Operation Manual

Appendix
110
NTSC and PAL
The NTSC (National Television Systems Committee) and PAL (Phase Alternating
Line) are television standards used for commercial television broadcasting around
the world. Both NTSC and PAL use interlaced content at 30 frames per second (i.e.
60 fields) and 25 frames per second (i.e. 50 fields) respectively.
Because fields in interlaced signals are independent of other fields within a given
frame, problems arise when two fields containing different imagery data are
interleaved for display on non-interlaced computer monitors. When video imagery
with superfluous movement is displayed, it usually causes motion artifacts (visual
imperfections) and is why deinterlacing in bob mode with PowerDVD XP is needed.
DVD titles whose content originates directly from films produced from Hollywood
studios (24 frames/second) won't possess motion artifacts.