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13. Input Source File Service
Option Item Explanation
Clamp Delay The time between the leading edge of the clamp pulse and the locked edge of the synchro pulse. Can
be any value between 0 and 255. Change the value by pushing the curser key ↑ or ↓. (image 13-2)
Clamp Width The width of the clamp pulse can be any value between 0 and 255. Change the value by pushing
the curser key ↑ or ↓. image 13-2)
Field Polarity The field polarity function is used for interlaced images. Both rasters of the image could be shifted in
a wrong way (double lines are visible in the image). This can be corrected by forcing the field polarity
to Neg. or Pos. Use the ENTER key to toggle between Pos. and Neg.
Field Select Default setting = [Both]
The field select is only used for interlaced images. One frame of an interlaced image contains two
fields, an even and an odd field. The choice exists to project [both] fields on the screen or only the
[even] or [odd] field. This can be useful for 3D projection. Use the ENTER key to toggle between
Both, Even and Odd.
Vertical Refresh The way of updating the image information on the display panels. This item is not available for
Pal-NTSC-Secam sources, and for that reason displayed in gray.
– For sources with a vertical frequency up to 60 Hz: the vertical refresh rate is the same as the
vertical frequency of the source. This is a necessity to project moving images without ’motion
artifacts’. For stationary images with a vertical frequency up to 60 Hz, it is still possible to use
asynchronous refresh. When loading Pal, Secam or NTSC-files, the synchronous mode is default,
for all other sources below 60 Hz, asynchronous mode is default.
- For sources with a vertical frequency higher than 60 Hz: the vertical refr
esh is different than the
vertical frequency of the source. Synchronous refresh cannot be used.
Vertical Synchro
Polarity
The vertical refresh can be synchronized with the leading or trailing sync edge. Default setting is
[Leading]. Toggling to [Trailing] is only necessary for special applications where the trailing edge
of the synchro signal has to be taken as a reference. Use the ENTER key to toggle between
Leading and Trailing.
Film mode detection:
[On] or [Off]
Detects in the [on] mode if the source is film or video. Use the ENTER key to toggle between [on]
or [off]
When enabled, the hardware looks for telltale signs of 3:2 or 2:2 pull-down sequences. These
are the result of converting cinema material recorded at 24 frames-per-second to the television
frequencies of 60 or 50 interlaced fields per second respectively. When FILM conversion is detected,
the original 24 frames-per-second are restored. This avoids de-interlacing artefacts, and results in a
perfect artefact-free display. Note that in some cases (video clips, scrolling news stickers,...) FILM
and VIDEO material are mixed on one screen. This may confuse the detector and cause it to go
into FILM restoration mode. This will cause "jaggies" or motion artefacts. In such cases, disabling
FILM mode processing is the best cure.
Banner Protect: [On]
or [Off]
Only active when film mode detection is in the on position. Use the ENTER key to toggle between
[on] or [off].
FILM mode processing normally processes the entire display, but this may cause problems on
sources where video and FILM content are mixed. One very common example is scrolling banners at
the bottom of the screen (e.g. financial news). For those cases, the "banner protect" feature will force
the bottom quarter of the screen to be always processed in VIDEO mode, regardless of the rest of
the screen, which may be either video or FILM mode.
54 R5976519 ACSAR 12122002