參數(shù)資料
型號: VPX322XE
廠商: MICRONAS SEMICONDUCTOR HOLDING AG
英文描述: Video Pixel Decoders
中文描述: 視頻解碼器像素
文件頁數(shù): 31/92頁
文件大?。?/td> 567K
代理商: VPX322XE
ADVANCE INFORMATION
VPX 322xE
31
Micronas
2.13. Data Slicer
The data slicer is only available on VPX 3225E and
VPX 3226E. Software drivers accessing the slicer I
2
C
registers should therefore check the VPX part number.
2.13.1. 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
main service:
programmable
side service:
VPS in line 16
side service:
CAPTION in line 21
side service:
WSS in line 23
programmable text parameters for main service
bit rate
clock run-in
framing code
error tolerance
number of data bytes
operation controlled by I
2
C registers
2.13.2. Data Broadcast Systems
Table 2
10 gives an overview of the most popular data
broadcast systems throughout the world. The data slicer
of the VPX can be programmed to acquire the different
data systems via a set of I
2
C registers.
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
Table 2
10:
Data Broadcast Systems
Text
System
TV
Standard
TV
Lines
Bit Rate
Modulation
Timing
CRI
FRC
No.
Bytes
WST
PAL
6
22
6.937500Mbit/s
NRZ
10.3
μ
s
5555
x
27
x
42
VPS
PAL
16
2.500000Mbit/s
Bi-Phase
12.5
μ
s
5555
x
51
x
13
WSS
PAL
23
0.833333Mbit/s
Bi-Phase
11.0
μ
s
3c78
x
f8
x
11
Caption
PAL
21
1.006993Mbit/s
NRZ
10.5
μ
s
aaa0
x
c2
x
4
VITC
PAL
6
22
1.812500Mbit/s
NRZ
11.2
μ
s
9
Antiope
SECAM
6
22
6.203125Mbit/s
NRZ
10.5
μ
s
5555
x
e7
x
37
WST
NTSC
10
21
5.727272Mbit/s
NRZ
9.6
μ
s
5555
x
27
x
34
NABTS
NTSC
10
21
5.727272Mbit/s
NRZ
10.5
μ
s
5555
x
e7
x
33
Caption
NTSC
21
1.006993Mbit/s
NRZ
10.5
μ
s
aaa0
x
c2
x
4
2xCaption
NTSC
10
21
1.006993Mbit/s
NRZ
10.5
μ
s
2aa0
x
b7
x
4
VITC
NTSC
10
21
1.812500Mbit/s
NRZ
11.2
μ
s
9
CGMS
NTSC
20
0.450450Mbit/s
NRZ
11
μ
s
10
b
3
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