HD9084 HDTV Caption Encoder Manual
OPERATION Page 3-17
3.4.1.2. SD Video Std
The SD Video Standard Menu allows the user to choose the SD-SDI upstream video standard.
The HD9084 currently supports the following SD-SDI video standards:
• 525i/ 59.94
• 625i/50
3.4.2. SD Captions/VANC
The SD Captions/VANC menu allows the user to setup and configure downstream SD captions. To
enter the SD Captions/VANC sub-menu, use the UP and DOWN arrows until SD CAPTIONS/VANC is
displayed on the front panel. Press SELECT to enter this menu. The following options are available in
the SD Captions sub-menu (section 3.4.2.1 to 0). To see a “quick reference” layout of the menu
system, please refer to section 3.4. Press SETUP to exit this level.
3.4.2.1. NTSC Line Select
This function allows the user to select which line the CEA-608 captions will be available on the
downstream 525 line video. The default setting for CEA-608 captions is line 21 for the 525 line video
format. The HD9084 is capable of inserting CEA-608 captions on lines 10 through 25 for 525 line video
format.
3.4.2.2. PAL Line Select
This function allows the user to select which line the CEA-608 captions will be available on the
downstream 625 line video. The default setting for CEA-608 captions is line 22 for the 625 line video
format. The HD9084 is capable of inserting CEA-608 captions on lines 10 through 25 for 625 line video
format.
3.4.2.3. Field 1 Keyer
The Field 1 Keyer function allows the user to control the Field 1 Keyer using the front panel KEYER
ON/OFF pushbutton or via GPI. If the Field 1 Keyer is set to Button Only, the front panel pushbutton is
enabled and will turn both Field 1 and Field 2 Keyers ON or OFF. If the Field 1 Keyer is set to GPI
mode, the user can first choose a GPI to control the Field 1 Keyer function. GPI’s A through G are
available. Once the GPI is set, the external trigger will now control the Field 1 Keyer. Both the KEYER
ON/OFF pushbutton and GPI’s cannot be used simultaneously.
3.4.2.4. Field 2 Keyer
The Field 2 Keyer function allows the user to control the Field 2 Keyer using the front panel KEYER
ON/OFF pushbutton or via GPI. If the Field 2 Keyer is set to Button Only, the front panel pushbutton is
enabled and will turn both Field 1 and Field 2 Keyers on or off. If the Field 2 Keyer is set to GPI mode,
the user can first choose a GPI to control the Field 2 Keyer function. GPI’s A through G are available.
Once the GPI is set, the external trigger will now control the Field 2 Keyer. Both the KEYER ON/OFF
pushbutton and GPI’s cannot be used simultaneously.
3.4.2.5. Setup Shift
It is common for 4:2:2 component to NTSC video encoders to add setup to line 21 regardless of
whether there is closed caption information on line 21 or not. Closed caption data generated at 0 IRE
on component video will be translated to 7.5 IRE when setup is added by the video encoder. The CEA
608-B waveform specification states there should be no setup on line 21. In order to eliminate the
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