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HD5050
SECTION 4
HD5050070999 Version 1 Issue 4
For Software Version Z5 onwards
4.6
m
CONVERT
Mode
Different conversion modes may be set with this
function.
Temporal Mode
The temporal mode may be set to:
Auto
This mode selects synchronise
mode when the input and output
field rates are the same and
optimise mode when they are
different.
Optimise
In this mode the unit operates as
in synchronise mode but monitors
the amount of slippage between
the input and output timing. When
the slippage exceeds a preset
value the unit performs an
interpolation to move to the next
available minimum blur temporal
position. The effect of this is to
give the same high performance
as the synchronise mode but
without periodically discarding a
field; for example, in 59.94 to 60Hz
mode only about half a second of
interpolation occurs in every 16
seconds. However, because of the
system used, the video delay
through the machine can vary by
up to plus or minus half a field.
Interpolate
In this mode the output is always
interpolated from the input.
This will give the smoothest output
but at the expense of potential
blurring of moving objects.
Synchronise
Synchronise mode gives the
highest performance with minimum
output blurring. If the input and
output field rates are not identical it
can cause field drops or repeats
which may have the effect of
causing moving objects to judder.
Filter
Three filters may be applied to the signal with this
function.
Normal
Use for normal non-converted
input video material
Up-Down
Use for input video material that
has been previously
down-converted
Single
Selecting this mode makes the
HD5050 use a single field
aperture. This is useful if the prime
requirement is to up-convert
incoming 3:2 film material without
modifying the 3:2 sequence.
Note: The filter type setting only
has an effect if the HD5050 is in
Video->Video mode or
Video -> 2:2 mode (see below).
If other frame based processing
modes are selected this setting is
over-ridden by the frame based
mode selected.