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Design Guide for the Polycom SoundStructure C16, C12, C8, and SR12
9 - 40
Once the design is completed, the matrix looks very similar to the mono con-
ferencing case with the exception that the “Program Audio”, “VSX8000 In”,
“VSX8000 Out”, and “Amplifier” virtual channels have the stereo graphic
symbol next to their names signifying they are stereo virtual channels as
shown in the following figure.
To leverage the stereo capabilities of the VSX8000 codec, it is possible to adjust
the panning of the local room microphones to create relative positional infor-
mation based on the local talker location in the room. This information can be
transmitted as part of the stereo audio output signal to the remote participants
by adjusting the matrix crosspoint pan settings to reflect the position of the
microphones relative to the camera reference point.
Consider the room layout in the following figure that has microphone 1
located at one end of the table at site 1. This microphone has a relative position
of being “right” of the camera from the camera’s perspective as shown by the
dotted line from the microphone to the camera’s left/right reference line. If
you imagine yourself standing where the camera is and looking at the talker at
position 1, that talker would be on your right.