ADLINK Technology RTV Series User Manual page 176

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:
Attribution of visual sensation according to which area appears to
be similar to one, or proportions of two, of the perceived colors
red, yellow, green, and blue.
NTSC:
Acronym to designate a color television broadcast standard used
in America and Japan. The (M) NTSC system uses 525 lines per
frame (2 interlaced fields), a 29.97 frame per second update rate,
and a YIQ or RGB color space. In each field, only 242.5 lines are
visible, for a total of 485 visible lines (typical value). A line lasts
63.56 ms, of which approximately 52 ms are conveying visible pix-
els.
PAL:
Acronym to designate a color television broadcast standard used
in Europe. The (B, G, H, I) PAL (or Phase Alternation Line) uses
625 lines per frame (2 interlaced fields), a 25 frame per second
update rate, and the RGB color space. In each field, only 287.5
lines are visible, for a total of 575 visible lines. A line lasts 64 ms,
of which approximately 52 ms are conveying visible pixels.
Saturation:
A characteristic describing color amplitude or intensity. A color of a
given hue may consist of low or high saturation value, which
relates to the vividness of color.
166 Appendix