江苏苏州,215021 2. 东南大学软件工程学院,江苏苏州,215021 3. 中国科学技术大学计算机科学与技术学院,合肥,230027 |
| 摘 要： | 简要本文提出了一种新的两级时延估计方法，采用自适应时延估计与相关检测相结合，在最小均方误差准则下（LMS）通过对FIR滤波器参数的迭代，峰值检测得到时延的整数值，再通过相关检测得到时延估计的小数值。通过对算法原理的推导，给出了时延估计的整数值和小数值的理论依据，并给出了算法具体实现过程。实验结果和分析表明，在非平稳噪音和信噪比大干6dB情况下，时延估计的准确度可以达到95％以上，运算复杂度显著降低。 |
| 关 键 词： | 语音处理 最小均方误差 时延估计 相关检测 |
A New Two-stage Time-delay Estimation Algorithm based on LMS Adaption and Correlation Detection |
|
| ZHENG Yong,YU Dongying,LI Xi.A New Two-stage Time-delay Estimation Algorithm based on LMS Adaption and Correlation Detection[J].Software,2011,32(8):6-8,20. | |
| Authors: | ZHENG Yong YU Dongying LI Xi |
| Affiliation: | ZHENG Yong1,YU Dongying2,LI Xi3(1.Modiotek(Suzhou) Co.,Ltd,Suzhou,Jiangsu 215021,China,2.College of Software,Southeast University,3.Institute of Computer Science and Technology,University of Science and Technology of China,Hefei,230027,China) |
| Abstract: | A new robust time-delay estimation method is proposed.Based on the combination of adaptive time-delay estimation and correlation detection,it has two stages,the first is to get integer delay value by using the LMS adaptive iteration,the second is to use correlation detection to get fractional delay.The algorithm's implementation flowchart is given.The test results show,under non-stationary noise and when snr is above 6dB,the accuracy of time-delay estimation is up to 95%,and the computation complexity is re... |
| Keywords: | Speech Processing MMSE Time-delay Estimation Correlation Detection |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |
