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NRS70 Series
SECTION 4
NRS70OPS
070803 Version 1 Issue 2
www.snellwilcox.com
4.15
NOISE REDUCE
This item allows Recursive noise reduction with
automatic threshold to be applied to the Luminance
and Chrominance channels.
A momentary push of this button will toggle the
Noise Reducer function ON or OFF.
Holding down this button will reveal a menu that
allows various forms of noise reduction to be
applied to the signal.
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Features…
Features
Enhance...
Noise Reduce...
RGB Legaiser
◀
Noise Reduce…
Noise Reduce
Noise Reduce
Recursive Level...
Recursive Threshold
Sparkle Filter
Median Filter
Split Screen..
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Noise Reduce
Selecting this item will enable the noise reduction
function.
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Recursive Level
or
LEVEL
This item allows Recursive noise reduction to be
applied to the luminance and chrominance
channels.
Recursive Level
C Off
C Low
C Medium
C High
Y Off
Y Low
Y Medium
Y High
The range of adjustment is off, low, medium and
high. Defaults settings are C Medium and
Y Medium.
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Recursive Threshold
or
THRESHOLD
This sets the noise reduction threshold of the
recursive filters.
Recursive Threshold
5
Preset
Recursive Threshold
The range of adjustment is from Auto (0) to 7 units.
Preset is to Auto (0).
Note that applying a high threshold level may
assist with extremely noisy images; however this
may result in plain areas appearing flat.
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Sparkle Filter
This item allows a sparkle filter to be applied to the
signal, reducing the effect of sparkle noise
associated with edge-of-reception signals from
satellite feeds, impulse noise or drop-outs from
tape-recorded signals.
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Median Filter
Note that this function is only active when the
Sparkle filter is enabled.
When selected, sparkle concealment is enabled
that employs a threshold controlled 3-dimensional
median filter. This permits the removal of picture
disturbances that the normal sparkle detection
algorithm may miss. For example low-level
sparkles will be concealed. The Median filter is
particularly effective on very noisy sources. Note
that some loss of resolution may be observed
depending on the source material.