Sensoray 817 - Manual (Page 7)

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Once all required data for one frame is transferred, an interrupt is triggered by the DSP
and the driver signals the application that data is available. The driver allocates multiple
capture buffers on the host side, so the next frame’s capture can start right away, if
required. However, the application must dispose of the data at the same average rate as
the data is coming in, to avoid buffer starvation and frame loss.
Sensoray provides drivers for Windows and Linux operating systems. For more
details, please refer to the corresponding Software Manual.
Deinterlacing
Model 817 performs optional deinterlacing of interlaced video to reduce motion
artifacts on captured images. The lines of one of the fields of video are recreated
from those of another field by using interpolation. This method provides better
visual quality compared to simple line doubling. Since the deinterlacing is
performed by the firmware running on the DSPs, it slows the capture rate down
slightly.
Video output crosspoint switch
Model 817 provides the means for monitoring analog video input signals on up to 4
monitors. A crosspoint switch connects any combination of 16 inputs to 4 outputs.
Each of the outputs has a software controlled on/off switch which allows connecting
multiple boards’ outputs in parallel.