Matrox Vio, Installation And Hardware Reference

Page: 41 / 60

40 Appendix A: Glossary
• Reference levels
The zero and full-scale levels of an analog-to-digital converter. Voltages below a
black reference level are converted to a zero pixel value; voltages above a white
reference level are converted to the maximum pixel value. Together with the analog
gain factor, the reference levels affect the brightness and contrast of the resulting
image.
• RGB
A color space that represents color using the primary colors (red, green and blue)
as components.
• Saturate
To replace overflows (or underflows) in an operation with the highest (or lowest)
possible value that can be held in the destination buffer of the operation.
• Vertical blanking period
The portion of a video signal after the end of a frame and before the beginning of
a new frame
. During this period, the video signal is "blank".
See also horizontal blanking period .
• Vertical synchronization signal
The part of a video signal that indicates the end of a frame and the start of a new
one.
See also horizontal synchronization signal .