120HZ: This is covered
in more detail by clicking 120HZ but in a nutshell -
120HZ refer's to the refresh rate in a LCD HDTV. The
number of times per second in which the monitor "draws"
the data it is being given. A refresh rate that is too
low can cause flickering and will be more noticeable on
larger monitors. The industry is moving towards 120HZ and
if you are in the market to buy a LCD HDTV, you really
need to buy it with the 120HZ
designation.
1080P: 1080p is the
shorthand name for a category of display resolutions. The
number "1080" represents 1,080 lines of vertical
resolution (1080 horizontal scan lines), while the letter
"P" stands for progressive scan (meaning the image is not
interlaced). 1080p can be referred to as full HD or full
high definition to differentiate it from other HDTV video
modes. The term usually assumes a widescreen aspect ratio
of 16:9, implying a horizontal resolution of 1920 pixels.
This creates a frame resolution of 1920×1080, or
2,073,600 pixels in total.
1080i: Is similar in
many ways to 1080P, except the frames are interlaced.
1080P has a superior
picture and is the mode that most HDTV manufacturers are
moving to. We could have you fall asleep by going into
all the technical details but the bottom line is that you
need to purchase your 120HZ LCD HDTV with the ability of
1080p.