archbrix on 11 May 2014
You're welcome. 
http://hometheater.about.com/od/hometheatervideobasics/qt/The-Difference-Between-720p-And-1080i.htm
720p: "the entire image (720 lines or pixel rows) is sent every 60th of a second (or twice every 30th of a second)."
1080i: "1080i, since it is interlaced, only sends 540 lines (or half the detail) every 60th of a second, with all the detail sent every 30th of a second. On the surface, 1080i produces more detail than 720p, but since the increased detail is only sent every 1/30th of a second, rather than 1/60 of a second, fast moving objects, will exhibit slight interlacing artifacts - which can appear to look like jagged edges or a very slight blurred effect."
