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.