Polycom 3725-74600-004 Video Protocols and Resolution Configuration for CP Conferencing . . . . . 4-1

Table of Contents
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