HDTV stands for high-definition television.

HDTV is a class of digital television that provides a very high-resolution picture with Dolby digital surround sound. The higher resolution picture, displaying up to 10 times more image detail than standard TV, is the primary selling point for HDTV. HD signals also display in 16:9 aspect ratio as opposed to the standard 4:3 (a loss of up to 55% of the frame on movies filmed for the big screen), this allows viewers to see the whole screen.