Acoustic Echo Cancellation by Combining Adaptive Digital Filter and Recurrent Neural Network

Understand

Acoustic Echo Cancellation (AEC) plays a key role in voice interaction.

• Due to the explicit mathematical principle and intelligent nature to accommodate conditions, adaptive filters with different types of implementations are always used for AEC, giving considerable performance.
• However, there would be some kinds of residual echo in the results, including linear residue introduced by mismatching between estimation and the reality and non-linear residue mostly caused by non-linear components on the audio devices.
• The linear residue can be reduced with elaborate structure and methods, leaving the non-linear residue intractable for suppression.