What’s the deal with: 120 Hz and “dejudder”?

All the rage of the newest LCD TVs is supporting a few things like “120 Hz” and “dejudder”. What are these?
When a TV is marked as “120 Hz”, it means it is capable of redrawing the screen 120 times a second. Traditional tube TVs in the US refreshed around 59.94 times per second, and other kinds of TVs typically fell into providing 60 or 75 Hz refresh rates. Since most video in the US is encoded at either 24 (film), 29.97 (television), or 30 (VHS) frames of video per second, these refresh rates were more than sufficient …read more