Extron electronic VNR 100 manual Multicast RTP - An Overview, Multicast RTP Streaming

Multicast RTP — An Overview

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

RTP	Network	RTP
LAN-1		LAN-1
LAN-2		LAN-2
STATUS		STATUS
VN-MATRIX 225 SERIES		VN-MATRIX 225 SERIES
RGB/DVI OVER IP		RGB/DVI OVER IP

Encoder sends data using RTP to a multicast group.

SOURCE

RTP

LAN-1

LAN-2

STATUS

VN-MATRIX 225 SERIES

RGB/DVI OVER IP

RTP

LAN-1

LAN-2

STATUS

VN-MATRIX 225 SERIES

RGB/DVI OVER IP

RTP

LAN-1

LAN-2

STATUS

VN-MATRIX 225 SERIES

RGB/DVI OVER IP

RTP

Multiple decoders can be part of the multicast group.

Figure 2. Multicast RTP Streaming

The source encoder uses RTP to send data to a multicast group. The source does not need to know the IP address of the decoders that are using the source.

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are received in the wrong order, they are sorted into the correct order for display or discarded if the time stamp is out-of-date.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 decoder devices carefully manage the data stream to minimize any image disruption.

VNR 100 • Introduction 4