Streaming Method Overview; Protocols Used For Streaming; Multicast Streaming Method - An Overview - Extron electronics SMP 351 User Manual

Streaming Method Overview

The streaming method used by the SMP 351 should be considered carefully. Multicast is
typically used for live multicasting a "one-to-many" session when it is known there will be
multiple viewers of a stream. Unicast streaming is used for on-demand video where the
network infrastructure does not support multicast traffic. Typically, unicast streaming is used
for a point-to-point (one-to-one) connection.

Protocols Used for Streaming

Streaming protocols must be selected based on the streaming method and the SMP 351
capability. The following transport layer protocols can be used for SMP 351 streaming.
Pull
Unicast
RTP (RTP over UDP) RTP (RTP over UDP) TS/UDP
The transport protocols are summarized in this section. For information on how to change
the SMP 351 transport protocol, see the
Multicast Streaming Method — An Overview
This streaming method is used for live video multicasting with low latency in a
"one-to-many" streaming session. The SMP 351 uses a variety of streaming protocols to
send data to a multicast group. Using multicasting, the SMP 351 does not need to know
the IP address of the devices viewing the stream. This allows a large number of users to
view the data simultaneously while using bandwidth efficiently. The maximum number of
connected users is dependent on the type of distribution network used.
NOTE: To use this streaming method, each network must be configured to pass
Multicast streaming can use push or pull streaming. It can push the data to a network for
broader distribution, or to many individual viewing devices. It can also use pull streaming,
where the SMP 351 waits for viewing devices to request the stream before broadcasting.
SMP 351 sends data
to a multicast group.
Figure 75.
Multicast
multicast broadcasts.
Streaming
Protocol
SMP 351
(encoder)
Multicast Streaming
Push
Unicast
TS/RTP
ES/RTP (Native RTP) ES/RTP (Native RTP)
Streaming section on page 30.
Streaming
Protocol
NETWORK
Streaming
Protocol
Streaming
Protocol
Streaming
Protocol
Streaming
Protocol
SMP 351 • Reference Information
Multicast
TS/UDP
TS/RTP
Viewing
device
Viewing
device
Viewing
device
Viewing
device
Additional
devices
Multiple devices can be
part of the multicast group.
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