DigitalVideoAndHDTVAlgorithmsAndInterfaces.pdf

Component digital 4:2:2 interface
Y’CBCR components are formed by scaling B’-Y’ and
R’-Y’ components, as described in CBCR 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.
Component analog R’G’B’ interface
The interface for analog R’, G’, and B’ signals is
described in Analog electrical interface and Analog
mechanical interface, on page 408. Zero (reference
blanking level) in the R’, G’, and B’ expressions corresponds
to a level of 0 VDC , and unity corresponds to
700 mV.
Sync is added to the green component according to:
7
3
G'sync = ( active ⋅G')
+ −sync
10
10
( )
Component analog Y’P BP R interface
The P B and P R color difference components of analog
HDTV are formed by scaling B’-Y’ and R’-Y’ components
as described in P B P R components for Rec. 709
HDTV on page 314. Although it is possible in theory to
have wideband P B and P R components – that is, P B and
P R components each having bandwidth similar to
luma – in practice they are lowpass filtered to about
half the bandwidth of luma.
The interface for analog Y’, P B , and P R signals is
described in Analog electrical interface and Analog
mechanical interface, on page 408. HDTV Y’P B P R signals
have zero setup. Sync is added to the luma component:
( )
7 3
Y'sync = Y'+ −sync
10 10
This excursion is conveyed as 1 V PP , with reference
blanking at 0 V DC. The picture excursion of the Y’ signal
is 700 mV. Figure 47.3 opposite shows a waveform
drawing of luma in a 1080i30 component analog
interface.
566 DIGITAL VIDEO AND HDTV ALGORITHMS AND INTERFACES
Eq 47.3
Eq 47.4