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Frame
Rate
Model
311 can transfer 30 frames per second with the supplied software. It
supports a variety of digital formats including RGB24 and Y8 that are
directly compatible with Windows bitmaps.
PC/104+
bus
Model
311 requires the PC/104+ bus.
Synchronization
The
Model 311 uses special circuitry to achieve horizontal and
subcarrier synchronization to incoming video.
It
guarantees generation of the required pixel/line from a video source
in which line length can vary by several microseconds. This circuitry
allows the 311 adapter to quickly and accurately lock on to video
signals, regardless of source. Since the technique is completely
digital, the 311 can recognize unstable signals caused by VCR head
switching and adapt the locking mechanism to accommodate the source.
Image
scaling
Under
software control the 311 adapter can independently scale the X and Y
dimensions of the captured frame. Full-resolution video may be
reduced to any size down to the size of an icon. A software
selectable digital filter is available to minimize aliasing artifacts
induced by scaling.
A/D
Conversion
The
311’s signal processor uses two flash analog-to-digital
converters; one for chrominance and one for luminance. Each A/D
provides 2x over sampling of the camera signal. Over sampling,
combined with analog anti-aliasing filters, significantly reduces the
overall sensitivity to unwanted aliasing signals and enhances the
311’s digital filtering.
The
311 is capable of sending just the luminance data to the host’s
image buffer. This feature speeds capturing monochrome images.
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