Customizing SoundStructure Designs
5 - 35
Noise cancellation can be enabled for a non microphone channel, such as a
video codec audio or program audio, by selecting the conferencing version of
the ungated signal path (note that the default selection for non-microphone
audio sources is the line-input processing path). The ungated conferencing
signal path is shown in the following figure. Notice that the noise cancellation
processing is now in the signal path along with the automatic gain control,
dynamics processing, fader, delay, and mute. The acoustic echo canceller is
also in this signal path but should not be enabled for non-microphone audio
sources.
Mic or Line
Input
Input to
Matrix
Input to
Matrix
Parametric
Equalization
A/D
Converter
Analog
Gain
Acoustic Echo
Cancellation
Noise
Cancellation
Automatic
Gain Control
Automixer
AGC Dynamics Fader Delay
Fader
Automixer
Automixer
Delay
Automatic
Gain Control
Non Linear
Processing
Feedback
Cancellation
Dynamics
Processor
Dynamics
Processor
Fader
Input to
Matrix
Automatic
Gain Control
Fader Delay
Dynamics
Processor
Delay
Mute
Recording/
Ungated
Conferencing
Sound
Reinforcement
UNGATED - Conferencing Processing
Parametric
Equalization
Acoustic Echo
Cancellation
Noise
Cancellation
Automatic
Gain Control
Fader Delay
Non Linear
Processing
Dynamics
Processor
Mute