Extron Electronics VN-Matrix 250 User Guide - Manual (Page 11)

Unicast RTP — An Overview
Similar to multicast RTP, this method uses a real‑time variation of UDP protocol, called
unicast RTP. This method can be used where the network infrastructure does not support
multicast traffic. Typically, this protocol is used for point‑to‑point configuration (single source
to single display), but can be configured to use up to a maximum of four displays.
NOTE: The encoder sends an individual stream to each decoder. This means that the
total bandwidth of the VN‑Matrix system increases as more decoders are added.
RTP 3
RTP 4
RTP (1-4)
Network
DISPLAYS
SOURCE
Encoder sends data using RTP
to up to 4 specified decoders.
RTP 1
RTP 2
VNE 250
VN-MATRIX RGB / HDMI OVER IP
CONTROL MENU
NEXT
ADJUST
STREAM
STATUS CONFIG ALARM VND 250
VN-MATRIX RGB / HDMI OVER IP
CONTROL MENU
NEXT
ADJUST
STREAM
STATUS CONFIG ALARM
VND 250
VN-MATRIX RGB / HDMI OVER IP
CONTROL MENU
NEXT
ADJUST
STREAM
STATUS
CONFIG ALARM
VND 250
VN-MATRIX RGB / HDMI OVER IP
CONTROL MENU
NEXT
ADJUST
STREAM
STATUS CONFIG ALARM
VND 250
VN-MATRIX RGB / HDMI OVER IP
CONTROL MENU
NEXT
ADJUST
STREAM
STATUS CONFIG ALARM
Figure 3. Unicast RTP Streaming
RTP provides very low latency which is important for video streaming. Unlike other
protocols, RTP packets include a time stamp. If packets are received in the wrong
order, they are sorted into the correct order for display or discarded if the time stamp is
out‑of‑date.
However, because RTP is a connectionless protocol, data delivery is not guaranteed.
When data packets are lost (for example, due to excessive network traffic), the
VNM 250 devices carefully manage the data stream to minimize image disruption.
TCP — An Overview
This method transports data using standard TCP (Transmission Control Protocol) and
should only be used for single point‑to‑point transfer of data.
TCP is a connection‑based protocol and, therefore, data is guaranteed to be delivered.
However, in the event of excessive network traffic, delivery may be delayed which
impacts real‑time performance. Therefore, TCP transport should be avoided for streaming
applications.
Network
SOURCE
DISPLAY
Decoder makes a
TCP connection with
a specified encoder.
Encoder
TCP TCP
VNE 250
VN-MATRIX RGB / HDMI OVER IP
CONTROL MENU
NEXT
ADJUST
STREAM
STATUS CONFIG ALARM VND 250
VN-MATRIX RGB / HDMI OVER IP
CONTROL MENU
NEXT
ADJUST
STREAM
STATUS CONFIG ALARM
Figure 4. TCP Streaming
VNM 250 • Introduction 5