參數(shù)資料
型號(hào)： TVP5146PFPG4
廠商： TEXAS INSTRUMENTS INC
元件分類： 顏色信號(hào)轉(zhuǎn)換
英文描述： COLOR SIGNAL DECODER, PQFP80
封裝： GREEN, PLASTIC, HTQFP-80
文件頁(yè)數(shù)： 40/109頁(yè)
文件大小： 1658K
代理商： TVP5146PFPG4
28
SLES084C August 2007
TVP5146
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
EP:
Even parity for D0–D5
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 D0–D7 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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