Model 617 combines the
functions of a 16 x 4 video crosspoint switch, a frame grabber,
hardware JPEG compression and digital I/O into one PCI board.
The 617 accepts sixteen composite video inputs and
routes any four of them to separate video decoders for digitizing.
The use of four decoders eliminates losing frames during channel
switching. At least two decoders are always in sync and ready for
the JPEG compression circuit.
The 617 uses multiple frame buffers to interlace
full size images before they are compressed. This allows the 617 to
generate just one compressed image per frame instead of two per
Each of the four decoders
digitizes 30 frames per second to give an overall board throughput
of 30 fps for 640 x 480 interlaced frames. These throughputs include
JPEG compression. If all sixteen channels are used the frame rate
per channel is 1.8 fps.
Model 617 executes
hardware JPEG compression to greatly reduce the amount of memory
needed to store images. Hardware compression reduces the CPU and PCI
supports multiple 617ís in the same PCI bus. For example, two 617ís
may be used to expand the number of video inputs to thirty two.
If sixteen inputs are distributed between two boards the
overall capture rate increases to 3.7 fps per channel.
Any four of the sixteen inputs
may be routed to four output channels for display on video monitors.
A software-selectable switch after each buffer amplifier allows
multiple 617ís to share the same video monitor.
Each input channel has a
clamping circuit to minimize the effects of switching from one
floating camera signal to another. Image artifacts from a previous
channel will not affect the current channel.
Text caption buffer
The 617ís caption
buffer allows overlaying text on each frame. The text is within a
transparent box that may be positioned anywhere within the frame.
The text size and color are programmable.
The 617 also supplies
small-size uncompressed frames suitable for motion detection by the
host computer. These are 128 x 96 pixels or 256 x 192.
Model 617-4 is lower cost version of the 617 with
just four video inputs, four real-time video outputs, and 16 digital
I/O signals. Video inputs are connected directly to BNCís located on
the boardís hold-down bracket. The 617-4 has a faster frame capture
rate than the 617.
The overall board throughput is 120 fps for 320 x
240 size frames, 60 fps for 640 x 240 size frames and 30 fps for 640
x 480 interlaced frames.
options are available for connecting signals to the 617. Video
inputs and two real time outputs may be connected to low-cost
break-out cable 617C.
Low-cost video input panels 609TA, 609TC and 609TE connect to
the 617 via flat cables. Model 609TE fits into CD drive slot on the
front of a PC.
Model 609TA has
terminations and surge protection for 16 video inputs, 8 real-time
outputs and 32 digital I/O lines. Sixteen of the digital I/O lines
are mechanical relays that can be configured as NO or NC circuits.
The 609TA may be installed inside a 19-inch enclosure. Its two
mounting ears may be attached to the front or back of the box or
they may be removed. Up to three flat cables connect the 609TA to