Mcu Resource Capacities For Mixed Cp And Svc Conferences - Polycom RealPresence 1500 Administrator's Manual

When a RealPresence DMA system is part of the solution, both dial-in and dial-out, should originate
from the DMA. SVC endpoints receive a participant count from the DMA in order to decide on layout
and how many media streams they wish to receive. If participants are dialed out from the
conference, the call flow is not routed through the DMA resulting in the participant count and layout
information not being received.

MCU Resource Capacities for Mixed CP and SVC Conferences

In a mixed CP and SVC conference, video resources are allocated according to the MCU type and the
translation pools (AVC to SVC and SVC to AVC) used to convert video streams. Translation pools are
dynamically allocated, when the conference becomes a mixed CP and SVC conference; resources are not
released when the conference stops being a mixed CP and SVC conference. The translation pools send
one SVC to AVC stream with a resolution of 360p, two AVC to SVC streams with a resolution of 360p and
180p for AVC HD endpoints, and one video stream with a resolution of 180p for AVC SD endpoints. When
a video stream with a resolution of 360p is not available, a video stream with a resolution of 180p is sent
instead.
Translations between different endpoints can be done without using the highest resolution, thus saving
translation resources. CP video layouts in mixed CP and SVC conferences support the standard resolutions
as in normal CP conferences.
Taking these factors into consideration and the type of MCU deployed in the environment, the resource
capacities for a mixed CP and SVC conference can vary.
The following table describes an example of the resource capacity allocations for the RealPresence
Collaboration Server:
System Resources are now reported in terms of HD720p30 CP ports. One HD video port equals 3
CIF video ports.
Resource Capacity Allocations
Resource Type
Mixed CP and SVC (HD)
(Example)
HD720p30
SD (@ 30 fps)
SVC Only
CIF (@ 30 fps)
The first four resource types in the resource capacity allocations table are endpoints in a CP only conference
or a mixed CP and SVC conference before the actual resource allocations occur.
Polycom®, Inc.
Number of Available Ports
RMX 2000 RMX 4000
2x MPMx 4x MPMx
20 AVC 40 AVC
90 SVC 180 SVC
60 120
120 240
180 360
180 360
Conferencing Modes Overview
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