What is one of the main considerations when choosing the nlp mode?

1. What is the purpose of the non linear processing NLP algorithm that comes after the AEC processing?
2. What is the purpose of the AEC reference block?
3. Which of the following ERl values would be considered a desirable level in terms of echo being removed from a system?

What is the purpose of the non linear processing NLP algorithm that comes after the AEC processing?

Non-Linear Processing (NLP) eliminates any residual loudspeaker audio present in the microphone signal after the microphone audio has been processed by the AEC Adaptive Filter.

What is the purpose of the AEC reference block?

Each Acoustic Echo Cancellation (AEC) block has an associated AEC Reference block. The purpose of AEC is to process the microphone audio so that audio coming from the loudspeaker is removed from the microphone signal. To do this, the AEC needs to know what audio signal is being sent to the loudspeakers.

Which of the following ERl values would be considered a desirable level in terms of echo being removed from a system?

A value between 0 and +15 is optimal. ERLE (Echo Return Loss Enhancement) shows the amount of echo reduction the AEC adaptive filter is doing.