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Option Item
Vertical Synchro
Polarity
Film mode detection:
[On] or [Off]
Banner Protect: [On]
or [Off]
Image 16-4
Video pixels
A
Video Signal
B
Image
C
Total Pixels
D
Start Pixels
E
Active Pixels
3:2 pull-down
Method used to map the 24 fps of film onto the 30 fps (60 fields) or 25 fps (50 fields), so that one film frame occupies
three video fields, the next two, etc. It means the two fields of every other video frame come from different film frames
making operations such as rotoscoping impossible, and requiring care in editing. Some sophisticated equipment can
unravel the 3:2 sequence to allow frame-by-frame treatment and subsequently re-compose 3:2. The 3:2 sequence
repeats every five video frames and four film frames, the latter identified as A-D. Only film frame A is fully on a video
frame and so exists at one time code only, making it the editable point of the video sequence.
2:2 pull-down
The process of transferring 24-frames/sec film format into video by repeating each frame (used for PAL DVD's) as two
video fields. ( AD )
R5976468 CINE VERSUM SYSTEM 03112003
Explanation
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.
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.
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.
Image 16-5
Video clamping
A
Clamp signal
B
Leading edge sync signal
C
Trailing edge sync signal
D
Clamp pulse delay
E
Clamp pulse width
16. Input Source File Service
101
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