62 Appendix C: Glossary
•RGB
A color space that represents color using the primary colors (red, green and blue)
as components.
• Synchronous function
A function that does not return control to the caller until it has finished executing.
See also asynchronous function.
• Vertical sync
The part of a video signal that indicates the end of a frame and the start of a new
one.
See also horizontal sync.
•VIA
Video Interface ASIC. A custom ASIC that connects all the data buses on the board
(the grab, VMChannel, and PCI bus) to one another, and directs and monitors
data flow "traffic". It is a video interface that provides various ways of inputting
and outputting data.
• VMChannel
Vesa Media Channel. An industry standard 32-bit bus designed for carrying video
data. On Matrox Meteor-II boards, it is used primarily to share data with other
Matrox imaging boards.