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Model
516 is a PC/104 frame grabber that captures and transfers full-frame
(640 x 480) video at 30 frames per second. It overcomes the low
bandwidth of the PC/104 bus by using hardware compression to produce
encoded MPEG2 data streams of 440 kB to 1875 kB per second. It also
has one audio input channel that is ssynchronized to the MPEG2 data.
Advantages
MPEG2
data reduces the amount of memory required to store full motion
video. The compressed data requires a smaller transmission bandwidth.
This makes it possible to transmit 30 frames/sec video over the
PC/104 bus or over a 100 Base-T Ethernet. The hardware compression
circuit uses a motion estimation algorithm to produce smooth images
from interlaced cameras. The length of MPEG2 video streams is not
limited by the viewing software.
Decompression
Encoded
MPEG2 data can also be decompressed by the 516's hardware to produce
composite video and audio. The video output is available at a BNC
connector and a flat cable header. The audio output is available at
an audio jack and the flat cable header
Video
channels
The
516 has four multiplexed video channels that function as four
separate composite channels or as two S-video inputs.
Digital
I/O
Three
bi-directional logic lines are under software control
Self
test
Digitized
video and audio inputs can be looped back to the output circuits to
allow camera adjustments. The 516's D/A can be programmed to generate
color test bars. This is useful for testing the video output channel
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