Polycom, Inc. 3-1
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Video Protocols and Resolution Configuration for CP Conferencing

Video Resolutions in AVC-based CP Conferencing

The Polycom RMX 1800 always attempts to connect to endpoints at the highest line rate
defined for the conference. If the connection cannot be established using the conference line
rate, the Collaboration Server attempts to connect at the next highest line rate at its highest
supported resolution.
Depending on the line rate, the Collaboration Server sends video at the best possible
resolution supported by the endpoint regardless of the resolution received from the
endpoint.
The video resolution is also defined by the Video Quality settings in the Profile.
•Motion, when selected, results in lower video resolution at higher frame rates (30 fps to
60fps).
•Sharpness, when selected, results in higher video resolution at lower frame rate (30 fps
and lower). However, it can also be sent in 1080P 60fps.
The combination of frame rate and resolution affects the number of video resources
required on the MCU to support the call.
The following resolutions are supported:
• CIF 352 x 288 pixels at 30 or 60 fps.
• SD 720 x 576 pixels at 30 or 60 fps.
• HD 720p 1280 x 720 pixels at 30 or 60 fps.
• HD 1080p 1920 x 1080 pixels at 30 fps
• HD 1080p 1920 x 1080 pixels at 60 fps (Symmetric in Motion and Sharpness)

Video Display with CIF, SD and HD Video Connections

Although any combination of CIF, SD and HD connections is supported in all CP
conferences, the following rules apply:
• In a 1X1 Video Layout:
—SD: If the speaker transmits CIF, the MCU will send CIF to all participants,
including the SD participants. In any other layout the MCU will transmit to each
participant at the participant’s sending resolution.
The following video resolution information applies to AVC CP Conferencing Mode.