User manual
4.0 MENU OPTIONS
16 R699761 - DreamScaler 4 User Manual
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.
•Forced 3:2
This mode is intended to be used with High-Quality film source like HD-DVD and Blue-Ray. This forced cadence
mode is definitely useful for watching a movie from start to finish but they are less useful for content with a lot of
bad edits, and also if you are going to skip chapters.
•Forced 2:2
Same as Forced 3:2 but applying a 2:2 filter.
• 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 this weaves two adjacent fields together starting with an odd
field and combining it with the following even field.
• Game Mode 1:
This mode gives you minimal latency with edge-adaptive processing. The total amount of delay with source-
locked output mode set on the DreamScaler 4 is about half a frame of delay. Unlocked frame rates will increase
this delay.
• Game Mode 2:
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 DreamScaler 4 is about one and a half frames of delay. Unlocked
frame rates will increase this delay.
PReP™
PReP™ stands for ”Progressive ReProcessing“. This is the first video processing method that significantly improves
progressive video signals and removes artifacts caused by inferior interlaced-to-progressive conversion. Video
signals that originate in an interlaced format are often degraded by artifacts incurred when the signal is converted
from interlaced to progressive formats by general purpose chips in DVD players, AV receivers, and set-top boxes.
Poor interlaced-to-progressive conversion is especially problematic with large-screen HDTVs, as upscaling to
higher resolutions often amplifies artifacts created in the conversion process, making them more noticeable.
Tu r ning on PReP™ video processing will improve images on high-resolution displays and give access to the
Precision Deinterlacing menu. PReP™ should be activated only with progressive video input known to be originally
interlaced.
Cadence Detect
This option can be turn on with progressive input signals. When the output framerate is not locked to the input
framerate, this processing features an advanced cadence detection that can detect a film-based content (originally
encoded at 24fps) within an upscaled signal.
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 120%.
Image Shift and Field Swap
These adjustments are available with HD-SDI and analog inputs. They allow a fine adjustment of the picture to the
selected output. These functions can be set independently for different input formats.
Color Space
The color space setting allows the user to specify what the input signal is on the RGBHV/Component and HDMI
inputs. The YPbPr setting only applies to the RGBHV/Component input. The YCbCr 4:2:2 and YCbCr 4:4:4 and Auto
settings only apply to the HDMI inputs. The options are:
• RGB