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参数资料
| 型号： | TVP5147PFPRG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 颜色信号转换 |
| 英文描述： | COLOR SIGNAL DECODER, PQFP80 |
| 封装： | GREEN, PLASTIC, HTQFP-80 |
| 文件页数： | 29/100页 |
| 文件大小： | 1465K |
| 代理商： | TVP5147PFPRG4 |
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Functional Description
27
SLES099C—March 2007
TVP5147PFP
2.7.1 VBI FIFO and Ancillary Data in Video Stream
Sliced VBI data can be output as ancillary data in the video stream in ITU-R BT.656 mode. VBI data is output
on the Y[9:2] terminals during the horizontal blanking period. Table 27 shows the header format and
sequence of the ancillary data inserted into the video stream. This format is also used to store any VBI data
into the FIFO. The size of the FIFO is 512 bytes. Therefore, the FIFO can store up to 11 lines of teletext data
with the NTSC NABTS standard.
Table 27. Ancillary Data Format and Sequence
BYTE
NO.
D7
(MSB)
D6
D5
D4
D3
D2
D1
D0
(LSB)
DESCRIPTION
0
1
Ancillary data preamble
2
1
Ancillary data preamble
3
NEP
EP
0
1
0
DID2
DID1
DID0
Data ID (DID)
4
NEP
EP
F5
F4
F3
F2
F1
F0
Secondary data ID (SDID)
5
NEP
EP
N5
N4
N3
N2
N1
N0
Number of 32-bit data (NN)
6
Video line # [7:0]
Internal data ID0 (IDID0)
7
0
Data
error
Match
#1
Match
#2
Video line # [9:8]
Internal data ID1 (IDID1)
8
1. Data
Data byte
1st word
9
2. Data
Data byte
10
3. Data
Data byte
11
4. Data
Data byte
:
m. Data
Data byte
Nth word
CS[7:0]
Check sum
4N+7
0
Fill byte
NOTE: The number of bytes (m) varies depending on the VBI data service.
EP:
Even parity for D0D5, NEP: Negated even parity
DID:
91h: Sliced data of VBI lines of first field
53h: Sliced data of line 24 to end of first field
55h: Sliced data of VBI lines of second field
97h: Sliced data of line 24 to end of second field
SDID:
This field holds the data format taken from the line mode register bits [2:0] of the corresponding line.
NN:
Number of Dwords beginning with byte 8 through 4N+7. Note this value is the number of Dwords
where each Dword is 4 bytes.
IDID0:
Transaction video line number [7:0]
IDID1:
Bit 0/1 = Transaction video line number [9:8]
Bit 2 = Match 2 flag
Bit 3 = Match 1 flag
Bit 4 = 1 if an error was detected in the EDC block. 0 if no error was detected.
CS:
Sum of D0D7 of first data through last data byte.
Fill byte:
Fill bytes make a multiple of 4 bytes from byte 0 to last fill byte. For teletext modes, byte 8 is the sync
pattern byte. Byte 9 is the first data byte.
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