Comrex ACCESS 2USB, Руководство по эксплуатации продукта

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XXXIX.
AppendIX d - UsIng the ComreX ACCess deCoder downmIX FUnCtIon
A new feature of ACCESS firmware 2.8 allows a stereo connection profile to instruct the ACCESS decoder to decode
only one side of a stereo channel. This is useful in a scenario where two mono connections need to be sent to two
different destinations simultaneously.
ACCESS has the ability to run a single instance of an audio encoder. But the user can create multiple profiles using
that encoder to change behavior of either end of the link. The new option instructs the decoder to selectively
output only Left or Right channel of an incoming stereo feed. By applying at least two different profiles to the
outgoing connections, the system can effectively send only Left channel audio to one destination, and only Right
channel to another.
Use of the decoder downmix function has two drawbacks: As with all multi-streams in ACCESS, full duplex operation
is only supported to one destination. Also, both channels of the stream are actually delivered to both destinations
over the network, utilizing more incoming network bandwidth to the decoder than necessary.
The figure above shows a typical connection using the Decoder Downmix function from the encode site (A) to two
decode sites (B and C). For clarity, no return audio channel is shown from either B or C (although one could exist
from either but not both).
The user at site A builds two separate connection profiles, each using the same local stereo encode option. He will
turn off the remote encoder on both profiles. On the profile labeled “
Downmix L ”, under advanced options, he will
go to the remote connection side and select “ Downmix ”. Here he will instruct the remote decoder to output only
“ Mono Left Only ” through both Left and Right audio outputs.