Content Sharing Parameters In Content Highest Common (Content Video Switching) Mode; Content Settings; Avc Cp Content Setting - Polycom 1500 Administrator's Manual

RealPresence Collaboration Server (RMX) 1500/1800/2000/4000 Administrator's Guide
In Multiple Content Resolutions mode, content is shared in multiple streams, one for each video protocol:
H.263 and H.264. A separate video resource is used to process the Content shared with H.264-capable
endpoints and another for content shared with H.263-capable endpoints, with each endpoint receiving its
highest possible quality. This allows endpoints with different protocols to connect and disconnect without
having to restart Content sharing in the middle of a conference.
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).
Content Sharing Parameters in Content Highest
Common (Content Video Switching) Mode
This section describes the possible content sharing parameters when content Highest Common mode is
used:
● Content Settings
● Content Protocol
● Content Resolution

Content Settings

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.

AVC CP Content Setting

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
Polycom®, Inc.
H.264 Base Profile and High Profile Comparison .
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