504
11.3. Teletext
11.3.1. Description and specifications
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What is “Teletext”?
Teletext is the name of a system used to send still picture program data of text and graphics after multiplexing it in the
vertical sync blanking interval of the TV signals. Programs broadcast in Teletext include subtitled broadcasts, news
broadcasts, weather forecasts and stock market information. Teletext has achieved a high penetration rate in various
countries in Europe and Southeast Asia where the 625/50i system is used.
With Teletext, a total of 40 characters × 25 lines can be contained on a page (per screen), and between 100 and 899
pages of information can be displayed.
Teletext specifications
Teletext supports the following TV signals.
Teletext is superimposed onto the composite signals and Y/C signals.
• PAL (but PAL-Nc are not included.)
The vertical sync blanking interval (VBI) and Teletext waveforms are shown below.
The Teletext data can be output in lines 8 to 22 (first field) and lines 321 to 335 (second filed) in the vertical sync
blanking interval of the PAL signals.
A total of 45 bytes consisting of the Clock Run-In, Framing Code and data bytes (42 bytes) are superimposed in one
line.
VBI waveforms
Teletext waveforms
Clock Run-In
66IRE
0I
RE
1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1 1 0 0 1 0 0
Framing
Code
2byte
1byte
45byte
Teletext
Содержание VG-876
Страница 1: ...Video Signal Generator VG 876 Instruction Manual Ver 3 40 ...
Страница 2: ......
Страница 30: ...16 ...
Страница 57: ...Chapter 3 TIMING DATA SETTINGS 43 ...
Страница 103: ...Chapter 4 PATTERN SETTINGS 89 1 2 3 4 5 6 0 ...
Страница 134: ...120 GUI Display Selected port ...
Страница 135: ...Chapter 4 PATTERN SETTINGS 121 HEX Display Selected port ...
Страница 143: ...Chapter 4 PATTERN SETTINGS 129 ...
Страница 177: ...Chapter 6 HDCP SETTINGS AND EXECUTION 163 ...
Страница 205: ...Chapter 7 VG 876 SYSTEM SETTINGS 191 ...
Страница 223: ...Chapter 8 DATA COPYING ERASING 209 ...
Страница 237: ...Chapter 9 USEFUL FUNCTIONS 223 ...
Страница 312: ...298 Horizontally 2 split output Split Mode 0 2 select either one of them Data Transfer assignment Split Image ...
Страница 336: ...322 10 5 3 Data transfer method Normal MODE 2Lane output ...
Страница 338: ...324 Normal MODE 4Lane output ...
Страница 374: ...360 Assignment of each lane Lane 1 2 Lane 5 6 Lane 9 10 Lane 13 14 Lane 3 4 Lane 7 8 Lane 11 12 Lane 15 16 ...
Страница 376: ...362 Assignment of each lane ...
Страница 378: ...364 Assignment of each lane Lane 1 4 Lane 9 12 Lane 5 8 Lane 13 16 ...
Страница 380: ...366 Assignment of each lane Lane1 4 Lane9 12 Lane5 8 Lane 13 16 ...
Страница 382: ...368 Assignment of each lane Lane1 8 Lane9 16 ...
Страница 384: ...370 Assignment of each lane Lane1 8 Lane9 16 ...
Страница 386: ...372 Assignment of each lane Lane1 8 Lane9 16 ...
Страница 388: ...374 Assignment of each lane Lane1 4 Lane9 12 Lane5 8 Lane 13 16 ...
Страница 390: ...376 Assignment of each lane Lane1 4 Lane9 12 Lane5 8 Lane 13 16 ...
Страница 392: ...378 Assignment of each lane Lane1 16 ...
Страница 453: ...Chapter 10 INTERFACE SETTINGS 439 Connection figure of VM 1876 MX s ...
Страница 464: ...450 Reverse Mode Top Bottom Reverse Mode LR TB ...
Страница 465: ...Chapter 10 INTERFACE SETTINGS 451 Multi VGMode V4Div Vertical Split Reverse Mode No Reverse Reverse Mode Left Right ...
Страница 466: ...452 Reverse Mode Top Bottom Reverse Mode LR TB ...
Страница 467: ...Chapter 10 INTERFACE SETTINGS 453 Multi VGMode V2Div Vertically 2 split Reverse Mode No Reverse Reverse Mode Left Right ...
Страница 468: ...454 Reverse Mode Top Bottom Reverse Mode LR TB ...
Страница 495: ...Chapter 10 INTERFACE SETTINGS 481 2 When Video Width is 8 bit ...
Страница 496: ...482 3 When Video Width is 10 bit ...
Страница 501: ...Chapter 10 INTERFACE SETTINGS 487 2 When iTMDS output ...
Страница 504: ......
Страница 538: ...524 ...