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Polycom® RealPresence Collaboration ServerVirtual Edition Administrator’s Guide
2-2 Polycom, Inc.
All endpoints that do not support the H.264 SVC protocol such as H.263, H.264, or RTV, are
considered AVC endpoints.
The MCU processes the received video, transcodes it and sends the resulting video streams
to the endpoints. The video processing that is required differs according to the video session
set for the conference, with all the processing performed by the MCU. For more details, see
"AVC Conferencing - Video Session Types” on page 2-4.
Media Relay - SVC Conferencing
Media Relay SVC Conferencing is based on the SVC (Scalable Video Codec) video protocol
and SAC audio protocol. It offers high resolution video conferencing with low end-to-end
latency, improved Error Resiliency and higher system capacities.
The Polycom multipoint media server, serves as an integrated media relay engine that
provides media streams for displaying conferences at low latency video experience in video
conferences. For more details see, "SVC-based Conferencing” on page 2-9.
Mixed CP and SVC Conferencing
This type of conference enables participants with SVC-enabled endpoints and AVC
endpoints to participate in the same conference.
Each endpoint connects according to its capabilities. The MCU processes the AVC video
streams and converts them into SVC video Streams and relays them to the SVC participants
that constructs the video layout on the endpoint.
In the same way, the MCU processes the video streams received from the SVC participants,
converts them into AVC video and then transcodes all the video streams to compose the
video layout that is sent to the AVC endpoints.
Conferencing Capabilities in the Various Conferencing Modes
The following table summarizes the conferencing capabilities and options available in the
different Conferencing Modes.
Table 2-1 Conferencing Capabilities in the Different Conferencing Modes
Feature CP Only Mixed CP & SVC SVC Only
Operator
Conferences
Entry Queues
* * *
Permanent
Conference
Cascading
** **
IVR
Reduced IVR set for
SVC endpoints
Dial Out