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H.239/People+Content (H.239/P+C) Options
H.239 and People+Content are very similar in function, but differ in the type
of signaling used for each protocol. People+Content is the Polycom
proprietary protocol while H.239 is the industry standard. When an endpoint
can support both H.239 and People+Content protocols, H.239 is selected as
the preferred communications protocol.
In the Reservation Template Settings - Dual Stream mode drop down box,
three H.239 People+Content (H.239/P+C) Video streaming formats are
available.
•
•
•
Table 7-2: Content bitrate according to Content Resolution and Conference Line Rate
Conference Rate (Kbps)
Graphics
Dual
Hi-Res
Stream
Graphics
Mode
Live Video
128 Kbps is the minimum Line Rate setting for a H.239/People+Content
conference. When the Content channel opens, the required bit rate is taken
from the video channel bit rate, and may affect the quality of the transmitted
video quality. The bit rate allocated to the Content channel depends on the
conference type and the conference line rate, where the minimum is 64 Kbps,
and increases in multiple of 64 Kbps. The bite rate allocation is dynamic and
when the Content channel closes, the video bit rate is restored to its
maximum.
People+Content in a Cascading conference is enabled only for Video
Switching IP Only conferences, in a Star Cascaded topology.
H.239 and People+Content supports the following features:
•
•
•
Graphics - for standard graphics
Hi-res Graphics - for high quality display or highly detailed graphics
Live Video - for video clips or live video display
*
*
*
64
128
192
256
0
64/0
64
64
0
64/0
64
128
0
64/0
128/
192/
64
128
Entry Queues
Highest Common Phase 2
H.264
*
384
512
768
320
128
128
128
256
192
192
256
384
256/
256
384
512
192
Chapter 7 - Conference Types
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