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Background: Action-filled movies have larger volume differences between spoken
dialogs and loud scenes (for example during explosions), and because of this, their
dialogs are softer than in quieter films, which can be modulated higher.
Surround mix level/Center mix level: These settings lead to an additional damping of
the surround channels and the central channel. Both settings are preset to -3 dB.
LFE channel: Here you can switch off the LFE channel (Low Frequency Effect), for
example if you want to eliminate undesirable rumbling sounds in the low frequency
range. Normally you should leave this option activated.
LFE filter: The LFE filter is a low pass filter, which lets through only the lowest
frequencies. If you are dubbing a project in Samplitude/Sequoia, and have applied the
LFE filter, you can switch off this function here, since this filtering has already been
accomplished.
MPEG glossary
Motion estimation
Motion estimation is a further element for reducing data used in MPEG encoding.
Motion estimation also occurs in the B and P frames. The image difference that still
exist after prediction (view page 374) are examined. Complex algorithms are used to
search for an o
riginal occurrence of the macro block in the reference frame of each
macro block of the P or B frame (these are units of 2x2 blocks specially combined for
this purpose), which have been moved either by movement or by camera pan. They
can then be left out in the P and B frame. Only the information by how far and to
where the macro block has been moved is saved instead. This vector is called the
motion detector.
In the General encoder settings (view page 365), you can specify the quality of the
final MPEG vid
eo. This factor also influences the time required for encoding. The
longer it takes, the better the quality.