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Chapter 4-Additional Conferencing Information
Polycom, Inc. 4-13
The selection of the appropriate Content Resolution option, when several options are
available, should be based on the line rate and capabilities that can be used by most or all
endpoints connecting to the conference.
Examples:
• If the conference Line Rate is 1024 kbps.
and
•If the Content Settings selection is Graphics.
— Cascade Resolutions of HD720/5 and HD1080/15 are selectable with 256 kbps and
768 kbps allocated as the Conference Content Rate respectively.
The higher Cascade Resolution, HD1080/15 should be selected only if most of the
endpoints connecting to the conference can support a Content Rate of 768Kbps,
which requires the participant to connect to the conference at a Line Rate of
1024kbps.
When the lower Cascade Resolution HD720/5 is selected, the conference Content Rate
is set to 256 kbps. This will enable the endpoints that connect to the conference at a
Line Rate of at least 768 kbps to receive content in the Content channel. Endpoints
that connect to the conference at a line rate lower than 768Kbps, will receive
content in the video channel.
Live Video
HD720/5 256 384 512 768 768 768 768
HD720/30 512 768 768 768 768
HD1080/15 768 768 1152 1152
Table 4-7 Bit Rate Allocation to Content Channel by Line Rate, Content Settings & Cascade Resolution
in AVC Conferencing (Continued)
Content
Settings
Cascade
Resolution/
fps
Content Bit Rate Allocation per Conference Line Rate (kbps)
64
96
128
256
384 512
768
823
1024
1152
1472
1728
1920
2048
4096
6144