Unicast TCP
The unicast TCP data transport method uses standard TCP protocol and should be used for
single point-to-point transfer of data
only
. This method is connected as shown in
figure 5
.
NOTES:
•
Multiple decoder connections are theoretically possible using this method
but
not
recommended. Each additional connection creates extra loading on
the encoder CPU, which ultimately results in poor display performance. In
addition, multiple TCP streams carrying the same source data is an inefficient
use of network bandwidth.
•
While figure
5
shows two decoders, in the scenario shown only IP decoder 1
is set to actively decode data that is streamed to it. IP decoder 2 may be
in standby (set as
Device
Type:
None
, see “
Configure Encoders or
Decoders
“) or may be receiving streamed data from another encoder.
•
In figure
5
, IP decoder 2 is designated as the system controller.
System Control
Network
System Control
VN-MATRIX 325 SERIES
SERIAL DIGITAL VIDEO OVER IP
LAN-1
LAN-2
STATUS
ALARM
TEST
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VN-MATRIX 325 SERIES
SERIAL DIGITAL VIDEO OVER IP
LAN-1
LAN-2
STATUS
ALARM
TEST
Netw
VN-MATRIX 325 SERIES
SERIAL DIGITAL VIDEO OVER IP
LAN-1
LAN-2
STATUS
ALARM
TEST
Decoder Configured as Controller
Monitoring and
Control
IP Encoder
IP Decoder 1
IP Decoder 2
TCP/IP
Program Data
TCP/IP
Program Data
Each encoder is ‘paired’ to a decoder
with a point-to-point data link.
Figure 5.
Typical Unicast TCP Application
TCP is a connection-based protocol. Data is guaranteed to be delivered, however excessive
network traffic, which impacts real-time performance, may delay delivery.
Data and Control Routing
The system can be used over both switched (single segment) and routed (multi-segment)
networks
The VN-Matrix 325 system can be configured to run using either a single LAN port (1 or 2)
or both LAN ports. In the single port configuration, all data (image, audio, control, and
monitoring) is transported on the designated port. In the dual port configuration, image and
audio data is transported on one connection while the other LAN port is used for monitoring
and or management functions.
All system control is managed by the VNC 325 that has been designated as the controller.
Any changes made in the network browser are sent to the affected codec from the
controller via the network that has been assigned for streaming. The browser is accessible
via either network port on the unit that is configured as the controller.
Video and audio data can be transported over either of the LAN ports on the VNC 325 and
are independent of the system control data.
VN-Matrix 325 Serial Digital Over IP CODEC • Installation and Setup
10
