Data Transport Methods - Extron electronics VN-Matrix 325 User Manual

Data Transport Methods

Source (video) data from a VNC 325 encoder can be distributed to multiple decoders and
displays (one-to-many) or to a single decoder and display (point-to-point). Video data is
transported from the source (encoder) to the display (decoder) using one of three methods,
in order of preference, which are detailed in the following sections:
• Multicast real-time protocol (RTP)
Unicast RTP
•
• Unicast Transport Control Protocol (TCP)
You need to select among these three methods using the HTML pages, see
Encoders or
Multicast RTP
The multicast real-time protocol (RTP) data transport method is connected as shown in
figure 3. Multicast RTP is a one-to-many protocol that allows a source to be displayed on
an infinite number of displays. This transport method uses a real-time variation of User
Datagram Protocol (UDP), called RTP. In figure 3, the streaming data is identified as "RTPm".
IP Encoder
LAN-1
LAN-2 TEST
STATUS
ALARM
RTPm
Program Data
Monitoring and
Control
Figure 3.
NOTES:
— Second choice
Decoders" on page 25.
RTPm
Program Data
VN-MATRIX 325 SERIES
SERIAL DIGITAL VIDEO OVER IP
Network Netw
System Control
RTPm
Program Data
Typical Multicast RTP Application
• The UDP protocol is a standard Internet network protocol that is connection-
less, meaning that it does not use the hand-shaking that provide reliability,
ordering, or data integrity but is overhead intensive. Therefore, UDP can
be unreliable. On the other hand, RTP provides very low latency, which is
important for video transport.
•
The VN-Matrix 325 supports IGMP V2 for multicast streaming.
VN-Matrix 325 Serial Digital Over IP CODEC • Installation and Setup
— Best choice
— Acceptable
IP Decoder 1
LAN-1
LAN-2 TEST
STATUS
ALARM
IP Decoder 2
LAN-1
LAN-2
TEST
STATUS
ALARM
RTPm
Program Data
RTPm
Program Data
System Control System Control
IP Decoder 3
LAN-1
LAN-2 TEST
STATUS
ALARM
Decoder Configured as Controller
IP Decoder 4
LAN-1
LAN-2 TEST
STATUS
ALARM
VN-MATRIX 325 SERIES
SERIAL DIGITAL VIDEO OVER IP
LAN-1
LAN-2 TEST
STATUS
ALARM
LAN-1
LAN-2 TEST
STATUS
ALARM
Any number of decoders can
be part of the multicast RTP group.
"Configure
VN-MATRIX 325 SERIES
SERIAL DIGITAL VIDEO OVER IP
VN-MATRIX 325 SERIES
SERIAL DIGITAL VIDEO OVER IP
VN-MATRIX 325 SERIES
SERIAL DIGITAL VIDEO OVER IP
IP Decoder n-1
IP Decoder n
VN-MATRIX 325 SERIES
SERIAL DIGITAL VIDEO OVER IP
VN-MATRIX 325 SERIES
SERIAL DIGITAL VIDEO OVER IP
8