Polycom SoundStructure C16 Design Manual page 35

SoundStructure SR-Series Signal Input Processing Path
Feedback Eliminator: 10 adaptive filters
Noise cancellation: 0-20dB noise reduction
Automixer: gain sharing or gated mixer
Signal fader gain: +20 to -100 dB
Signal delay: up to 1000 msec
The processing for each input is shown in the following figure from analog input signal to the three versions
of input processing that lead to the matrix.
SoundStructure SR-Series Input Processing
Mic or Line Analog A/D Parametric
Input Converter Equalization
Gain
Each analog input signal has an analog gain stage that is used to adjust the gain of the input signal to the
SoundStructure's nominal signal level of 0 dBu. The analog gain stage can provide from -20 to 64 dB of
Polycom, Inc.
Input
1
Processing
Input
2
Processing
Input
N
Processing
Noise
Cancellation
Feedback
Cancellation
Telco
Telco
Telco
Processing
Telco
Processing
Processing
Processing
Output
1
Processing
Output
2
Processing
Matrix
Output
N
Processing
Submix SubMix
Processing
Processsing
AGC Dynamics
Automatic Dynamics
Gain Control Processor
Automixer
Automatic Dynamics
Automixer
Gain Control Processor
Automatic Dynamics
Automixer
Gain Control Processor
Fader Delay Mute
Fader Delay
Fader Delay
Fader Delay
Input to
Recording/
Matrix
Ungated
Input to
Noise Cancelled
Matrix
Sound
Input to
Matrix Reinforcement
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