User's Manual
NETNode
Phase 1 and 2 Units
NETNode
User Manual
NETNode-V2.3
5-66
DS000034 Unclassified
5. Streaming over IP
5.1. General Info
This section is relevant only to customers that have the NETNode-AVI-UP option fitted into
their NETNode unit.
5.2. Multicast Streaming
The NetNode supports both raw multicast streaming and RTSP/RTP streaming.
5.2.1. Streamer Operation
For multicast streaming the transport stream video data is transmitted over the Ethernet
network by means of “multicasting” i.e. continuous real-time streaming of packets accessible
to any PC connected to the network.
It is therefore possible for more than once connected PC to view the streamed data
simultaneously.
Two types of multicast IP packets are streamed.
Packets carrying video, audio and data as received by the unit;
Packets known as Session Announcement Protocol and Sessions Description Protocol
data (SAP and SDP), which contain information regarding the nature and location of the
stream itself.
5.2.2. Configuration Tab – Streamer Pane (Multicast Mode)
When you have got a Video or Audio product into the NETNode, you may want to stream
that information down a fixed IP link. The streamer pane enables you to configure this
facility easily.
Streaming is the transmission of digital audio or video or the listening and viewing of such
data without first storing it.
In Cobham systems we have the ability to carry streams using multicast protocols and these
streams can come from external or internal sources. This is controlled by the Source Mask.
To ensure we don‟t overload the bandwidth we want to be able to choose which nodes get
to receive the stream. This is controlled by the Destination Mask.
5.2.2.1. Service Name
Textual information naming the multicast stream as delivered in the SAP/SDP packets from
the unit. Default is “Mesh Streaming”
5.2.2.2. Source Mask
The Source Mask enables the streaming of Video that originates from a network connected
to either one of the two NETNode Ethernet ports or from the internal encoder (if it is fitted).