Method and apparatus for echo suppression by the use of the power output estimation of the residual signal

摘要

An echo canceller determines a dynamic threshold (TH(n)) that depends on a non-linear error power estimate (24), and preferably also a linear error power estimate (22). A residual power estimate (28) of a residual signal (e(n)) is compared to this dynamic threshold. The residual signal is attenuated in a non-linear processor (20) if the residual power estimate falls below the dynamic threshold.