Extron electronic VNR 100 manual Unicast RTP - An Overview, Unicast TCP - An Overview, Source

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.

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RTP 1-4 Network RTP 1

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Encoder sends data using RTP to up to 4 specified decoders.

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RTP 3

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are received in the wrong order, they are sorted into the correct order for display or discarded if the time stamp is out-of-date.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

Unicast TCP — An Overview

This method transports data using standard TCP (Transport 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 will impact real-time performance.

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TCP TCP

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Encoder	Decoder makes a TCP
SOURCE	connection with a
	specified encoder.

DISPLAY

Figure 4. Unicast TCP Streaming

The decoder defines which source to connect to. Other than defining an IP address and source type (if required), no special source encoder setup is required.

VNR 100 • Introduction 5