Polycom DOC2702A, RMX 1500 manual Content Settings, AVC Only Content Setting

Chapter 4-Additional Conferencing Information

Content Settings

The Content channel can transmit one of the following modes:

•Graphics – for standard graphics. This is the default mode in AVC conferences and the only supported mode for SVC conferences.

•Hi-res Graphics (AVC only conferences) – requiring a higher bit rate, for high quality display or highly detailed graphics.

•Live Video (AVC only conferences) – highest bit rate, for video clips or live video display.

•Customized Content Rate (AVC only conferences) - that allows manual definition of the Conference Content Rate.

AVC Only Content Setting

For Graphics, Hi-res Graphics and Live Video, the highest common Content bit rate is calculated for the conference each time an endpoint connects. Therefore, if an endpoint connects to an ongoing conference at a lower bit rate than the current bit rate, the Content bit rate for the current conference is re-calculated and decreased.

Bit rate allocation by the MCU is dynamic during the conference and when the Content channel closes, the video bit rate of the People conference is restored to its maximum.

During a conference the MCU will not permit an endpoint to increase its bit rate, it can however change its Content resolution. The RMX can decrease the allocated Content bit rate during a conference.

Table 4-3 summarizes the bit rate allocated to the Content channel from the video channel in each of the Content Settings according to the conference line rate:

Table 4-3Decision Matrix - Bit Rate Allocation to Content Channel per Conference Line Rate

Content Bit Rate Allocation per Conference Line Rate (kbps)

Content
Settings	64	128		256	384	512	768	1024	1472	1920	2048	4096	6144
	96						832	1152	1728
Graphics		64		64	128	128	256	256	256	256	256	256	1536
Hi Resolution		64		128	192	256	384	384	512	768	768	1536	1536
Graphics
Live Video		64		128	256	384	512	768	768	1152	1152	1536	1536
Customized		The Content Bit Rate is selected from a menu in the Content Video Definition pane.
Content Rate			See "Selecting a Customized Content Rate in AVC Conferences” on page 4-14.

Polycom, Inc. 4-7