TVP5147M1PFP Datasheet, PDF (33/99 Pages) Texas Instruments – NTSC/PAL/SECAM 2x10-BIT DIGITAL VIDEO DECODER WITH MACROVISION DETECTION, YPbPr INPUTS, AND 5-LINE COMB FILTER

2.7.1 VBI FIFO and Ancillary Data in Video Stream
Functional Description
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 2−7 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 2−7. Ancillary Data Format and Sequence
BYTE
D7
D6
NO. (MSB)
0
0
0
1
1
1
2
1
1
3
NEP
EP
4
NEP
EP
5
NEP
EP
6
7
0
0
8
9
10
11
:
4N+7
0
0
D5
D4
D3
D2
D1
D0
(LSB)
DESCRIPTION
0
0
0
0
0
0
1
1
1
1
1
1 Ancillary data preamble
1
1
1
1
1
1
0
1
0
DID2 DID1 DID0 Data ID (DID)
F5
F4
F3
F2
F1
F0 Secondary data ID (SDID)
N5
N4
N3
N2
N1
N0 Number of 32-bit data (NN)
Video line # [7:0]
Internal data ID0 (IDID0)
0
Data Match Match Video line # [9:8] Internal data ID1 (IDID1)
error
#1
#2
1. Data
Data byte
1st word
2. Data
Data byte
3. Data
Data byte
4. Data
Data byte
:
m. Data
:
Data byte
:
Nth word
CS[7:0]
Check sum
0
0
0
0
0
0 Fill byte
NOTE: The number of bytes (m) varies depending on the VBI data service.
EP:
DID:
SDID:
NN:
IDID0:
IDID1:
CS:
Fill byte:
Even parity for D0−D5, NEP: Negated even parity
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
This field holds the data format taken from the line mode register bits [2:0] of the corresponding line.
Number of Dwords beginning with byte 8 through 4N+7. Note this value is the number of Dwords
where each Dword is 4 bytes.
Transaction video line number [7:0]
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.
Sum of D0−D7 of first data through last data 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.
SLES140—July 2005
TVP5147M1PFP
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