Using Delay Compensation - Polycom SoundStructure C16 Design Manual

The signal processing associated with the low delay option is shown in the following figure for both the
ungated sound reinforcement path and automixed sound reinforcement paths.
Signal Processing for the Low Delay for Ungated and Automixed Sound Reinforcement Paths
UNGATED - Sound Reinforcement Processing
Mic or Line Analog A/D Parametric
Input Gain Converter Equalization
Parametric
Equalization
C-Series Sound Reinforcement Input Processing
Mic or Line Analog A/D Parametric
Input Gain Converter Equalization
Parametric
Equalization

Using Delay Compensation

The delay compensation control adds a fixed delay to the line input and bypass signal processing paths to
keep the different version of the input processing time aligned through the input processing.
Microphone inputs have approximately 16 msec of latency due to the AEC and noise cancellation
processing. By selecting delay compensation, 16 msec of delay is added to the line input and bypass
ungated signal types.
Polycom, Inc.
Non Linear
Acoustic Echo Noise
Processing
Cancellation Cancellation
Feedback
Cancellation
Router
Feedback
Cancellation
Non Linear
Acoustic Echo Noise
Processing
Cancellation Cancellation
Feedback
Cancellation
Router Router
Feedback
Cancellation
AGC Dynamics
Automatic Dynamics
Gain Control Processor
Router
Automixer
Automatic Dynamics
Automixer
Gain Control Processor
Automatic Dynamics
Automixer
Gain Control Processor
Automatic Dynamics
Gain Control Processor
AGC Dynamics
Automatic Dynamics
Gain Control Processor
Router
Automixer
Automatic Dynamics
Automixer
Gain Control Processor
Automatic Dynamics
Automixer
Gain Control Processor
Automatic Dynamics
Automixer
Processor
Gain Control
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
106