RADVision SCOPIA XT4000 Series User's Guide Page 98
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H.225 H.225 is part of the set of H.323 protocols. It defines the messages and
procedures used by gatekeepers to set up calls.
H.235 H.235 is the protocol used to authenticate trusted H.323 endpoints and
encrypt the media stream during meetings.
H.239 H.239 is a widespread protocol used with H.323 endpoints, to define the
additional media channel for data sharing (like presentations) alongside the
videoconference, and ensures only one presenter at a time.
H.243 H.243 is the protocol used with H.323 endpoints enabling them to remotely
manage a videoconference.
H.245 H.245 is the protocol used to negotiate call parameters between endpoints,
and can control a remote endpoint from your local endpoint. It is part of the
H.323 set of protocols.
H.261 H.261 is an older protocol used to compress CIF and QCIF video
resolutions. This protocol is not supported by the XT Series.
H.263 H.263 is an older a protocol used to compress video. It is an enhancement
to the H.261 protocol.
H.264 H.264 is a widespread protocol used with SIP and H.323 endpoints, which
defines video compression. Compression algorithms include 4x4 transforms
and a basic motion comparison algorithm called P-slices. There are several
profiles within H.264. The default profile is the H.264 Baseline Profile, but
H.264 High Profile uses more sophisticated compression techniques.
H.264 Baseline
Profile
See H.264 on page 98.
H.264 High Profile H.264 High Profile is a standard for compressing video by up to 25% over
the H.264 Baseline Profile, enabling high definition calls to be held over
lower call speeds. It requires both sides of the transmission (sending and
receiving endpoints) to support this protocol. H.264 High Profile uses
compression algorithms like:
• CABAC compression (Context-Based Adaptive Binary Arithmetic
Coding)
• 8x8 transforms which more effectively compress images containing
areas of high correlation
These compression algorithms demand higher computation requirements,
which are offered with the dedicated hardware available in Scopia
®
Solution components. Using H.264 High Profile in videoconferencing
requires that both the sender and receiver's endpoints support it. This is
different from SVC which is an adaptive technology working to improve
quality even when only one side supports the standard.
Glossary
98 Avaya Scopia
®
XT Series User Guide April 2015
Comments? [email protected]
- Avaya Scopia 1
- XT Series User Guide 1
- Contents 5
- Figure 1: XT Series products 7
- XT Series User Guide 7 7
- Figure 2: Avaya Scopia 9
- XT7000 Series 9
- XT Series User Guide 9 9
- 10 Avaya Scopia 10
- Comments? [email protected] 11
- Figure 7: Scopia 12
- XT Executive 12
- About the XT Series 12
- Related Links 14
- About the XT Series on page 7 14
- About the Built-In MCU 15
- XT Series) 16
- Chapter 2: Getting Started 17
- Controlling the XT Series 18
- About this task 19
- Before you begin 19
- Procedure 19
- Getting Started 20
- XT Series User Guide 21 21
- Connecting to a Scopia 26
- Adjusting the Image Position 30
- 32 Avaya Scopia 32
- Installing Scopia 35
- XT Executive) 35
- XT Series User Guide 37 37
- Starting a Meeting 39
- Figure 29: Contact list 41
- XT Series User Guide 41 41
- 42 Avaya Scopia 42
- Figure 37: Add a new contact 45
- XT Series User Guide 45 45
- 46 Avaya Scopia 46
- XT Series User Guide 47 47
- 50 Avaya Scopia 50
- XT Series User Guide 53 53
- XT Series Endpoint 54
- XT Series User Guide 55 55
- Participating in Meetings 56
- Figure 64: Call settings 65
- XT Series User Guide 65 65
- Chapter 5: Recording Meetings 67
- XT Series User Guide 69 69
- Moderating a Videoconference 70
- Moderating Meetings 72
- XT Series User Guide 75 75
- Settings 77
- Activating the Screen Saver 79
- Recording 80
- XT Executive only) 82
- XT Series 86
- Flickering or blank screen 88
- Blank screen 88
- Screen layout cropped 88
- Solution 90
- Low battery power 90
- XT Remote Control Unit code 90
- Not connect to network 92
- Authentication required 92
- XT Series User Guide 93 93
- XT Series User Guide 95 95
- Endpoint Alias 97
- XT Series User Guide 97 97
- XT Series User Guide 99 99
- Glossary 100
- Avaya Scopia 100
- Media Control 101
- April 2015 Avaya Scopia 101
- XT Series User Guide 101 101
- XT Series User Guide 103 103
- SIP Registrar 105
- XT Series User Guide 105 105
- Unbalanced Microphone 107
- XT Series User Guide 107 107
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