What are the advantages of High Definition Television?
The first noticeable difference of high definition TV from the analog television system is that the screen is much wider. With analog TV, the width of the picture is divided by the height of the picture and will always produce a 4/3 ratio. High definition television, on the other hand, has a width to height ratio of 16/9, which closely approximates that of a movie screen. The second advantage is that HD has over six times the sharpness and clarity of analog TV. The HDTV picture contains 1080 vertical picture elements (pixels) by 1920 horizontal pixels for a total of over 2.0 million pixels. The current standard definition picture contains only 480 vertical pixels by 720 pixels for a total of 345,600 pixels. Third, the color resolution of HDTV is also more than twice the resolution of analog. High definition television also has six channels of CD-quality surround sound (left, right, center, left rear, right rear, and low frequency effects).
