ADV7183B Datasheet, PDF (55/100 Pages) Analog Devices – Multiformat SDTV Video Decoder

NTSC CCAP Data
Half-byte output mode is selected by setting CDECAD = 0;
the full-byte mode is enabled by CDECAD = 1. See the
GDECAD 238H Gemstar Decode Ancillary Data Format,
Address 0x4C[0] section. The data packet formats are
shown in Table 239H 72 and Table 240H 73.
Only closed caption data can be embedded in the output
data stream.
NTSC closed caption data is sliced on Line 21d on even and
odd fields. The corresponding enable bit has to be set high.
See the and the 241HGDECOL[15:0] Gemstar Decoding Odd Lines,
Address 0x4A[7:0]; Address 0x4B[7:0] sections.
ADV7183B
PAL CCAP Data
Half-byte output mode is selected by setting CDECAD = 0;
full-byte output mode is selected by setting CDECAD = 1.
See the 24HGDECAD Gemstar Decode Ancillary Data Format,
Address 0x4C[0] section. 243H
Table 72 and Table 24H 73 list the bytes of the data packet.
Only closed caption data can be embedded in the output data
stream. PAL closed caption data is sliced from Line 22 and
Line 335. The corresponding enable bits have to be set.
See the GDECAD 245H Gemstar Decode Ancillary Data Format,
Address 0x4C[0] and GDECOL[15:0] Gemstar Decoding Odd
Lines, Address 0x4A[7:0]; Address 0x4B[7:0] sections.
Table 72. PAL CCAP Data, Half-Byte Mode
Byte D[9]
D[8] D[7] D[6]
0
0
0
0
0
1
1
1
1
1
2
1
1
1
1
3
0
1
0
1
4
!EP
EP
EF
0
5
!EP
EP
0
0
6
!EP
EP
0
0
7
!EP
EP
0
0
8
!EP
EP
0
0
9
!EP
EP
0
0
10
!CS[8] CS[8] CS[7] CS[6]
D[5]
0
1
1
0
1
0
CS[5]
D[4] D[3]
0
0
1
1
1
1
0
0
0
1
0
0
CCAP Word1[7:4]
CCAP Word1[3:0]
CCAP Word2[7:4]
CCAP Word2[3:0]
CS[4] CS[3]
D[2]
0
1
1
0
0
1
CS[2]
D[1]
0
1
1
0
0
0
0
0
0
0
CS[1]
D[0]
0
1
1
0
0
0
0
0
0
0
CS[0]
Description
Fixed preamble
Fixed preamble
Fixed preamble
DID
SDID
Data count
User data-words
User data-words
User data-words
User data-words
Checksum
Table 73. PAL CCAP Data, Full-Byte Mode
Byte
D[9] D[8] D[7] D[6] D[5]
0
0
0
0
0
0
1
1
1
1
1
1
2
1
1
1
1
1
3
0
1
0
1
0
4
!EP
EP
EF
0
1
5
!EP
EP
0
0
0
6
CCAP Word1[7:0]
7
CCAP Word2[7:0]
8
1
0
0
0
0
9
1
0
0
0
0
10
!CS[8] CS[8] CS[7] CS[6] CS[5]
D[4]
0
1
1
0
0
0
0
0
CS[4]
D[3]
0
1
1
0
1
0
0
0
CS[3]
D[2]
0
1
1
0
0
1
0
0
CS[2]
D[1]
0
1
1
0
0
0
0
0
0
0
CS[1]
D[0]
0
1
1
0
0
0
0
0
0
0
CS[0]
Description
Fixed preamble
Fixed preamble
Fixed preamble
DID
SDID
Data count
User data-words
User data-words
UDW padding 0x200
UDW padding 0x200
Checksum
Rev. B | Page 55 of 100