User`s guide

Polycom, Inc. 8
Release Notes
Polycom RealPresence Group Series, Version 4.1.5
When sharing content, one monitor will always be used for content and one for people. However, the
configuration can vary, depending on whether you have enabled self-view and how many people are
participating in the call. When you do not share content, the streams can be spread over both monitors,
depending on whether self-view is enabled and how many participants are in the call.
Multipoint Viewing Modes
The multipoint viewing mode configured on the host system defines what the far end receives. To find out
more about these modes, please contact the administrator of your Polycom RealPresence Group system.
Scalable Video Codec (SVC) Updates
Scalable video coding (SVC), an extension of the H.264 video compression standard, is supported on
RealPresence Group systems in both point-to-point and multipoint calls. Several SVC updates have been
added for release 4.1.3:
● Encryption — The RealPresence Group Series now supports encryption on both AVC and SVC
calls.
● Video optimization — The RealPresence Group system sends out only the negotiated, video
simulcast streams that are used by the other endpoints. This conserves computing power and
bandwidth on the RMX system. This also reduces the need for buffering, so endpoints exhibit less
jitter, packet loss, and network congestion. The optimization does not apply to audio.
● Bandwidth allocation — The Polycom Media Relay Conference now uses a dynamic media
bandwidth allocation algorithm to adjust media bit stream bandwidth. This feature reduces packet
loss and is specifically designed for SVC-based calls. Bandwidth allocation is enabled by default.
● Enhanced layout support — The RealPresence Group systems now support multiple far-end video
streams on an additional monitor. For more information, see Multipoint Layouts on page 7.
Microsoft Lync Interoperability Updates
The Microsoft Real-Time Video (RTV) license key name has changed to Lync Interoperability License and
is supported for all RealPresence Group Series systems. Several Microsoft Lync interoperability updates
are included with version 4.1.3:
● Recording indication — If a Lync participant starts recording an active call with a RealPresence
Group system, the RealPresence Group system displays a Recording Started message for several
seconds. Likewise, when recording stops, the RealPresence Group system displays a Recording
Stopped message.
● Spotlight feature — The RealPresence Group Series supports the Lync A/V MCU Spotlight feature.
When a participant is made the broadcaster in a call, the RealPresence Group system displays only
the broadcaster's video.
● Call hold and resume — The RealPresence Group Series system 4.1.3 supports call hold and
resume in H.323 calls with Lync 2013. Putting a call on hold pauses audio and video bidirectionally
between RealPresence Group systems, remote Lync clients, or Lync A/V MCUs.
● H.264 SVC — The RealPresence Group system supports H.264 SVC calling directly to a Lync 2013
client or AVMCU.
● Multiple layouts in Lync calls — In a Microsoft Lync 2013-hosted multipoint call, you can now view
multiple far-end sites in layouts. In previous RealPresence Group system releases, you could only
see the dominant speaker in Voice Switching Mode. This release offers the same enhanced layout
support available in both SVC and AVC multipoint calls. Because of a Lync limitation with Gallery
View, you can see five far-end sites on Lync-hosted multipoint calls.