Apple Cinema Tools 3 - Manual (Page 221)

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Glossar
y Glossary
2:3:2:3 pull-down A pull-down method that is the same as the 3:2 pull-down, except
that it is applied by a digital video camcorder (as opposed to any other type of
equipment that could apply the same pattern of pull-down). This manual uses the term
“2:3:2:3” when referring to the pull-down that comes from a 24P digital video
camcorder; this type of pull-down can be removed using the automated form of
reverse telecine. See also 3:2 pull-down.
2:3:3:2 pull-down A method of distributing film’s 24 fps among NTSC video’s 30 fps
when film or 24P video is transferred to NTSC video. In the transfer, the recording
alternates two fields of one frame and then three fields of the next two frames,
followed by two fields of the next frame. In this way, the 24 frames in one second of
film or 24P video fill up the 30 frames in one second of video. While 3:2 is the
conventionally supported pull-down pattern for NTSC devices, some digital cameras
and editing systems are beginning to support 2:3:3:2 pull-down.
24&1 A method of transferring film to PAL video, where two extra fields per second are
added to the video so the 24 frames in a second of film are all contained within the
25 frames per second of PAL video. This method maintains the original action speed.
See also 24@25.
24@25 The most common method of transferring film to PAL video, where the film is
sped up during the telecine transfer to 25 fps. This creates a one-to-one film-to-video
frame relationship, but speeds up the action by 4 percent. See also 24&1.
24P A high definition video format using a 24 fps rate and progressively scanned
video. It is finding wide use in film production due to its high quality and identical
frame rate. It also converts easily to most 30 fps and 25 fps standard and high
definition video formats.
3:2 pull-down A method of distributing film’s 24 fps among NTSC video’s 30 fps when
film or 24P video is transferred to NTSC video. In the transfer, the recording alternates
2 fields of one frame and then 3 fields of the next, so that the 24 frames in one second
of film or 24P video fill up the 30 frames in one second of video. Also known as
2:3 pull-down.
UP01101.Book Page 221 Thursday, March 10, 2005 3:16 PM