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Functional Overview
Available Camera Bandwidth
Note
Bandwidth calculations described in Table 1-1 do not include software decoding of
YUV images to RGB. This conversion time is dependent on processor speed.
© National Instruments Corporation
Figure 1-2 illustrates the key functional components of the NI CVS-1450
Series.
VGA Video Out
Non-Volatile
Storage
IEEE 1394
Interface
IEEE 1394a
Connectors
Figure 1-2. NI CVS-1450 Series Block Diagram
The IEEE 1394 bus provides a fixed amount of bandwidth that is shared
among the three IEEE 1394a ports on the NI CVS-1450 device. These ports
provide direct connection for up to three DCAM-compliant IEEE 1394
cameras, depending on the amount of bandwidth each camera requires.
Higher frame rates and larger image sizes require a higher data transfer rate
and use more bandwidth.
Table 1-1 shows the maximum number of cameras the NI CVS-1450 device
supports for three common video formats. Use this table as a guide when
determining the combination of cameras to use in your application.
By triggering your cameras at a frame rate slower than those rates listed in
Table 1-1, you can operate more cameras simultaneously. If the camera
Chapter 1
Intel
Celeron Processor
Bridge
Bridge
1-3
NI CVS-1450 Series Overview
SDRAM
128 MB
IO Control
SMB
Connector
D-SUB
Connector
NI CVS-1450 Series User Manual
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