
The Y'PBPR
and
Y'CBC R
scaling
discrepancy is unfortunate
enough, but it is compounded
by "full range"
Y'CBC R
used in
JPEG/JFIF, scaled similarly but
not identically to
Y'PBPR;
see
page 310. Confusion is
compounded by the EBU refer-
ring in Technical Standard
N10-1998 to CBC R analog color
difference components, when
they are properly denoted
PBPR.
luma and chroma. Eight-bit luma excursion was stan-
dardized at 219; chroma excursion was standardized at
224. Each color difference component has as excursion
224/219 that of luma. Since video component ampli-
tudes are usually referenced to luma excursion, ...