Source display, Network – Extron Electronics VN-Matrix 200 Series User Manual

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Multicast RTP

This method uses a real-time variation of UDP (User Datagram Protocol), called RTP (Real-
time Transport Protocol). Multicast RTP allows a source to be displayed on any number of
displays.

VN-MATRIX

(encoder)

(decoder)

NETWORK

SOURCE

DISPLAY

RTP

Encoder sends data using RTP

to a multicast group

Any number of decoders can be

part of the multicast group

Figure 5.

Multicast RTP

The source encoder uses RTP to send data to a multicast group. The source encoder does
not need to know the IP address of any decoders that use that source.
RTP provides very low latency which is important for video transport. Unlike other
protocols, RTP packets include a timestamp. Therefore, if packets are received in the
wrong order they can easily be sorted into the correct order for display, or discarded if the
timestamp is out-of-date.
However, because RTP is a connectionless protocol, data delivery is not guaranteed. Where
data packets are lost (for example, due to excessive network traffic) the VNC 200 carefully
manages the data stream to minimize any image disruption.

Unicast RTP

Like multicast RTP, this method uses a real-time variation of UDP protocol, called RTP. This
method can be used where the network infrastructure does not support multicast traffic.
Unicast RTP should be used as a point-to-point configuration (that is, single source to
single display) but can be used for up to four displays.

VN-Matrix 200 Series • Introduction

This manual is related to the following products:

VNC 200 DVI VNE 200 DVI VND 200 DVI