Dream Vision DreamScaler4, Руководство пользователя

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4.0 MENU OPTIONS
22 R699761 - DreamScaler 4 User Manual
Color Space
The color space parameter sets the color space of the output format. Press the Up or Down button to show the
current color space. Press the same button again to select the alternate color space. Two analog color space
options are supported: YPbPr (default) and RGB. Three digital color space options are supported: RGB (default),
YCbCr 4:2:2 and YCbCr 4:4:4.
Output Level
The output level setting allows the user to specify the levels of the output signal, either Video (16-235) or PC (0-255)
• Video
• PC
Framerate Conversion
This parameter enables framerate conversion. There are four sets of controls: 24Hz, 25Hz, 50Hz and 60Hz
framerates. Use the ”Judder“ test pattern to determine whether your display support the desired framerate output,
then you can choose a framerate conversion between:
• Locked mode (1:1): This means that theDreamScaler 4 output frame rate tracks the input rate - i.e., the output
rate is locked to the input rate. In the 1:1 mode. There is always exactly one output frame for every input frame/
field. This mode has the advantage that there are never any dropped or repeated frames (unless the source
itself does this). One disadvantage of this mode is that when the video source is changed, the DreamScaler 4
has to re-lock to the new input signal timing. This can causes a disruption in the DreamScaler 4 output signal
and your display system may loose the video signal and temporarily.
• Unlocked mode: This means that the DreamScaler 4 frame rate is independent of the input rate. Regardless of
any variations in the input, the output frame rate will be fixed at the specified value. This mode results in the
most stable output signal as it’s independent of any changes in the input signal. Unlike the locked mode, the
DreamScaler 4 output signal will not be disrupted when the input source is changed. However, it’s guaranteed to
cause dropped or repeated frames as the input and output frame rates are not the same. Note that regardless of
what number the unlocked output frame rate is set to, it will never be identical to the input rate in this mode as
the output signal timing is independent of the input timing. These dropped/repeated frames can result in visible
irregularities in smooth motion, sometimes called motion judder or stutter.
• Locked mode (2:2 or 3:2): For standard definition interlaced sources the DreamScaler 4 can detect 2:2 and 3:2
pulldown cadences and convert these to either a 2:2 or 3:3 frame repetition rate. The main advantage of this is
for 60 Hz sources using 3:2 pulldown, as the irregular 3:2 pattern can be converted to 2:2 at 48 Hz or 3:3 at 72
Hz. In these modes, each original film frame is repeated exactly 2 or 3 times, respectively, and motion is
therefore smoother. Note that these modes are only useful when the video source is film-based - i.e., 3:2
pulldown for 24 Hz film on 60 Hz sources, and 2:2 pulldown for 25 Hz film on 50 Hz sources. If the source is not
film-based, then the end result is a lot like unlocked mode without that mode’s stability advantages.
Border Level
The border level setting is global, that is, there is only one border level setting for the system. To adjust the border
level, push the Up or Down button. The current level is shown. The default value is ‘0’. Push the Up or Down button
to decrease or increase the border level.
Picture Controls
The DreamScaler 4 has picture memories for each accepted format that are automatically saved and recalled on
each input. in addition to these controls, the DreamScaler 4 has output picture controls that can be used for multiple
applications. one application is to save two separate output modes for day/night usage where the ambient light
changes. another application is to adjust the output for separate connected displays. There are two memory slots
available, titled ”preset 1“ and ”preset 2“.
To make adjustments to one of these modes, first select the desired mode in the ”Preset“ submenu and then make
the desired changes to the output picture controls: brightness, contrast, saturation, hue, gamma setting, RGB gains
and RGB offsets.
There are also three additional memory slots which are dedicated to certified calibrator use and can be set during
the system installation. They are intentionally locked.
HDCP Mode
There are two HDCP modes:
• Off: HDCP is disabled at the DreamScaler 4’s HDMI output.
• On: The DreamScaler 4 continuously looks for a HDCP display device on its HDMI output.