MediaPort 200 with Exter
nal DSP with AEC
HDMI Input
If the device connected to the HDMI input has embedded microphone audio, it is important
to mute the audio on the HDMI input. All near end speech audio should come from the
microphone mix sent from the external DSP with AEC connected to the Mic/Line input.
Audio Line Outputs
Analog Line Output
For an application that uses an external DSP with AEC in conjunction with the MediaPort
200, connect the analog Line output to the DSP as an AEC reference. Then send it to local
sound reinforcement from the DSP. The default setting for this output is stereo, but can be
configured to dual mono if desired.
NOTE:
Mic/Line Input signal is not sent to the analog Line output of the MediaPort 200.
USB Line Output
When using an external DSP with AEC, mute the USB Communications audio (far end) to
the analog Line outputs and send it to the DSP via the Ref output (see
Listening Levels Using the PCS Software
The MediaPort always routes USB Communications audio from the far end to the Ref
output. This port is intended for use with an external DSP with AEC, so that far end USB
communications audio can serve as an AEC reference on the DSP, and then be sent from
the processor to the local sound reinforcement system.
When USB communications audio to the Line output is muted, the Line output sends only
program audio to the DSP. This allows program audio to be managed separately from USB
communications audio. Program audio can be used as an AEC reference, and either mixed
to the same sound system as USB communications audio or sent to a separate sound
system.
Ref and Aux Outputs
The following outputs are on a shared connector on the MediaPort 200 rear panel:
•
When using an external DSP with AEC, the Ref output sends the USB communications
audio from the far end to the DSP as an AEC reference and to be sent to the local
sound reinforcement system.
•
The Aux Output contains only the Mic/Line Input signal from the MediaPort 200. This
output allows the Mic/Line Input signal to be sent to a voicelift system if local speech
reinforcement is needed. Alternatively, the Aux Output can send the Mic/Line Input
signal to a hardware video codec if one is in use (see
MediaPort 200 • with External DSP with AEC Application Setup
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