Extron electronics DMP 128 FlexPlus User Manual page 38

Cancel Button — Reverts any changes made to the contained parameters back to
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their states when the current instance of the
dialog box.
Show/Hide Advanced Options Button — Shows or hides the advanced
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configuration options for the AEC processor
AEC Help Button — Opens the
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DSP Configurator Help file for further assistance in operating AEC processor.
AEC Advanced Options
The dialog box provides advanced NLP (non-linear processing) options for fine tuning
AEC
echo cancellation. These options are hidden by default. Click the
button to access them (see
Options
Figure 48. AEC Advanced Options
Enable NLP Checkbox — Checked by default, NLP (non-linear processing) is required
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to completely remove echo.
NLP Presets — Offers three preset options for NLP parameters.
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• Soft — Applies soft preset values to the NLP reduction parameters for light echo
cancellation.
Normal (default) — Applies normal preset values to the NLP reduction parameters
•
for the widest array of echo cancellation needs.
Aggressive — Applies aggressive preset values to the NLP reduction parameters
•
for aggressive echo cancellation.
NLP Reduction Parameters — Provides text boxes for
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, and
Time Release Time
Double Talk Echo Reduction — Provides a text box to enter a reduction value (in dB)
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when double talk occurs. Double talk is when near end talkers and far end talkers are
speaking simultaneously while AEC is engaged.
Comfort Noise Text Box — Provides an ambient noise signal to prevent states of
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complete silence that may be perceived as a failed or dropped connection. 0 dB is the
default.
dialog box was opened and closes the
AEC
(AEC Advanced Options
Acoustic Echo Cancellation
figure 47, on the previous page).
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Enable NLP Checkbox
1
NLP Presets
2
NLP Reduction Parameters
3
Double Talk Echo Reduction
4
Comfort Noise
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to customize NLP reduction parameters.
DMP 128 FlexPlus • DSP Configurator Software
below).
topic of the
Show/Hide Advanced
,
Max NLP Reduction Attack
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