Unicast Streaming Method - An Overview - Extron electronics SMP 351 User Manual

NOTE: IGMP multicast protocol is used by routers and switches to deliver streams to
subscribing endpoints. The SMP 351 delivers packets and frames onto the network
that are identified as multicast. An IGMP multicast conserves network bandwidth
because the SMP 351 will only send data when a connection is made by a user. All
network switches and routing equipment must be properly configured to support IGMP
snooping and IGMP query to avoid flooding all endpoints with unnecessary streaming
traffic.
Unicast Streaming Method — An Overview
This streaming method is used for on-demand video with low latency and uses a variety
of streaming protocols. It can be used where the network infrastructure does not support
multicast traffic. Typically, unicast streaming is used for a point-to-point (one-to-one)
connection (SMP 351 to single viewing device), but can be configured to use multiple active
connections.
Unicast streaming can use push or pull streaming. It can push the data to individual or
multiple viewing devices, or it can use pull steaming, where the SMP 351 waits for an
individual viewing device to request the stream before broadcasting.
SMP 351
(encoder)
SMP 351 sends data to
specified devices.
Figure 76.
NOTES:
• When unicast streaming, the SMP 351 sends an individual stream to each viewing
device. This means that the total bandwidth increases as the number of actively
connected viewing devices increases and the total bandwidth decreases as the
number of actively connected viewing devices decreases.
• In the figure above, n represents an unspecified number of additional streams.
1 to n
NETWORK
Unicast Streaming
Device 1
Viewing
device
Device 2
Viewing
device
Device 3
Viewing
device
Device n
Viewing
device
SMP 351 • Reference Information 184