
Concerning the conversion between
Rec. 601 levels and the full-range
levels used in computing, see
Figure 27.3, on page 329.
universally have very loose tolerance - about +5% of
full scale- on the analog voltage associated with refer-
ence black. This induces black-level errors, which in
turn cause serious errors in the luminance reproduced
for black. In the absence of a display calibrator, you
must compensate these framebuffer black-level errors
by adjusting the BLACK LEVEL (or
BRIGHTNESS)
control on
your monitor. This act effectively marries the monitor to
the framebuffer.
The accuracy