ADS Technologies USBAV-708 INSTANT VIDEOMPX, User Manual

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The
Guide
79
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Quarter-pixel increases the resolution of the
motion search to one quarter of one pixel,
double that of the default half-pixel resolution.
Quarter-pixel resolution motion vectors reduce the error
in the motion-compensated frame but increase the
search time, leading to longer encoding durations.
Quarter-pixel can be enabled from the second step of
the
Select Profile Wizard dialogue under MPEG4 Tools
only when Disable profiles has
been selected during the first
step.
QUICK GUIDE
Quarter-pixel
Quarter-pixel motion search resolution can substantially increase encoding
duration.
Support for Quarter-pixel decoding is not required by any DivX Certified
device. If you encode your video using quarter-pixel you may be unable to
play it using DivX Certified devices.
Quarter-pixel motion search resolution is not supported by the Rate-Distortion
algorithm as used by the
Slow and Slowest Performance/Quality modes. If
you enable Quarter-pixel in combination with these modes the encoder will
default to
Standard Performance/Quality mode automatically .