Polycom (RMX) 1500 User Manual

RealPresence Collaboration Server (RMX) 1500/1800/2000/4000 Administrator’s Guide 

Polycom®, Inc. 

144

In this mode, endpoints that do not support the content capabilities set for the conference will receive the 
content over the video (people) channel (Legacy content). 

This section describes the possible content sharing parameters when content Highest Common mode is 
used:

● Content Settings
● Content Protocol
● Content Resolution

The Content channel can transmit one of the following modes:

● Graphics – for standard graphics. This is the default mode in AVC conferences and the only 

supported mode for SVC conferences.

● Hi-res Graphics (AVC CP Only) – requiring a higher bit rate, for high quality display or highly detailed 

graphics.

● Live Video (AVC CP Only) – highest bit rate, for video clips or live video display.
● Customized Content Rate (AVC CP Only) - that allows manual definition of the Conference Content 

Rate.

For Graphics, Hi-res Graphics and Live Video, the highest common Content bit rate is calculated for the 
conference each time an endpoint connects. Therefore, if an endpoint connects to an ongoing conference 
at a lower bit rate than the current bit rate, the Content bit rate for the current conference is re-calculated 
and decreased. 

Bit rate allocation by the MCU is dynamic during the conference and when the Content channel closes, the 
video bit rate of the People conference is restored to its maximum.

During a conference the MCU will not permit an endpoint to increase its bit rate, it can however change its 
Content resolution. The Collaboration Server can decrease the allocated Content bit rate during a 
conference.

The following tables summarizes the bit rate allocated to the Content channel from the video channel in 
each of the Content Settings according to the conference line rate for Base Profile and High Profile settings.

For more information see 

.