Vbi Specifications - Barco STELLAR User And Service Manual

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VBI specifications

Teletext system B
Teletext system C
VITC
Data specifications
General
Usable lines 625 lines systems
Number of lines
Delay relative to video
Line code
Number of bits per line incl. run-in
Frame word, byte 3
Output Specifications
Data positioning (rel. to sync ref.)
Data amplitude
Output bit rate
Output eye-height
Output eye-width
Bandwidth limitation
Data specifications
General
Usable lines 525 lines systems
Number of lines
Delay relative to video
Line code
Number of bits per line including run-in
Frame word, byte 3
Output Specifications
Data positioning (relative to sync reference) 10.48 ms ± 0.34 ms
Data amplitude
Output bit rate
Output eye-height
Output eye-width
General
Usable lines 625 lines systems
Usable lines 525 lines systems
Number of lines
Line code
Output Specifications
Data positioning (rel. to sync ref.)
Data amplitude 625 lines systems
Teletext B, according To ITU-R
Rec.653-2
7 to 22, 320 to 335
Maximum 16 lines per field
Zero
NRZ
360 bits
11100100
Bit 13 at 12 ms ± 0.1 ms,
0: Black level (±15 mV)
1: 462 mV (±40 mV)
6.9375 Mbit/s ±25 ppm
> 95%
> 95%
≥ -3 dB, 6 MHz
≤ -12 dB, 6.75 MHz
≤ -40 dB, 8 MHz to 27 MHz
Teletext C, according to CCIR
Rec.653-2
10 to 22, 272 to 285
13 in field 1, 14 in field 2
Zero
NRZ
288 bits
11100111
0: 0 IRE (±2 IRE)
1: 70 IRE (±6 IRE)
5.727272 Mbit/s, 364 x line fre-
quency
> 90%
> 90%
Acc. To IEC 461
6 to 22, 319 to 335
10 to 20, 273 to 282
≤ 2 per field
NRZ
Half amplitude of first bit: 11.5 ms
± 0.3 ms
0: Black level (± 25 mV)
VBI specifications
A
A-13