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 controlling 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.
Video scan rate: Frequency with which the video signal is scanned
onto an image display. The higher the video scan rate, the higher the
image quality and the less noticeable the flicker.
WAV: (File extension for) a popular file format for digitized audio
signals.
White balance: In an electronic camera, this is the adjustment of the
amplifiers for the three color channels (red, green and blue) so that
white areas of the scene do not show a color cast.
Y/C: Y/C is a color signal with two components: brightness
information (Y) and color information (C).
YUV: The color model of a video signal where Y delivers the
brightness information and U and V the color information.
