Chapter 4-Additional Conferencing Information
Polycom, Inc. 4-7
Table4 -5 summarizes the Maximum Resolution of Content and Frames per Second (fps) for Bit
Rate Allocations to the Content Channel.
Content Protocols
Two Content Protocols can be used for sharing content:
• H.263
• H.264
H.264 offers higher quality content, but is not supported by legacy endpoints. Depending on
the endpoints capabilities, you can determine the content sharing experience by selecting
the appropriate protocol and system behavior from the Content Protocol list:
•H.263 & H.264 Auto Selection
•H.263
•H.264 HD
•H.264 Cascade and SVC Optimized
H.263 & H.264 Auto Selection ()
The H.263 & H.264 Auto Selection option should be selected when Content is to be shared
using a mix of H.263-supporting and H.264-supporting endpoints.
Table 4-4 Decision Matrix - Bit Rate Allocation to Content Channel per Conference Line Rate
Content
Settings
Content Bit Rate Allocation per Conference Line Rate (kbps)
64
96 128 256 384 512 768
832
1024
1152
1472
1728 1920
Graphics 64 64 128 128 256 256 256 256
Hi Resolution
Graphics 64 128 192 256 384 384 512 768
Live Video 64 128 256 384 512 768 768 1152
Customized
Content Rate
The Content Bit Rate is selected from a menu in the Content Video
Definition pane. See "Selecting a Customized Content Rate” on page 4-13.
Table 4-5 Content - Maximum Resolution, Frames/Second per Bit Rate Allocation
Bit Rate Allocated to Content
Channel (Kbps)
Content
Maximum Resolution Frames/Second
From 64 and less than 512 H.264 HD720p 5
From 512 and up to 768 H.264 HD720p 30
From 768 and up to 1536 H.264 HD1080p 15