ADV7184_15 Datasheet, PDF (59/112 Pages) Analog Devices – Multiformat SDTV Video Decoder with Fast Switch Overlay Support

ADV7184
Table 74. Framing Code Sequence for Different VBI Standards
Error-Free Framing Code Bits
VBI Standard
Length in Bits (In Order of Transmission )
TTXT_SYSTEM_A (PAL)
8
11100111
TTXT_SYSTEM_B (PAL)
8
11100100
TTXT_SYSTEM_B (NTSC)
8
11100100
TTXT_SYSTEM_C (PAL and NTSC) 8
11100111
TTXT_SYSTEM_D (PAL and NTSC) 8
11100101
VPS (PAL)
16
10001010100011001
VITC (NTSC and PAL)
1
0
WSS (PAL)
24
000111100011110000011111
Gemstar 1× (NTSC)
3
001
Gemstar 2× (NTSC)
11
1001 1011 101
CC (NTSC and PAL)
3
001
CGMS (NTSC)
1
0
Error-Free Framing Code Reported by
VDP (In Reverse Order of Transmission )
11100111
00100111
00100111
11100111
10100111
1001100101010001
0
111110000011110001111000
100
101 1101 1001
100
0
Table 75. Total User Data-Words for Different VBI Standards¹
VBI Standard
ADF Mode
Framing Code
UDWs
TTXT_SYSTEM_A (PAL)
00 (nibble mode)
6
01, 10 (byte mode) 3
TTXT_SYSTEM_B (PAL)
00 (nibble mode)
6
01, 10 (byte mode) 3
TTXT_SYSTEM_B (NTSC)
00 (nibble mode)
6
01, 10 (byte mode) 3
TTXT_SYSTEM_C (PAL and NTSC)
00 (nibble mode)
6
01, 10 (byte mode) 3
TTXT_SYSTEM_D (PAL and NTSC)
00 (nibble mode)
6
01, 10 (byte mode) 3
VPS (PAL)
00 (nibble mode)
6
01, 10 (byte mode) 3
VITC (NTSC and PAL)
00 (nibble mode)
6
01, 10 (byte mode) 3
WSS (PAL)
00 (nibble mode)
6
01, 10 (byte mode) 3
Gemstar 1× (NTSC)
00 (nibble mode)
6
01, 10 (byte mode) 3
Gemstar 2× (NTSC)
00 (nibble mode)
6
01, 10 (byte mode) 3
CC (NTSC and PAL)
00 (nibble mode)
6
01, 10 (byte mode) 3
CGMS (NTSC)
00 (nibble mode)
6
01, 10 (byte mode) 3
1 _{The first four UDWs are always the identification word.}
VBI Data-
Words
74
37
84
42
68
34
66
33
68
34
26
13
18
9
4
2
4
2
8
4
4
2
6
3+3
Number of
Padding Words
0
0
2
3
2
3
0
2
2
3
0
0
0
0
2
3
2
3
2
1
2
3
0
2
Total UDWs
84
44
96
52
80
44
76
42
80
44
36
20
28
16
16
12
16
12
20
12
16
12
16
12
Rev. A | Page 59 of 112