Theory Of Operation; Mediaport 200 Audio Modes - Extron electronics MediaPort 200 User Manual

Theory of Operation

This section contains a discussion on how the MediaPort 200 can be implemented,
including its two operational modes. Additionally, this section covers the signal flow within
the MediaPort 200 in these two modes. The following topics are discussed:
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MediaPort 200 Audio Modes

The MediaPort works in conjunction with a computer "soft-conferencing" application to
create a hands-free conferencing environment, and is recognized by the host computer as
either a speakerphone or an echo cancelling speakerphone, depending on which audio
mode is enabled. The MediaPort connects to a sound system and computer to bring the
far end audio and video into the local room, as well as program audio from the computer
or one of the MediaPort's line-level inputs. The MediaPort accepts a single microphone at
the Mic/Line Input, or can accept a microphone mix from an external DSP matrix processor.
The following MediaPort audio modes are selectable in the Extron Product Configuration
software:
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It is important to select the correct mode before configuring the MediaPort 200 with the host
PC. Changing the audio mode will cause the MediaPort to reboot, after which the computer
will recognize the MediaPort as a different device in the newly established mode (see
Setting Audio Modes
MediaPort 200 Audio Modes
Speakerphones and AEC (Acoustic Echo Cancellation)
Standalone Mode
External DSP with AEC Mode
MediaPort 200 Signal Flow
Setting Audio Modes
Standalone (no external DSP) – This is the default setting. In this mode, the
computer recognizes the MediaPort as a speakerphone and applies echo-cancellation
in the unified communications software. This mode is intended for use with a single
microphone connected to the Mic/Line input.
External DSP with AEC – In this mode, the computer recognizes the MediaPort as an
Echo Cancelling Speakerphone which prevents AEC from being applied in the unified
communications software. This mode is intended for use when a mic mix from an
external DSP matrix processor with AEC (acoustic echo cancellation) is connected to
the Mic/Line input.
on page 17 for more information).
MediaPort 200 • Theory of Operation 7