HD is an abbreviation of “High Definition. ” “HD movie” generally refers to movies with a resolution of at least 1,280 × 720 pixels. HD movies are categorized by their vertical (V) pixel count and whether playback is progressive or interlaced. A “720p” movie offers progressive playback with a frame size of 1,280 × 720. Full HD (available with the Q8025) is 1080i, or in other words interlaced playback with a frame size of 1,920×1,080 pixels.