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Video Protocols and Resolution Configuration for CP Conferencing
Polycom®, Inc. 113
CP Conferencing with H.263 4CIF
The video resolution of 4CIF in H.263 endpoints is only supported for conferences in which the video quality
is set to sharpness and for line rates of 384 Kbps to 1920 Kbps as shown in the following table.
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 the Collaboration Server, the slide’s
resolution will be as defined in the profile, i.e. SD, HD, CIF, etc.
For more information see Accessing the Resolution Configuration Dialog Box.
H.263 4CIF Guidelines
● H.263 4CIF is supported with H.323, and 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 RealPresence Capture Server or RSS
4000 system 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.
Video Quality vs. Line Rate
Endpoint
Line Rate Kbps
Video Quality
Motion Sharpness
Resolution Frame Rate Resolution Frame Rate
128 QCIF 30 CIF 30
256 CIF 30 CIF 30
384 - 1920+ CIF 30 4CIF 15
128 CIF 30
256 CIF 30
384 - 1920+ 4CIF 15