Telecined

Some articles on telecined:

Soft and Hard Telecine
... On DVDs, telecined material may be either hard telecined, or soft telecined ... In the hard-telecined case, video is stored on the DVD at the playback framerate (29.97 frame/s for NTSC, 25 frame/s for PAL), using the telecined frames as shown above ... In the soft-telecined case, the material is stored on the DVD at the film rate (24 or 23.976 frames/s) in the original progressive format, with special flags inserted into the MPEG-2 ...
576i - PAL Speed-up
... When telecined and played back at PAL's standard of 25 frames per second, films run 4% faster ... per second to the 30 fps frame rate, PAL speed-up results in the telecined video running 4% shorter than the original film as well as the equivalent NTSC telecined video ...