HDTV technology was introduced in the United States in the 1990s by the Digital HDTV Grand Alliance, a group of television companies and MIT.  HDTV is a digital TV broadcasting format where the broadcast transmits widescreen pictures with more detail and quality than found in a standard analog television, or other digital television formats.  HDTV has the same screen resolution and refresh rate throughout the world. Such tv offers a picture free of “ghosts,” “snow” or interference. 

HDTVs are bigger and sharper than older standard-definition TVs, so they show off more of the flaws and relative softness of SD channels and content.  It is the entrance to an awesome, new dimension; and an almost unbelievable, new experience; both visually and auditory.