Barco RS976986/08 Crib Toy User Manual


 
9. Image menu
Image 9-74
9.5.3 Advanced settings, lm mode detection
About lm mode detection
This mode detects whether lm or video is displayed.
When enabled, the hardware looks for tell-tale 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 elds per second respectively. When
FILM conversion is detected, the original 24 frames-per-second are restored. This avoids deinterlacing artefacts, and results in a
perfect artefact-free display. Note that in some cases (video clips, scrolling newstickers,...) 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.
Film mode detection is only for interlaced sources.
3:2 pull-down
Method used to map the 24 fps of lm onto the 30 fps (60 elds) or 25 fps (50 elds), so that one lm frame occupies
three video elds, the next two, etc. It means the two elds of every other video frame come from different lm 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 ve video frames and four lm frames, the latter identied as A-D. Only lm 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 lm format into video by repeating each frame (used for PAL DVD’s) as two
video elds. ( AD )
Artefacts
Undesirable elements or defects in a video picture. These may occur naturally in the video process and must be
eliminated in order to achieve a high-quality picture. Most common in analog are cross color and cross luminance.
Most common in digital are macroblocks, which resemble pixelation of the video image.
How to set up
1. Press MENU to activate the menus.
2. Use the or key to select Image and press ENTER.
3. Use the or key to select Advanced settings and press ENTER.
The Advanced settings menu is displayed.
4. Use the or key to select Film mode and press ENTER to toggle between [auto] or [off].
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R5976986 FLM HD18 15/03/2010