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Filename:
SAA7115_Datasheet.fm
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page 66
Last edited by H. Lambers
Philips Semiconductors
CS-PD Hamburg
CVIP2
Datasheet
SAA7115
Date:
10/23/01
Version:
0.67
Table 19
50Hz / 625 Lines VBI Data types supported by the data slicer block
The adjustment of the slicer processing to the input signal source is defined by the programming registers 59h to 5BH,
There are programmable offsets in the horizontal and vertical direction available: parameters HOFF[10:0] 5BH[2:0]
59H[7:0], VOFF[8:0] 5BH[4] 5AH[7:0], FOFF[5BH[7]] and VEP[5BH[5]]).
Contrary to the scaler counting scheme, the slicer offsets define the position of the H and V trigger events related to the
processed video field. The trigger events are the falling edge of HREF and the falling or rising edge of V123 (defined by
VEP[5BH[5]]) from the decoder processing part.
Note
:
The field ID, used for the slicers data packing, is taken at the internal pixel ‘1’ and line ‘1’ position. Hence for correct line
counting according ITU656 and for 60 Hz input signals (see Fig.23), the old value of the field ID is taken as ID reference.
This has effect on the I2C read back registers, on the LCR table, the LCR controlled field ID generation and the internal
header information of the slicers output stream.
For consistent ID interpretation, the vertical offset parameter VOFF for NTSC has to be set to 0x03. For this case the
LCR table covers the range from line 5 to 27 and line 21 corresponds to LCR18.
The relationship of these programming values to the input signal and the recommended values is outlined in table 7 to
table 10.
The register SLDMOD[4:0] 5DH[4:0] defines the Slicer Data Output Mode at the I-Port of the SAA7115.
This register enables the VBI output and defines the mode of data insertion into the I-port data stream.
Data type
50Hz / 625 Lines VBI Data Standards
No.
binary
DESCRIPTION
Data rate
(Mbits/s)
FRAMING
CODE
FRAMING
CODE
WINDOW
Hamming
check
Decoder
output data
format
European Teletext (WST625),
Chinese Teletext (CCST625)
Euro Teletext with
progammable Framing Code
reserved
Euro Closed Caption (CC625)
Euro Wide Screen Signalling
(WSS625)
VITC625
VPS
reserved
reserved
Open1 (5 MHz)
-
Y-C
B
-C
R
4:2:2
raw data
1
0001
6.9375
0x27
WST625
always
2
0010
6.9375
programma
ble
-
001 binary
0x1E3C1F
gen_text
optional
raw data
3
4
0011
0100
-
-
-
-
-
raw data
raw data
raw data
0.500
5
CC625
WSS625
5
0101
6
7
8
9
0110
0111
1000
1001
1.8125
5
-
-
5
10 binary
0x9951
-
-
programma
ble
programma
ble
-
-
-
-
VITC625
VPS
-
-
8-16us
-
-
-
-
-
raw data
raw data
raw data
reserved
raw data
10
1010
11
1011
Open2 (5,7272 MHz)
5.7272
8-16us
-
raw data
12
13
14
15
1100
1101
1110
1111
reserved
do not acquire (RAW)
do not acquire (Test)
do not acquire (active video)
-
-
-
-
-
-
-
-
-
-
-
-
reserved
raw data
reserved
Y-C
B
-C
R
4:2:2