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RealPresence Collaboration Server (RMX) 1500/2000/4000 Administrator’s Guide
3-4 Polycom, Inc.
The Collaboration Server Web Client supports monitoring of H.263 4CIF information. The
H.245 or SDP tab includes the additional information.
The creation of a new H.263 4CIF slide is supported in the IVR Service in addition to the
current H.263 IVR slide. If users utilize the default Polycom slides that are delivered with
RealPresence Collaboration Server (RMX) 1500/2000/4000, the slide’s resolution will be as
defined in the profile, i.e. SD, HD, CIF, etc.
For more information see “High Resolution Slides” on page 17-17.
H.263 4CIF Guidelines
• H.263 4CIF is supported with H.323, SIP and ISDN connection endpoints.
• H.263 4CIF is supported in CP mode only.
• Click & View is supported in H.263 4CIF.
• AES encryption is supported with H.263 4CIF.
• Recording of H.263 4CIF conferences is supported by the RSS4000 and other devices.
• All video layouts are supported in H.263 4CIF, except 1x1 layout. In a 1x1 layout, the
resolution will be CIF.
• H.239 is supported in H.263 4CIF and is based on the same bandwidth decision matrix
as for HD.
The CP Resolution Decision Matrix
All the CP resolution options and settings are based on a decision matrix which matches
video resolutions to connection line rates, with the aim of providing the best balance
between resource usage and video quality at any given line rate.
The following factors affect the decision matrices:
• The Media cards installed in the system affect the number of video resources used for
each video resolution and frame rate, the supported video protocols and the maximum
resolution that can be used by the Collaboration Server. For example, 1080p 30fps
resolution is supported only with MPM+ and MPMx media cards and not by MPM
cards.
• The used video protocol: H.264 base Profile or H.264 High Profile. The H.264 High Profile
maintains the Video quality at bit rates that are up to 50% lower than previously
required. For example, a 512 kbps call will have the video quality of a 1Mbps HD call
while a 1Mbps HD call has higher video quality at the same (1Mbps) bit rate.
H.264 High Profile is supported only by MPMx media cards.
Table 3-2 Video Quality vs. Line Rate
Endpoint Line Rate Kbps
Video Quality
Resolution Frame Rate
128 CIF 30
256 CIF 30
384 - 1920+ 4CIF 15