vpx3224d ETC-unknow, vpx3224d Datasheet - Page 30

• Manufacturer Part Number: vpx3224d
• Description: Video Pixel Decoders
• Manufacturer: ETC-unknow

30
VPX 3225D, VPX 3224D
2.12. Data Slicer
The data slicer is only available on VPX 3225D. Soft-
ware drivers accessing the slicer I
therefore check the VPX part number.
2.12.1. Slicer Features
– 8-bit digital FBAS input
– 8-bit unbuffered ascii data output
– internal sync separation
– PAL and NTSC operation
– VBI and full-field mode
– automatic slicer adaptation
– text reception down to 30% eyeheight
– soft error correction
– simultaneous decoding of 4 different text services
– programmable text parameters for main service
– operation controlled by I
Table 2–11: Data Broadcast Systems
Text
System
WST
VPS
WSS
Caption
VITC
Antiope
WST
NABTS
Caption
2xCaption
VITC
CGMS
main service: programmable
side service:
side service:
side service:
bit rate
clock run-in
framing code
error tolerance
number of data bytes
TV
Standard
PAL
PAL
PAL
PAL
PAL
SECAM
NTSC
NTSC
NTSC
NTSC
NTSC
NTSC
VPS in line 16
CAPTION in line 21
WSS in line 23
2
C registers
TV
Lines
6–22
16
23
21
6–22
6–22
10–21
10–21
21
10–21
10–21
20
2
C registers should
Bitrate
6.937500Mbit/s
2.500000Mbit/s
0.833333Mbit/s
1.006993Mbit/s
1.812500Mbit/s
6.203125Mbit/s
5.727272Mbit/s
5.727272Mbit/s
1.006993Mbit/s
1.006993Mbit/s
1.812500Mbit/s
0.450450Mbit/s
Modulation
NRZ
Bi-Phase
Bi-Phase
NRZ
NRZ
NRZ
NRZ
NRZ
NRZ
NRZ
NRZ
NRZ
2.12.2. Data Broadcast Systems
Table 2–11 gives an overview of the most popular data
broadcast systems throughout the world. The data slicer
of the VPX 3225D can be programmed to acquire the dif-
ferent data systems via a set of I
The various data broadcast systems are specified by a
limited set of parameters:
– line multiplex (VBI)
– bit rate
– modulation
– start timing
– clock run-in (CRI)
– framing code (FRC)
– number of data bytes
Timing
10.3 s
12.5 s
11.0 s
10.5 s
11.2 s
10.5 s
9.6 s
10.5 s
10.5 s
10.5 s
11.2 s
11 s
PRELIMINARY DATA SHEET
CRI
’5555’x
’5555’x
’3c78’x
’aaa0’x
?
’5555’x
’5555’x
’5555’x
’aaa0’x
’2aa0’x
?
’10’b
2
C registers.
FRC
’27’x
’51’x
’f8’x
’c2’x
?
’e7’x
’27’x
’e7’x
’c2’x
’b7’x
?
–
Micronas
No.
Bytes
42
13
11
4
9
37
34
33
4
4
9
3