ViewCast Osprey PCI, Руководство пользователя

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Osprey PCI User Guide
ViewCast 43
nearly the entire screen is considered in motion. The recommended default
is 16.
Smooth and Sharp
Motion When the Smooth Motion radio button is selected, there will be more loss
of detail in motion areas, but edges will be smoother. Since the eye does
not see detail clearly in areas of motion anyway – whereas edge artifacts
are always highly intrusive – the Smooth algorithm should be preferred for
most applications. The Smooth algorithm uses a bit more CPU.
When the Sharp Motion radio button is selected, detail in motion areas will
be sharper, but at the expense of somewhat jagged diagonal edges.
Both algorithms treat still areas (areas that are not green in Test Mode) the
same way, and there should be no loss of detail in still areas.
Test Mode When the Test Mode box is checked, the motion adaptive algorithm enters
a test mode that displays motion pixels as bright green dots. The dots will
mainly be along edges that are in motion, but if the motion threshold is set
too high there may also be a random distribution of green dots caused by
pixel jitter and instability of the video signal. The extensiveness of the green
areas will vary according to the settings of the other adjust controls. Test
mode is always automatically exited when you exit the Adjust dialog.
In Test Mode, with the Sharp algorithm green speckles will be on alternate
lines only, and with the Smooth algorithm they will be on all lines.
Restore Defaults Click this button to restore the default settings.
Help Click Help to access the user guide.
Close Click Close to close the window.
Notes: If your video format results in exact 2:1 or 4:1 vertical scaling for a particular pin, then all
the video will come from one field. This will be the case for uncropped NTSC CIF (320 x 240) or
QCIF (160 x 120). It may be the case for special cases of cropped video as well.
In the PostProcessing sequence as currently implemented, the “sharp” motion adaptive
deinterlacing algorithm has no effect on single-field streams, since it alters only the field that these
streams do not use. The “smooth” algorithm operates on both fields and may have a detectable
blurring effect on areas of motion. (“Sharp and “smooth” are set in the Adjusts sub dialog.)
Inverse telecine if enabled does not affect the individual fields for a one-field pin; however, if the
pin’s frame rate is 24, the driver will detect and remove the frames that are repeats. If you are
streaming multiple pins, and the exact single-field special scaling case holds true for one pin but
not another, different processing will be applied to the two pins.
When Auto mode is selected, some kinds of content will cause the driver to frequently switch
between Inverse Telecine and Motion Adaptive processing. Content such as title sequences and
commercials are often telecine, but cuts between scenes generally break the telecine sequence,
forcing the driver to resynchronize. It takes it a number of frames to lock on to the new sequence.
The driver will drop back to the Motion Adaptive algorithm as soon as it becomes aware that
telecine sync has been lost. However, it may take it several frames to discover that this has
happened; these frames will not be correctly deinterlaced.