VIDEONICS DIGITAL VIDEO MIXER PAGE 75
caused when an object is in a different position in the two captured fields or
when an object is so small it appears in only one field. The Mixer’s field freeze
eliminates flashing artifacts but re-
duces vertical resolution since it only
shows one field.
Upside-Down Video
When video is flipped upside
down (as it is for some transition ef-
fects or if you use the vertical flip
option on the Input Effects screen),
the picture resolution is reduced
slightly and the frame rate is reduced
to make the video image more stable.
The reduction is subtle with most
video and most effects, especially
those that move quickly.
Video Processing Arti-
facts
Video processing circuits such as
enhancers, sharpness controls, and
the playback circuitry used in some
VCRs, can over-process the video
causing the visible signal to interfere
with the invisible sync portion of the
signal, making the signal non-stan-
dard. This may cause video lines to
shift to the right, black lines to enter
the picture area from the left edge of
the screen, white flashes, video “tear-
ing,” or a shredded picture.
Normal Picture
Picture with Video Tearing
The best solution is to reduce or
remove the processing, bringing the
signal back to normal. VCRs and
camcorders often have controls that
can disable extra processing. If your
VCR or camcorder has a SHARPNESS
control, set it to zero or off. If there is
an EDIT switch turn it ON.
If the processing cannot be dis-
abled, you can compensate using the
MX-1’s special “filter settings.” The
Advanced Setup section of Chapter
5, “Setup Screen,” describes this.
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