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CVR250
SECTION 4
CVR250OPS
20/10/06
www.snellwilcox.com
Version 1 Issue 4
4.27
Noise Reduction
This screen allows various forms of noise
reduction to be applied to the signal.
Noise Reduction
Noise Reduction Enable
When enabled the noise reduction system will be
active. Default is to Off.
Y Noise Reduction
This item allows Recursive noise reduction to be
applied to the luminance channel.
The range of adjustment is off, low, medium and
high. Default is to Medium.
C Noise Reduction
This item allows Recursive noise reduction to be
applied to the chrominance channel.
The range of adjustment is off, low, medium and
high. Default is to Medium.
Recursive Threshold
This control sets the noise reduction threshold of
the recursive filters.
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.
Filters
Sparkle
Enabling this item applies a sparkle filter 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.
Median
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.
Split Screen
This function allows the effects of noise reduction
to be easily seen by splitting the screen in half.
One half will show the picture with noise reduction
and the other half without noise reduction.
Off
This disables the split screen function.
Left-Right
When enabled, the screen will be split into two
equal sections separated by a vertical white line.
The processed picture will occupy the left hand
section of the screen and the unprocessed picture
will occupy the right hand side section.
Top-Bottom
When enabled, the screen will be split into two
equal sections separated by a horizontal white line.
The processed picture will occupy the bottom
section of the screen and the unprocessed picture
will occupy the top section.