
Chapter 7 - Conference Types
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.
•Graphics - for standard graphics
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•Live Video - for video clips or live video display
Table
Conference Rate (Kbps) | 64 | 128* | 192* | 256* | 320* | 384 | 512 | 768 | 1152 | 1472 | 1536 | 1920 | ||
| Graphics | 0 | 64/0 | 64 | 64 | 128 | 128 | 128 | 256 | 256 | 256 | 256 | 256 | |
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Dual | 0 | 64/0 | 64 | 128 | 192 | 192 | 256 | 384 | 384 | 512 | 512 | 512 | ||
Stream | Graphics |
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Mode |
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Live Video | 0 | 64/0 | 128/ | 192/ | 256/ | 256 | 384 | 512 | 512 | 768 | 768 | 768 | ||
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| 64 | 128 | 192 |
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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:
•Entry Queues
•Highest Common Phase 2
•H.264