Optimal non-linear processor control for residual-echo suppression

The main goal of this paper is to establish an objective measure of non-linear processor (NLP) control quality for echo suppression after echo cancellation, as a basis for an optimal design of NLP control. As tools for reaching the goal, mathematical modeling and analysis of echo cancellation and suppression are used. Since the optimality assumes knowledge of the parameters of the echo cancellation process, the effects of the uncertain parameters on the objective measure of NLP control quality are studied. The performance of NLP control is investigated under ideal and non-ideal circumstances.