HD_Videos

High-definition television (HDTV) is video that has resolution substantially higher than that of traditional television systems (standard-definition television). HDTV has one or two million pixels per frame, roughly five times that of SD (1280 x 720 = 921,600 for 720p, or 1920 x 1080 = 2,073,600 for 1080p). Early HDTV broadcasting used analog techniques, but today HDTV is digitally broadcast using video compression.