ADS Technologies USBAV-708 INSTANT VIDEOMPX, User Manual

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The
Guide
53
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Slow performance/quality mode enables the
performance-optimized
Rate-Distortion
algorithm, designed to dramatically improve
video quality at low bitrates while
avoiding the performance hit incurred by
the fully quality-orientated rate distortion
algorithm.
The Rate-Distortion algorithm attempts to best balance bit spend against quality
gain by intelligently evaluating all of the possible outcomes of various decisions
made by the encoder.
QUICK GUIDE
Slow
In Slow mode the encoder uses the new Rate-Distortion algorithm to make
frame type decisions based upon the best balance of bit spend and quality
gain. Because of this the
Scene Change Threshold settings become
redundant and is ignored.
MV re-use is not permitted under Slow mode.
QPel is unsupported in Slow mode. If you have enabled both QPel and Slow
mode the performance/quality mode will automatically default to Standard
mode when encoding begins.
Performance/Quality:
-pq <mode>
Mode is one of:
1 Fastest
5 Standard
64 Slow
192 Slowest