DEVOS -- Enterprise Video System
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DEVOS
Set Top Box
DEVOS supports a Discover Video Set Top Box (STB). The STB operates as a
conventional STB where the user can use a IR Remote Control to simply select
the live video they wish to view.
Capacity
System capacity is a function of available network bandwidth, network I/O, CPU, and
for VoD delivery, the disk storage system. In most cases you would reach network
capacity before the other items become meaningful factors. DEVOS is delivered as
hardware systems or as software for your server or virtual machine, and actual
capacity depends on the performance of the underlying hardware and network.
DEVOS is typically capable of supporting 2,500 or more streams. The actual number is
determined by network I/O capacity, CPU use, and by other processes. Generally, you
will run out of network I/O before you run out of DEVOS streaming capacity. To
increase simultaneous live streaming capacity, use clustering, StreamPump, or lower
the streaming rate (see below).
DEVOS places no limits on the number of accounts, users, streams, content,
signage, Channels, or other features and functions. However, unlimited does not
mean "infinite", and actual capacity depends on hardware, network, and various
configuration options.
Signal Flow & Network Capacity Planning
Live video streams flow from a remote encoder to the server, and then from the
server to the viewers. For example, a Streamsie PC may be sending a live video
stream at 500,000 bps to the server. In this case, the uplink speed from the Streamsie
encoder to the server is important.
When a viewer accesses a player (or the live video is used by Digital Signage, Priority
Alert, Roku, or other device), the server delivers 500,000 bps stream to each viewer. In
this case the downlink speed from the server to the viewer is important. The
following table illustrates theoretical network utilization for a 500 Kbps live stream:
Number Of Viewers Network Bandwidth
1
0.5 Mbps
10
5.0 Mbps
100
50 Mbps
1,000
500 Mbps (0.5 Gbps)
5,000
2500 Mbps (2.5 Gbps)
10,000
5000 Mbps (5 Gbps)
