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34 ImagePRO – Multi Format Image Processor Manual # 26-0302000-00 / Revision E
De-interlacing
In order to process an interlaced video source, the ImagePRO circuits must first de-interlace the image. De-
interlacing is the process by which interlaced video (video where even lines are scanned during one field and odd
lines are scanned during the next field) are converted to progressive format (where lines in the frame are sequentially
scanned).
ImagePRO utilizes Motion Adaptive De-interlacing (MAD) techniques to de-interlace most video sources. An alternate
mode, Field to Frame (Fld->Frm), avoids motion artifacts by converting individual input fields to progressive output
frames. While vertical resolution will be reduced in this mode, a significant reduction in video processing delay is
achieved.
Video Processing Delay
In order to eliminate video processing delay associated with frame rate conversion, it is recommended that the
ImagePRO output be locked to the input source frame rate. Video delays provided below assume that the input and
output frame rates are locked.
Video Processing Delay for ImagePRO
ImagePRO utilizes a MAD processor capable of processing interlaced NTSC and PAL inputs. Interlaced inputs at
other rates (such as 1920 x 1080i) are processed in Field to Frame mode (Fld->Frm).
When the MAD de-interlacing mode is selected, maximum video processing delay is 4 input fields (5 fields if the
output is not frame locked to the input).
If Field to Frame mode (Fld->Frm) is selected, maximum video processing delay is 1 input field. (2 fields if the output
is not frame locked to the input).
Video Processing Delay for ImagePRO-SDI and ImagePRO-HD
ImagePRO-SDI and ImagePRO-HD utilize an advance MAD processor capable of processing interlaced inputs up to
HDTV (1920 x 1080i) rates.
When the MAD de-interlacing mode is selected, maximum video processing delay is 2 input fields (3 fields if output
not frame locked to input).
The Pulldown Detect menu item selects between On and Off. This menu item is applicable only for standard video
(component, s-video, composite) video inputs. The default mode is off. The 3:2 Sequence Detect feature should be
turned on to process video derived from film source material.
Save Config
This menu item allows the user to save and name up to 64 input configurations that can be matched as part of the
ImagePRO auto acquisition process.
SAVE CONFIG AS
> File1
Save Config