(1) HD and SD
1080p (Full HD), 1080i, 720p can be called HD, and 480p is SD (equivalent to DVD).
(2) Resolution
The resolution corresponding to 1080i is 1920*1080i
The resolution corresponding to 1080P is 1920*1080P.
The resolution corresponding to 720P is 1280*720.
The resolution corresponding to 480P is 720*480
The resolution corresponding to 360P is 640*360
Note: 1080i is interlaced, 1080p is progressive, 1080p images are finer, smoother and better. The progressive scan image is less flickering (theoretically) and is difficult for the human eye to distinguish.
