User`s manual

Appendix • 73
Appendix
Appendix A: Glossary
Brightness:
Attribute of a visual sensation according to which an area appears to exhibit
more or less light.
CCIR:
Committee Consulat International Radiotelegraphique. This is a standards
committee of the International Telecommunications Union, which made the
technical recommendation for European 625 line standard for video signals.
Composite Video:
Composite video (CVS/CVBS) signal carries video picture information for
color, brightness and synchronizing signals for both horizontal and vertical
scans.
CIF:
CIF has 352(H) x 288(V) luminance pixels, and 176(H) x 144(V) chrominance
pixels. QCIF is a similar picture format with one-quarter the size of CIF.
EIA:
Electronic Industry Association. An industry lobbying group; it collects
statistics and establishes testing standards for many types of home
electronics.
Field:
For interlaced video the total picture is divided into two fields, one even and
one odd, each containing one half of the total vertical information. Each field
takes one sixtieth of a second (one fiftieth for PAL) to complete. Two fields
make a complete frame of video.
Frame:
One frame (two fields) of video contains the full vertical interlaced information
content of the picture. For NTSC this consists of 525 lines and PAL a frame is
consisted of 625 lines.
Gamma:
Cathode ray tubes (CRTs) do not have a linear relationship between
brightness and the input voltage applied. To compensate for this non-linearity,
a pre distortion or gamma correction is applied, generally at the camera
source. A value of gamma equal to 2.2 is typical, but can very for different
CRT phosphors.
Hue: