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6.6.
CONFIGURING THE SCALER
The 7712HDC scaler chip uses a process of filtering to in order to reduce the resolution from 1920 x 1080
(or 1280 x 720) to 720 x 480 (or 720 x 576). The Scaler menus are used to configure the cut-off
frequencies of the filters associated with the scaler hardware. The chart below shows the items available
in the Scaler menu. Sections 6.6.1 to 6.6.2 give detailed information about each of the menu items.
H Filter Cutoff
V Filter Cutoff
6.6.1. Setting the Scaler Horizontal filter Sharpness
Scaler
H Filter Cutoff
0.45 fs
0.15 to 0.50 fs
6.6.2. Setting the Scaler Vertical filter Sharpness
Scaler
V Filter Cutoff
0.45 fs
0.15 to 0.50 fs
6.7.
CONFIGURING THE VERTICAL INTERVAL PROCESSING
(MODEL 7712HDC-SN-EAES4 ONLY)
The VANC Data Processing menus are used to configure how vertical interval signals such as closed
captions and vertical interval time code (VITC) are processed. The chart below shows the items available
in the VANC Data Processing menu. Sections 6.7.1 to 6.10.4 give detailed information about each of the
menu items.
Captions
RP188 Reader
VITC Generator
VITC User Bits
525 VITC Line
625 VITC Line
Sets the cutoff frequency of the horizontal filter in the scaler
Sets the cutoff frequency of the vertical filter in the scaler
With this control, you can set the sharpness of the horizontal filter used
during the down conversion process.
picture.
With this control, you can set the sharpness of the vertical filter used during
the down conversion process. Larger numbers mean a sharper picture.
Controls whether closed captions will be displayed on the program video
outputs.
Controls whether RP188 Ancillary Time Code reader will read LTC or VITC.
Controls whether Vertical Interval Time Code (VITC) will be displayed on the
program video outputs.
Controls whether the VITC user bits will contain the original time or user
bits.
Sets VITC insertion line on 525 line video outputs.
Sets VITC insertion line on 625 line video outputs.
Revision 1.2
7712HDC HD Broadcast Quality Down Converter
Larger numbers mean a sharper
7700 MultiFrame Manual
7712HDC-25
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