
Component digital 4:2:2 interface
Y'CBC R components are formed by scaling
Y', B'-Y'
and
R'-Y'
components, as described in
CBC R components for
Rec. 709 HDTV
on page 316. TRS is inserted as
described in
TRS in HD-SDI
on page 392. The HD-SDI
interface is described
HD-SDI coding,
on page 398. It is
standard to subsample according to the 4:2:2 scheme
(sketched in the third column of Figure 10.1, on
page 90). Image quality wouldn't suffer if subsampling
were 4:2:0- that is, if color differences were subsam-
pied vertically as well as horizontally- but this would
be inconvenient for hardware design and ...