Why 720x480 which is a 1.5 aspect ratio. I thought it was always 1.33 or 1.77, why this middle aspect ratio? I've been getting confused lately, I thought for a while that all DVDs are released as 720x480 and scaled from there. Now that I really think about it, it doesn't make to much sense to me. I know 640x480 is a normal 4:3 resolution but I never really hear that number unless it has to do with computers. Ugh I'm confused, the dvd wiki isnt helping me out.