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Polycom, Inc iii
Packet Loss Compensation (LPR and DBA) AVC CP Conferences ..............................3-34
Packet Loss ....................................................................................................................3-34
Causes of Packet Loss ..........................................................................................3-35
Effects of Packet Loss on Conferences ...............................................................3-35
Lost Packet Recovery ...................................................................................................3-35
Lost Packet Recovery Guidelines .......................................................................3-35
Enabling Lost Packet Recovery ..........................................................................3-35
Monitoring Lost Packet Recovery ..............................................................................3-36
Lecture Mode (AVC CP Only) ............................................................................................3-38
Enabling Lecture Mode ...............................................................................................3-38
Selecting the Conference Lecturer ......................................................................3-38
Enabling the Automatic Switching ....................................................................3-40
Lecture Mode Monitoring ...........................................................................................3-40
Restricting Content Broadcast to Lecturer ................................................................3-42
Muting Participants Except the Lecturer (AVC CP Only) ......................................3-43
Guidelines ..............................................................................................................3-43
Enabling the Mute Participants Except Lecturer Option ................................3-44
Audio Algorithm Support ...................................................................................................3-45
Guidelines ......................................................................................................................3-45
SIP Encryption ......................................................................................................3-45
Mono .......................................................................................................................3-45
Stereo ......................................................................................................................3-46
Monitoring Participant Audio Properties .................................................................3-47
Permanent Conference ........................................................................................................3-49
Guidelines ......................................................................................................................3-49
Enabling a Permanent Conference .............................................................................3-49
Video Protocols and Resolution Configuration for CP Conferencing . . . . . 4-1
Video Resolutions in AVC-based CP Conferencing .........................................................4-1
Video Display with CIF, SD and HD Video Connections ................................4-1
H.264 High Profile Support in CP Conferences .........................................................4-2
Guidelines ................................................................................................................4-2
CP Conferencing with H.263 4CIF ...............................................................................4-2
H.263 4CIF Guidelines ...........................................................................................4-3
The CP Resolution Decision Matrix .....................................................................................4-3
H.264 Base Profile and High Profile Comparison .....................................................4-4
Default Minimum Threshold Line Rates and Resource Usage Summary .............4-6
Resolution Configuration for CP Conferences ...................................................................4-8
Modifying the Resolution Configuration ...................................................................4-8
Resolution Configuration - Basic ..........................................................................4-9
Resolution Configuration - Detailed ..................................................................4-10
Flag Settings ..................................................................................................................4-12
Setting the Maximum CP Resolution for Conferencing ................................4-12
Minimum Frame Rate Threshold for SD Resolution .......................................4-12
Additional Video Resolutions ............................................................................................4-13
Additional Intermediate Video Resolutions .............................................................4-13
Microsoft RTV Video Protocol Support in CP Conferences ...........................................4-13
Guidelines ..............................................................................................................4-13