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ADV7180BSTZ bảng dữ liệu(PDF) 59 Page - Analog Devices

tên linh kiện ADV7180BSTZ
Giải thích chi tiết về linh kiện  10-Bit, 4횞 Oversampling SDTV Video Decoder
PDF  120 Pages
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nhà sản xuất  AD [Analog Devices]
Trang chủ  http://www.analog.com
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ADV7180BSTZ bảng dữ liệu(HTML) 59 Page - Analog Devices

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Data Sheet
ADV7180
Rev. G | Page 59 of 120
Data Bytes
VBI_WORD_4 to VBI_WORD_N + 3 contain the data-words
that were 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 82.
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 78.
Table 77. 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
CCAP (NTSC and PAL)
3
001
100
CGMS (NTSC)
1
0
0
Table 78. 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
VPS (PAL)
00 (nibble mode)
6
26
0
36
01, 10 (byte mode)
3
13
0
20
VITC (NTSC and PAL)
00 (nibble mode)
6
18
0
28
01, 10 (byte mode)
3
9
0
16
WSS (PAL)
00 (nibble mode)
6
4
2
16
01, 10 (byte mode)
3
2
3
12
GEMSTAR_1× (NTSC)
00 (nibble mode)
6
4
2
16
01, 10 (byte mode)
3
2
3
12
GEMSTAR_2× (NTSC)
00 (nibble mode)
6
8
2
20
01, 10 (byte mode)
3
4
1
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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