Data Translation DT3153, User Manual

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Principles of Operation
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Video Input Signals
This section describes the following aspects of the supported input
signals:
• Signal types,
• Video formats,
• Video input channels,
• Color controls,
• Pixel clock, and
• External trigger.
Signal Types
The DT3153 can acquire images from the following signal types:
• Composite (CVBS )
−
The Color Video Broadcast Standard,
where a single composite video signal contains both luminance
and chrominance information. The signal passes through high-
and low-pass filters on the board to separate the chrominance
and luminance signals. The decoded signals are represented as
8-bit data.
• S-Video
−
A digital representation of the CVBS signal. It contains
both luminance information and chrominance information. The
filters on the board are bypassed. S-video signals are generally
“cleaner,” since the high- and low-pass filters can sacrifice signal
integrity.