Non-linear adaptive echo supression algorithms: A technical survey

Voice communication today has become an indispensable part of human lives. Long distance communication is as crucial as face to face conversation. Hence, the issue of speech quality needs to be addressed with utmost priority. In this paper, the importance of voice communication over long distance is discussed. Then the analysis proceeds with the thorough study of an acoustic environment with the presence of acoustic echo in the scenario. Subsequently, the nonlinear acoustic echo is studied along with the difficulties that need to be tackled with to ensure its effective cancellation without causing harm to the significant voice data that need to be transmitted. Finally, various methods to find the non-linearity are presented with the thorough comparison of the existing nonlinear acoustic echo cancellation algorithms.