Samsung S5PC110 Manual page 1483

S5PC110_UM
7.6 ANCILLARY DATA INSERTION (VBI MODULE)
The ITU-R BT.470 compliant TV signals include blanking lines, which do not possess video data. Some ancillary
data such as closed caption, content information, display aspect ratio control, and copy control information are
delivered within these blanking periods. The TVOUT module supports EIA-608 compliant closed caption (CC) and
extended data service (XDS) and IEC61880 / ITU-R BT.1119 compliant wide screen signaling (WSS). The VBI
sub-module draws the waveform of the ancillary data delivering signals.
The physical waveform of EIA-608 closed caption and extended data service signals is as follows:
50 ± 2 IRE
Blank Level
40 IRE
Sync Level
This waveform is inserted at the 21'st line of 525/60 standard video. The register SDO_ARMCC is used for
carrying the 2 byte data into the waveform including the parity bits. For the CC data and XDS data packet format
and its usage, refer to the Recommendation EIA-608, "Recommended Practice for Line 21 Data Service".
10.5 ± 0.25μs 12.91 μs
7 Cycles of
0.5035 MHZ
(Clock Run-In)
3.58 MHZ
Color Burst
(9 Cycles)
10.5 ± 0.25 μs
27.382 μs
Figure 7-9 EIA-608 Closed Caption and Extended Data Service
Two 7-Bit + Parity
ASCII Characters
(Data)
D0-D6 P D0-D6
S
A
T
R
A
I
R
T
T
Y
33.764 μs
7 6BTVOUT & VIDEO DAC
240-288 NS
Rise/Fall
Times
(2T Bar Shaping)
P
A
R
I
T
Y
7-11