Analog - It is the traditional display type that uses the NTSC system. Analog televisions have an almost square screen (4:3 aspect ratio) and are unable to display HDTV signals.

HDTV (High Definition) - is the highest quality of digital television available. These televisions can display high definition signals (1080i, 720p, etc.) that result in images that are many times clearer and more detailed than those from analog televisions.

EDTV (Enhanced Definition) - provides lower image quality than HDTV, but still higher quality than a standard digital (SDTV) signal. These televisions can display enhanced definition signals (at least 480p).

SDTV (Standard Definition) - has built-in digital receivers/decoders and do not require the purchase of any separate components in order to display digital signals. It provides lower image quality than EDTV or HDTV, but higher image quality than analog TV. SDTV is displayed using an aspect ratio of 4:3.