User`s guide

Polycom, Inc. 17
Release Notes
Polycom RealPresence Group Series, Version 4.1.5
For information on setting up People+Content IP, refer to the Administrator’s Guide for the Polycom
RealPresence Group Series. For information on using People+Content IP, refer to the User’s Guide for the
Polycom RealPresence Group Series.
New Features in 4.0.2
The version 4.0.2 software includes the features and functionality of version 4.0.1, with the following
additions.
Support for SVC-Based Conferencing
Version 4.0.2 of the Polycom RealPresence Group Series software adds support for the SVC (Scalable
Video Codec) protocol. In an SVC-based conference, each SVC-enabled endpoint transmits multiple bit
streams, called simulcasting, to the Polycom RealPresence Collaboration Server (RMX). The
RealPresence Collaboration Server sends or relays selected video streams to the endpoints without
sending the entire video layout. The streams are assembled into a layout by the SVC-enabled endpoints
according to each of their different display capabilities and layout configurations.
Advantages and Configuration Examples
SVC-based conferencing provides several benefits, including fewer video resource requirements, better
error resiliency, lower latency, and more flexibility with display layouts. For example, on RealPresence
Group Series systems in a four-way call, the layout is 1+3, which is the current speaker in a large window
and the other participants in smaller windows below the current speaker.
The following table shows the layout, resolutions, and frame rates for four-way calls at different call speeds.
Enabling and Disabling SVC Calls
You can make and receive SVC calls when the Polycom RealPresence Group system is connected to an
SVC-compatible bridge. Enable or disable SVC calls from the Dialing Preferences screen in the web
interface.
Call Speed Layout Current Speaker Participants
1920 kbps 1+3 720p30 360p15
1472 kbps 1+3 720p30 360p7.5
1024 kbps 1+3 720p15 180p15
768 kbps 1+3 720p7.5 180p7.5
512 kbps 1+3 360p7.5 180p7.5
384 kbps 1+2 180p15 180p7.5
256 kbps 1+1 180p7.5 180p7.5
128 kbps N/A Audio Only Audio Only
The maximum layout is 1+3 for four or more call participants. Experience may differ with fewer participants.