Creating C-Series Matrix Crosspoints - Polycom SoundStructure C16 Design Manual

SoundStructure C-Series Recording Ungated–Conferencing Path
UNGATED - Conferencing Processing
Mic or Line Analog A/D Parametric
Input Converter Equalization
Gain
Parametric
Equalization
Processing Recording/Ungated–Sound Reinforcement
Finally, the sound reinforcement recording/ungated input includes the echo and noise cancellation and
optional feedback elimination processing, as shown in the following figure.
SoundStructure C-Series Recording Ungated–Sound Reinforcement Path
UNGATED - Sound Reinforcement Processing
Mic or Line A/D Parametric
Analog
Input Gain Converter Equalization
Parametric
Equalization
All versions of the recording/ungated input signal processing can be used simultaneously in the matrix. The
conferencing version is typically used to send to remote participants, the sound reinforcement version is
typically used to send to the local loudspeaker system, and the recording version is typically used for
archiving the conference audio content.

Creating C-Series Matrix Crosspoints

The audio matrix is used to create different mixes of input signals and submix signals are sent to output
signals and submix signals. Matrix crosspoints gain values are shown in dB where 0 dB means a signal
value is unchanged. For example, a crosspoint value of -6 dB lowers the signal gain by 6 dB before it is
summed with other signals. You can adjust the matrix crosspoint gain in 0.1 dB steps between -100 and +20
dB, and you can also completely mute the matrix crosspoint. In addition, you can also negate and invert the
matrix crosspoint so that the crosspoint arithmetic creates a subtraction rather than an addition. The
inversion technique is effective in difficult room reinforcement environments by creating phase differences
in alternating zones to add more gain before feedback.
Polycom, Inc.
Non Linear
Acoustic Echo Noise
Processing
Cancellation Cancellation
Feedback
Cancellation
Non Linear
Acoustic Echo Noise
Processing
Cancellation Cancellation
Non Linear
Acoustic Echo Noise
Processing
Cancellation Cancellation
Feedback
Cancellation
Feedback
Acoustic Echo Noise
Cancellation Cancellation Cancellation
AGC Dynamics
Automatic Dynamics
Gain Control Processor
Automixer
Automatic Dynamics
Automixer
Gain Control Processor
Automatic Dynamics
Automixer
Gain Control Processor
Dynamics
Automatic
Processor
Gain Control
AGC Dynamics
Automatic Dynamics
Gain Control Processor
Automixer
Automatic Dynamics
Automixer
Gain Control Processor
Automatic Dynamics
Automixer
Gain Control Processor
Dynamics
Automatic
Gain Control Processor
Fader Delay Mute
Input to
Fader Delay
Matrix
Input to
Fader Delay
Matrix
Input to
Fader Delay
Matrix
Fader Delay Mute
Fader Delay Mute
Input to
Fader Delay
Matrix
Input to
Fader Delay
Matrix
Input to
Fader Delay
Matrix
Fader Delay Mute
Recording/
Ungated
Conferencing
Sound
Reinforcement
Recording/
Ungated
Conferencing
Sound
Reinforcement
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