Polycom SoundStructure C16 Design Manual page 38

coupled to the microphone. This is the default processing for microphone inputs when the automixed
version of the signal is selected.
SoundStructure SR-Series Noise Cancellation Processing
SR-Series Noise Cancellation Input Processing
Mic or Line Analog A/D Parametric
Converter
Input Gain Equalization
Parametric
Equalization
Processing Sound Reinforcement
The sound reinforcement version is processed with the parametric equalization, noise cancellation, optional
feedback elimination processing, automatic gain control, dynamics processing, automixer, fader, delay, and
input mute. This is the path that is typically used for sending local audio to loudspeakers in the room for
sound reinforcement.
The automatic gain control on the sound reinforcement path is different from the automatic gain control on
the noise canceled version of the signal in that the sound reinforcement automatic gain control does not add
gain to the signal. In other words, the sound reinforcement AGC only reduces the gain of the signal and
does not add gain to the signal. This restriction on the sound reinforcement AGC prevents the automatic
gain control from reducing the available potential acoustic gain before the onset of feedback.
SoundStructure SR-Series Sound Reinforcement Input Processing
Mic or Line A/D Parametric
Analog
Input Converter Equalization
Gain
Parametric
Equalization
Processing Recording/Ungated Version
The recording version of the processed input signal is specifically designed to not include any gain sharing
or gated-style of automatic microphone mixing processing. The recording/ungated version of the input is
used for recording applications or in any application where an un-automixed version of the input signal is
required.
For additional flexibility in audio applications, there are four different versions of the recording/ungated
signal that can be selected through the four-input router shown in the previous processing figures. This
Polycom, Inc.
Noise
Cancellation
Feedback
Cancellation
Noise Automatic
Cancellation Gain Control
Noise
Cancellation
Feedback
Cancellation
Noise Feedback Automatic
Cancellation Cancellation Gain Control
AGC Dynamics Fader
Automatic Dynamics
Fader
Gain Control Processor
Automixer
Automatic Dynamics
Automixer Fader
Processor
Gain Control
Automatic Dynamics
Automixer Fader
Gain Control Processor
Dynamics
Automixer
Processor
AGC Dynamics
Automatic Dynamics
Gain Control Processor
Automixer
Automatic Dynamics
Automixer
Gain Control Processor
Automatic Dynamics
Automixer
Gain Control Processor
Dynamics
Automixer
Processor
Delay Mute
Input to
Delay
Matrix
Input to
Delay
Matrix
Input to
Delay
Matrix
Fader Delay Mute
Fader Delay Mute
Input to
Fader Delay
Input to
Fader Delay
Input to
Fader Delay
Fader Delay Mute
Recording/
Ungated
Noise Cancelled
Sound
Reinforcement
Recording/
Matrix
Ungated
Noise Cancelled
Matrix
Sound
Matrix
Reinforcement
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