HD display 720p HD What is HD? The difference between 720p, 1080i and 1080p HD 720 P 720p HD a standard 720p HDTV high definition music videos 720p HD high-definition high-definition high-definition video recording in the high-definition format 720p HD What is HD? The difference between 720p, 1080i and 1080p high definition 1080p display HD resolution technically HD