User Manual
Table Of Contents
- Introduction
- Audio Components
- The Difference Between Mono, Stereo, and Multi
- How to Control Control Signals
- Acoustic Echo Canceller (AEC)
- Ambient Noise Compensator (ANC)
- Audio Detector
- Auto Gain Control (AGC)
- Combiner
- Room Combiner/Room Combiner plus Automixer
- ■ “Room Combiner” component editor/”Room Combiner plus Automixer” component editor
- ■ “Room Combiner” component editor/”Room Combiner plus Automixer” component editor
- Combiner parameter setting window (Room Combiner)
- Combiner parameter setting window (Room Combiner plus Automixer)
- Control
- Control
- Dugan Automixer window (Room Combiner plus Automixer)
- Room Combiner/Room Combiner plus Automixer
- DCA
- Delay
- Dynamics
- REV-X
- EQ
- Fader
- Feedback Suppressor
- Filter
- Input/Output
- Meter
- Mixer
- Oscillator
- Polarity
- Probe
- Router
- Source Selector
- Speaker Processor
- Control Components
- Control Methods for Control Components
- Trigger
- Button (Normalized Value)
- Button (Value)
- Radio Button (Normalized Value)
- Radio Button (Value)
- Fader (Normalized Value)
- Fader (Value)
- Processing
- Logic (Normalized Value)
- NOT (Normalized Value)
- Flip-Flop (Normalized Value)
- Invert (Normalized Value)
- Compare (Normalized Value)
- Difference (Normalized Value)
- Max/Min (Normalized Value)
- Negate (Value)
- Compare (Value)
- Multi Compare (Value)
- Difference (Value)
- Max/Min (Value)
- Delay
- External Events
- Suspend
- Router
- Other
- GPI In
- GPI Out
ProVisionaire Design DME7 Component Guide
8
Acoustic Echo Canceller (AEC)
Acoustic Echo Canceller (AEC) is a function that eliminates the acoustic echo that can be a
problem during remote conferencing when sound from a speaker is picked up by
microphones, or steady-state noise such as produced by air conditioning systems. By
providing the other party with clear audio from which such echo and noise have been
removed, conversation during the remote conference can be conducted smoothly.
In order to eliminate acoustic echo that originates with the other party, the other party must
also be equipped with a system that provides an acoustic echo canceller function.
The following amount of delay is added to a signal path in which the AEC component is
placed.
When word clock is 44.1 kHz: 17.41 msec
When word clock is 48 kHz: 16.0 msec
When word clock is 88.2 kHz: 17.41 msec
When word clock is 96 kHz: 16.0 msec
Audio
Here we explain using an image of 2-channel input.
The AEC inputs are as follows, starting from the top.
• MicIn 1 : Input from mic
• MicIn 2 : Input from mic
• Reference : Input for the signal that you do not want transmitted to the remote location
(signal that is considered as echo, and is to be removed) (e.g., Codec In)
Use mics from the same conference room as the input to MicIn 1 and MicIn 16.