Digital TV Standard
Digital TV Standard refers to the way in which your television receives and displays signals:
EDTV (Enhanced Definition Television) - The picture quality of EDTV is superior to that of standard analog TV (480i) but not as good as HDTV (1080i or 720p). EDTV displays the picture at a resolution of 852x480 (480p) lines in either 4:3 or 16:9 aspect ratios and it includes Dolby Digital sound system.
HDTV (High Definition Television) - An improved television system which provides twice the vertical and horizontal resolution of existing television standards. It also provides audio quality approaching that of compact discs. It capables of displaying on a wider screen (16x9 as opposed to the conventional 4x3) and at higher resolution.
SDTV (Standard Definition Television) - The SDTV picture, having either in 4:3 or 16:9 aspect ratios, is better and of higher quality than the one of NTSC, however, it does not reach the quality and resolution of HDTV.