
S DTV test signals
45
ANSI/EIA-189-A,
Encoded Color
Bar Signal
(formerly denoted
EIA RS-189-A).
SMPTE EG 1,
Alignment Color Bar
Test Signal for Television Picture
Monitors.
Pronounced
ploodge.
This chapter summarizes the principal test signals used
for testing 480i and 576i video systems.
Colorbars
Figure 45.1 below is a sketch of the image produced by
the classic SMPTE colorbar test pattern. The upper 2/3
of the image contains a 75% white bar followed by
primary and secondary colors of 75% saturation. The
narrow, central region contains "reverse bars" inter-
leaved with black; this section is