Table of Contents
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Deinterlacing
There are several deinterlacing modes available on the iScan VP20, 'Film Bias' Mode, 'Video' Mode
and 'Auto' Mode. With the addition of the Precision Deinterlacing Card there are several additional
modes added; 2:2 Even, 2:2 Odd, Game Mode 1 and Game Mode 2. The functions of these modes
are described below:
•
Auto – This mode is the default. 'Auto' represents the best balance between automatic detection
of film and video sources, bad edit detection, and identification of mixed-mode sources.
This mode should be used when the content may be a mix of film and video content or you are
not sure.
•
Film Bias Mode – This mode is intended for use on content that is known to be film-based.
•
Video Mode – This mode is intended for use on content that is known to be video-based.
•
2:2 Even – This mode should be used when the user knows that the source is high-quality
2:2 pulldown (i.e. film-based content played back in a country with a 50Hz video standard)
and wants to avoid any loss of cadence lock while watching that source. This mode weaves
two adjacent fields together starting with an even field and combining it with the following odd
field. This will provide a higher quality overall signal than the 'Auto' or 'Film Mode' settings,
providing that the source really is 2:2 pulldown and does not have bad edits. Only one of the
'2:2' Deinterlacing settings is correct for any given source and the correct mode can be
chosen by simply trying both of them and selecting the one which does not result in combing
artifacts.*
•
2:2 Odd – This mode is very similar to '2:2 Even' except that that this weaves two adjacent fields
together starting with an odd field and combining it with the following even field.*
•
Game Mode 1 – This mode is intended for use with game consoles (like those from Sony,
Microsoft and Nintendo). This mode gives you minimal latency with edge-adaptive processing.
The total amount of delay with source-locked output mode set on the Vp20 is about half a frame
of delay. Unlocked frame rates will increase this delay.*
•
Game Mode 2 – This mode is intended for use with game consoles (like those from Sony,
Microsoft and Nintendo). This mode gives you minimal latency with both motion and edge-
adaptive processing. The total amount of delay with source-locked output mode set on the
VP20 is about one and a half frames of delay. Unlocked frame rates will increase this delay.*
*Only accessible when the Precision Deinterlacing Card is installed
Overscan
The Overscan function scales the input image proportionally in both vertical and horizontal
dimensions by the user-specified overscan factor. The purpose of Overscan is to remove unwanted
image portions around the perimeter of the image. The default overscan value is 0, which means
100% of the input image is shown. The maximum overscan value is 20 which means the input image
is scaled up by 20%.
To adjust the overscan level:
.
push the Up or Down button. The current level is shown.
2.
push the Up or Down button to decrease or increase the amount of overscan. The overscan
value is applied to all input aspect ratios and is independent of the Zoom value.
Line Offset
The line offset adjustment allows the user to vertically adjust the image, when the input signal is
480i or 576i on the HDMI Input. This function can be set independently for both 480i and 576i input
formats.
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