Datasheet

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4.10 Raw Video Data Output
TVP5154
4-CHANNEL LOW-POWER PAL/NTSC/SECAM VIDEO DECODER
WITH INDEPENDENT SCALERS AND FAST LOCK
SLES163A – MARCH 2006 – REVISED JULY 2006
Table 4-2. Ancillary Data Format and Sequence
BYTE D7
D6 D5 D4 D3 D2 D1 D0 (LSB) DESCRIPTION
NO. (MSB)
0 0 0 0 0 0 0 0 0 Ancillary data preamble
1 1 1 1 1 1 1 1 1
2 1 1 1 1 1 1 1 1
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 0 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
• • •
• • •
— 1. Data Data byte Nth word
m. Data Data byte
NEP EP CS[5:0] Check sum
4(N+2)-1 0 0 0 0 0 0 0 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 of the corresponding line.
NN: Number of Dwords beginning with byte 8 through 4(N+2). 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 not.
CS: Sum of D0–D7 of DID through last data byte
Fill byte: Fill bytes make a multiple of four bytes from byte 0 to last fill byte. For teletext modes, byte 8 is the
sync pattern byte. Byte 9 is 1. Data (the first data byte).
The TVP5154 decoder can output raw A/D video data at 2 × sampling rate for external VBI slicing. This is
transmitted as an ancillary data block during the active horizontal portion of the line and during vertical
blanking.
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