Avaya Scopia Installing Manual page 49

H.264
H.264 Baseline
Profile
H.264 High Profile
H.320
H.323
H.323 Alias
H.350
H.460
HD
High Availability
June 2015
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.
See H.264 on page 49.
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.
H.320 is a protocol for defining videoconferencing over ISDN networks.
H.323 is a widespread set of protocols governing the communication
between endpoints in videoconferences and point-to-point calls. It defines
the call signaling, control, media flow, and bandwidth regulation.
See Alias on page 44.
H.350 is the protocol used to enhance LDAP user databases to add video
endpoint information for users and groups.
H.460 enhances the standard H.323 protocol to manage firewall/NAT
traversal, employing ITU-T standards. Endpoints which are already H.460
compliant can communicate directly with the PathFinder server, where the
endpoint acts as an H.460 client to the PathFinder server which acts as an
H.460 server.
A HD ready device describes its high definition resolution capabilities of
720p, a video resolution of 1280 x 720 pixels.
High availability is a state where you ensure better service and less
downtime by deploying additional servers. There are several strategies for
Installing the Avaya Scopia
Comments on this document? infodev@avaya.com
®
Streaming and Recording Server
H.264
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