Datasheet

Table Of Contents
ADV7188
Rev. A | Page 59 of 112
Table 74. Framing Code Sequence for Different VBI Standards
VBI Standard Length in Bits
Error-Free Framing Code Bits
(In Order of Transmission )
Error-Free Framing Code Reported by
VDP (In Reverse Order of Transmission )
TTXT_SYSTEM_A (PAL) 8 11100111 11100111
TTXT_SYSTEM_B (PAL) 8 11100100 00100111
TTXT_SYSTEM_B (NTSC) 8 11100100 00100111
TTXT_SYSTEM_C (PAL and NTSC) 8 11100111 11100111
TTXT_SYSTEM_D (PAL and NTSC) 8 11100101 10100111
VPS (PAL) 16 10001010100011001 1001100101010001
VITC (NTSC and PAL) 1 0 0
WSS (PAL) 24 000111100011110000011111 111110000011110001111000
Gemstar 1× (NTSC) 3 001 100
Gemstar 2× (NTSC) 11 1001 1011 101 101 1101 1001
CC (NTSC and PAL) 3 001 100
CGMS (NTSC) 1 0 0
Table 75. Total User Data-Words for Different VBI Standards
1
VBI Standard ADF Mode
Framing Code
UDWs
VBI Data-
Words
Number of
Padding Words
Total UDWs
00 (nibble mode) 6 74 0 84 TTXT_SYSTEM_A (PAL)
01, 10 (byte mode) 3 37 0 44
00 (nibble mode) 6 84 2 96 TTXT_SYSTEM_B (PAL)
01, 10 (byte mode) 3 42 3 52
00 (nibble mode) 6 68 2 80 TTXT_SYSTEM_B (NTSC)
01, 10 (byte mode) 3 34 3 44
00 (nibble mode) 6 66 0 76 TTXT_SYSTEM_C (PAL and NTSC)
01, 10 (byte mode) 3 33 2 42
00 (nibble mode) 6 68 2 80 TTXT_SYSTEM_D (PAL and NTSC)
01, 10 (byte mode) 3 34 3 44
00 (nibble mode) 6 26 0 36 VPS (PAL)
01, 10 (byte mode) 3 13 0 20
00 (nibble mode) 6 18 0 28 VITC (NTSC and PAL)
01, 10 (byte mode) 3 9 0 16
00 (nibble mode) 6 4 2 16 WSS (PAL)
01, 10 (byte mode) 3 2 3 12
00 (nibble mode) 6 4 2 16 Gemstar 1× (NTSC)
01, 10 (byte mode) 3 2 3 12
00 (nibble mode) 6 8 2 20 Gemstar 2× (NTSC)
01, 10 (byte mode) 3 4 1 12
00 (nibble mode) 6 4 2 16 CC (NTSC and PAL)
01, 10 (byte mode) 3 2 3 12
00 (nibble mode) 6 6 0 16 CGMS (NTSC)
01, 10 (byte mode) 3 3 + 3 2 12
1
The first four UDWs are always the identification word.