Higher-order time-varying allpass filters for signal decorrelation in stereophonic acoustic echo cancellation

1999 ◽  
Vol 35 (1) ◽  
pp. 88 ◽  
Author(s):  
N. Tangsangiumvisai ◽  
J.A. Chambers ◽  
A.G. Constantinides
Keyword(s):  
Higher Order ◽  
Echo Cancellation ◽  
Acoustic Echo Cancellation ◽  
Time Varying ◽  
Allpass Filters ◽  
Acoustic Echo

A Joint Optimized Robust Acoustic Echo Cancellation Algorithm

2019 ◽  
Vol 33 (09) ◽  
pp. 1959029 ◽  
Author(s):  
Hongyan Li ◽  
Jianghao Feng ◽  
Yue Wang ◽  
Xueying Zhang
Keyword(s):  
Impulse Noise ◽  
Regularization Parameter ◽  
Convergence Speed ◽  
Echo Cancellation ◽  
Acoustic Echo Cancellation ◽  
Time Varying ◽  
Mean Square ◽  
Least Mean Square ◽  
Acoustic Echo ◽  
Series Of Experiments

When the input signals for acoustic echo cancellation (AEC) are related signals, the convergence speed of the traditional normalized least mean square (NLMS) algorithms is significantly reduced. In this paper, a joint optimization robust AEC algorithm is proposed to solve this problem. Based on the analysis of the convergence of the normalized subband adaptive filtering (NSAF) algorithm, the algorithm is optimized by minimizing the mean square error (MSE) of the NSAF algorithm, combining sub-band time-varying step factor and time-varying regularization parameter to update the filter weight vectors. And when the impulse noise occurs, the sub-band cut-off parameter is updated in a recursive manner, which makes the algorithm achieve fast convergence speed and low steady-state error, and has strong robustness to impulse noise. In a series of experiments on AEC, simulation results show that the performance of the algorithm is better than the existing algorithms.

Sign in / Sign up

Export Citation Format

Share Document