IN1604 DTP and IN1604 HD Scalers • Operation
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Auto-Image
— Press the Navigation buttons to turn the automatic per-input Auto-Image
mode On or Off (default).
When enabled and a new input frequency is detected, the scaler first applies an existing
Auto Memory for the signal (if Auto Memory is enabled). If no entry exists, it performs an
automatic Auto-Image on the new signal. This sets a size and position for the image to fill
the screen, with respect to the current Aspect Ratio setting.
By default, the Auto-Image threshold is 25% brightness. Analog video signals greater
than the threshold are considered active video. To change the threshold value, use SIS
commands (see
Auto-Image threshold value
on page 33).
Aspect Ratio
— Press the Navigation buttons to set the aspect ratio setting of the active
input to Fill (default) or Follow. The scaler clears the previous size and position settings
whenever the aspect ratio setting for an input is adjusted.
When in Fill mode, all inputs automatically fill the entire output. For an adjustment to the
aspect ratio of a single input rate, use Image Size and Image Position under Picture Controls
(see
Picture Controls Submenu
on page 17). If auto memory is enabled, these settings
are saved and recalled the next time the signal is detected.
In Follow mode, each input rate is displayed with its native aspect ratio mode with the
correct letter box or pillar box settings visible.
Auto Memory
— Press the Navigation buttons to turn Auto Memory on or off for each
input. The scaler stores 32 auto memories per input, with input configuration and picture
control data for each video resolution. The default setting enables these memories to
automatically recall input and picture controls for previously applied signals. When auto
memories are disabled, the scaler treats every applied signal as a new source.
Auto Memory and Auto-Image Interaction
Auto Memory Auto-Image
Information
On
On
“New” signals and rates not previously detected by the
scaler are set up using default parameters, then Auto-Image
is automatically applied. The next time the signal is detected,
the values stored in the auto memory location are applied.
On (default)
Off (default)
“New” signals and rates not previously detected by the
scaler are set up using default parameters. If manual input
or picture settings are made, an auto memory location is
created and recalled each time the input is detected.
Off
On
Each change in input sync, input switch, or power cycle
triggers an automatic Auto-Image. When auto memory is
disabled, each change in sync is treated as a new signal.
Manual changes made to the image and picture controls are
lost each time a new rate is detected.
Off
Off
Each change in input sync causes default values to be
applied. Manual changes made to the image and picture
controls are lost when a new rate is applied, a new input is
applied, or after a power cycle.
Overscan
— Press the Navigation buttons to select the overscan value for each input
format. Choose between 0%, 2.5%, or 5%. Set default overscan mode through SIS
commands (see the
Overscan mode
SIS commands on page 43).
Overcan is specific to each input signal type. This feature zooms and crops SMPTE input
resolutions to mask edge effects and ancillary data that are common in broadcast signals.
When the overscan mode is not at 0%, an Auto-Image on a SMPTE input rate (NTSC, PAL,
SECAM, 480p, 576p, 720p, 1080i, 1080p, and 2K [2048x1080]) refers to the default input
lookup table values instead of performing a “true” auto image.
NOTE:
Overscan is valid only on SMPTE input rates (NTSC, PAL, 480p, 576p, 720p,
1080i, 1080p, or 2K [2048x1080]) and is global for each video format.
