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What do the Image Processing options do to the Video signal?

Views: 1282
Votes: 0
Posted: 01 Feb, 2008
by: Admin A.
Updated: 01 Feb, 2008
by: Admin A.
Under the Source option tab (ver 2.4.7z) or in the Preset area (MediaPress X) are
a variety of Image Processing options. Not all are available for every input
source, depending on specifics of the filters. Care should be used on these
settings as you can make a good image appear pretty poor. But you can also make a
pretty bad image look very good if setup correctly. Experimentation is the key
here. Use the realtime preview to see realtime results of these options.

Low Pass Filter applies a simple filter to the signal in the encoding engine. It
eliminates high-frequency content that can interfere with encoding.  (This does
not exist in MediaPress X).

Noise Reduction uses frame differentiating techniques to pick out background
noise from a video signal. It then subtracts this noise from the signal resulting
in a cleaner image.

Smoothing is similar to the Low Pass Filter, but is located in the analog input
section of the board. It is a variable Low Pass Filter that eliminates high
frequency content before encoding. This makes for a better looking image when
encoding to a low datarate or from a poor source.

Sharpening is a analog peaking filter that boosts up the edges of the input
signal to bring out details in the image. It can actually increase the amount of
MPEG artifacts because it increases the amount of high-frequency content that the
encoder must compress. It can also bring out hidden details on blurred images.

Document: 10233
Created: 5/21/03
Modified: 8/5/04
Product: MediaPress
Version: 2.4.7z, MediaPress X 1.x
Mac OS: 9.x, 10.x
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