What is HD?
High Definition Television is more commonly known as HD or HDTV and is a new standard combining both high-resolution pictures and Dolby Digital Surround Sound to give fantastical televison experiences. The picture quality of HD is clear, sharp and intensely colorful.
HD has 3 different resolutions, 720p, 1080i and 1080p
720p
Giving a pixel resolution of 1280x720, this is the lower end of HD compatible resolutions and now rarely seen.
1080i
Giving a pixel resolution of 1980x1080, this is an interlaced format making it less superior to 1080p.
1080p
1080p has the same pixel resolution as 1080i, however, 1080p uses progressive scan which gives a much smoother image.
