一种新的回音消除的双向通话检测算法

在回音消除的算法中，近端语音信号的出现会引起预测回声路径的自适应滤波器发散，一个很成熟的回声消除算法一定包含双向通话检测算法。提出了一种基于滤波器抽头活跃位置的双向通话检测算法，该算法利用滤波器最活跃的抽头位置相邻的n个抽头2．范数作为一个检测参数，并且区分滤波器间差异性的参数的阈值是动态的，该算法对双向通话的出现与消失能做出快速的响应，实现简单，检测准确。文章的双向通话检测新算法是基于双辅助滤波器的回音消除器的结构，通过录制了真实的环境语音仿真验证了该算法的鲁棒性。

A novel double talk detection of acoustic echo cancellation algorithm

In acoustic echo cancellation algorithm, the presence of near-end speech causes divergence of the adaptive filter which is used to model the echo path. A robust acoustic echo canceller must be equipped with a double talk algorithm. This paper proposes a double talk detection method based on the active filter＇s tap position, which utilizes continuous n tap＇s coefficient 2-norm as detection parameter after the most active filter＇s tap position and the decision threshold is dynamic. This method can quickly react to onset and cessation of double talk detection, and it is easy to implement and detect precisely. The canceller of the proposed DTD algorithm is based on dual auxiliary structure, which is verified and simulated by recorded speech under the real environment.