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| 数字助听器的并行梯度投影回声抵消 | |
| 引用本文： | 梁瑞宇,赵力,王青云,奚吉,张学武.数字助听器的并行梯度投影回声抵消[J].应用科学学报,2012,30(3):256-262. |
| 作者姓名： | 梁瑞宇 赵力 王青云 奚吉 张学武 |
| 作者单位： | 1. 河海大学计算机与信息学院,南京210098;东南大学信息科学与工程学院,南京210096 2. 东南大学信息科学与工程学院,南京,210096 3. 南京工程学院通信工程学院,南京,211167 4. 河海大学计算机与信息学院,南京,210098 |
| 基金项目： | 国家自然科学基金，江苏省自然科学基金，中央高校基本科研业务费专项资金 |
| 摘 要： | 自适应回声抵消是消除助听器回声啸叫的有效方法.针对回声路径评估偏差大的问题,文中提出线性预测-并行梯度投影算法,通过对助听器输出信号进行线性预测来生成解相关FIR滤波器,获得解相关信号.系统利用解相关信号构建包含回声路径的凸优化方程,并设计并行梯度投影算法求解该方程,实现回声路径的估计.实验结果表明算法在收敛速度、稳定性和精度等方面改进显著. |
| 关 键 词： | 回声抵消 解相关 线性预测 并行梯度投影 助听器 |
Acoustic Feedback Cancellation Based on Parallel Gradient Projection in Hearing Aids |
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| LIANG Rui-yu , ZHAO Li , WANG Qing-yun , XI Ji , ZHANG Xue-wu.Acoustic Feedback Cancellation Based on Parallel Gradient Projection in Hearing Aids[J].Journal of Applied Sciences,2012,30(3):256-262. | |
| Authors: | LIANG Rui-yu ZHAO Li WANG Qing-yun XI Ji ZHANG Xue-wu |
| Institution: | 1.College of Computer and Information,Hohai University,Nanjing 210098,China 2.Nanjing Institute of Technology,School of Communication Engineering,Nanjing 211167,China 3.School of Information Science and Engineering,Southeast University,Nanjing 210096,China |
| Abstract: | Adaptive feedback cancellation is an effective way to suppress echo howling in hearing aids.However, when the external input signal is correlated with the receiver input signal,the estimate of the feedback path contains a large error.This paper proposes a linear prediction-parallel gradient projection algorithm, which generates a FIR filter to obtain the decorrelation signal by linear prediction of the output signals.The decorrelation signal is then used to build a convex optimization equation.With the parallel gradient projection algorithm,the equation is solved to evaluate the echo path.Simulation results show clear improvement in convergence,stability and precision. |
| Keywords: | acoustic feedback cancellation decorrelation linear prediction parallel gradient projection hearing aid |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |