System Configuration ~ Inputs and Outputs | 35 |
Non-linear Processing (NLP)
The
Meters
The Echo Return Loss (ERL) meter on the Acoustic Echo Canceller window shows the coupling between the reference signal and the input to the echo
The Echo Return Loss Enhancement (ERLE) meter shows the loss through the echo cancellation and
The Total Echo Reduction meter shows the total ERL and ERLE reduction, in decibels. It is an average meter that updates only when a signal is present.
NC
The NC button on the selected input in the Inputs
To use noise cancellation, click Enable Noise Canceller, then adjust the Cancellation Depth to the setting which provides the best combination of low noise and maximum speech clarity. The attenuation depth can be set in 1dB increments from 6dB to 15dB. Default is 6dB.
Figure 3.32. Noise Canceller window
The noise canceller default is Off. When noise cancellation is enabled, the light on the NC button illuminates green.
Filters
The Filter button on the selected input in the Inputs
Active Filter
Active Filter selects among filters on the graph. Note that no filters exist until you click Add Filter (see Figure 3.33) to add filters to the graph.
