Appendix E: Glossary 339
TrueColor: The name indicates an image with enough
color resolution to appear “true to life”. In practise,
TrueColor normally refers to 24-bit RGB color, which
allows about 16.7 million combinations of the red,
green and blue primary colors. Bit, HiColor
TWAIN driver: TWAIN is a standardized software
interface allowing graphics and capture programs to
communicate with devices that supply graphical data.
If the TWAIN driver is installed, the capture function
of a graphics application can be used to load images
directly from your video source into the program. The
driver supports 32-bit programs only and captures
images in 24-bit mode.
VCR: “Video cassette recorder”.
VHS: “Video Home System” – Popular video standard
for home VCRs. Half-inch tape is used to store
“composite” signals incorporating both brightness and
color information.
VISCA: Protocol used with certain devices for control-
ling external video sources from computers.
Video8: Analog video system using 8mm tape. Video8
recorders generate composite signals.
Video CD: CD-ROM standard that uses MPEG
compressed videos.
Video decoder: Converts digital information into
analog video signals.
Video encoder: Converts analog video signals into
digital information.
Video for Windows: A Microsoft Windows system
extension that can record digital video sequences to
files on a hard drive and subsequently play them back.
