Oracle Video server, Manual

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Where is Digital Video Used?
Concepts 1-13
DSLs include:
■
ADSL (Asymmetric DSL) — called “asymmetric” because the connection from
service provider to client delivers large amounts of data at high rates, but the
connection from client to service provider operates at a much lower rate.
■
HDSL (High-bitrate DSL) — currently the only widely deployed DSL and
essentially a replacement for traditional T1 service. T1 lines carry 1.5 Mbps and
have been available for many years, but require technicians to tune them to
optimum performance. HDSL modems can handle marginal connections with
little problem, so they are often much less expensive to install and operate.
Telephone companies are developing new DSLs for future use.
Enterprise
In an enterprise environment, needs are geared toward the particular company (or
“enterprise”) implementing the video solution. Content may still be as large as in
broadband environments, but viewers are served over a corporate LAN (using
switched
Ethernet networking), WAN, or intranet.
Switched Ethernet, like ATM, is a highly scalable networking protocol capable of
delivering very large amounts of data at high speeds. Additionally, an Ethernet
network can, when needed, be migrated to an ATM network topography.
Switched Ethernet, as opposed to unswitched or shared Ethernet, helps prevent
“bottlenecks” or slow-downs in network operation caused by multiple users
needing to read every data packet to determine which packets apply to which
clients. Likewise, switched Ethernet is a full-duplex protocol, meaning that each
hub can simultaneously send and receive, unlike other half-duplex protocols that
do only one or the other at one time. Switched Ethernet allocates and reserves
necessary bandwidth for each user connecting to the network, so latencies in
delivery of data over the network are minimized or eliminated.
Examples of enterprise usage of Oracle Video Server, over switched Ethernet,
would include:
■
Delivery of corporate training videos at a time convenient to the employee or
least disruptive to work schedules, rather than as a single scheduled event with
many employees in a single room at a time.
■
Corporate announcements from upper management or the Board of Directors.