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ADV7182ABCPZ Datasheet(PDF) 56 Page - Analog Devices

Part # ADV7182ABCPZ
Description  10-Bit, SDTV Video Decoder with Differential Inputs
PDF  102 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

ADV7182ABCPZ Datasheet(HTML) 56 Page - Analog Devices

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ADV7182A
Data Sheet
Rev. 0 | Page 56 of 102
Data Bytes
VBI_WORD_4 to VBI_WORD_N + 3 contain the data-words
decoded by the VDP in the transmission order. The position of
bits in bytes is in the inverse transmission order.
For example, closed captioning has two user data bytes, as
shown in Table 89.
The data bytes in the ancillary data stream are as follows:
VBI_WORD_4 = Byte 1[7:0]
VBI_WORD_5 = Byte 2[7:0]
The number of VBI_WORDS for each VBI data standard and
the total number of UDWs in the ancillary data stream is shown
in Table 85.
Table 84. 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
WSS (PAL)
24
000111100011110000011111
111110000011110001111000
CCAP (NTSC and PAL)
3
001
100
CGMS (NTSC)
1
0
0
Table 85. Total User Data-Words for Different VBI Standards1
VBI Standard
ADF Mode
Framing Code UDWs
VBI Data-Words
No. of Padding Words
Total UDWs
TTXT_SYSTEM_A (PAL)
00 (nibble mode)
6
74
0
84
01, 10 (byte mode)
3
37
0
44
TTXT_SYSTEM_B (PAL)
00 (nibble mode)
6
84
2
96
01, 10 (byte mode)
3
42
3
52
TTXT_SYSTEM_B (NTSC)
00 (nibble mode)
6
68
2
80
01, 10 (byte mode)
3
34
3
44
TTXT_SYSTEM_C (PAL and NTSC)
00 (nibble mode)
6
66
0
76
01, 10 (byte mode)
3
33
2
42
TTXT_SYSTEM_D (PAL and NTSC)
00 (nibble mode)
6
68
2
80
01, 10 (byte mode)
3
34
3
44
WSS (PAL)
00 (nibble mode)
6
4
2
16
01, 10 (byte mode)
3
2
3
12
CCAP (NTSC and PAL)
00 (nibble mode)
6
4
2
16
01, 10 (byte mode)
3
2
3
12
CGMS (NTSC)
00 (nibble mode)
6
6
0
16
01, 10 (byte mode)
3
3 + 3
2
12
1 The first four UDWs are always the ID.



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