Display Resolutions, Aspect Ratio…

When you go shopping for a new display for your computer or for entertainment viewing, here are some things you’ll want to keep in mind.

The reference resolutions for each of the “standards” are:

  • SD (NTSC), 480i = 720×480
  • ED (NTSC), 480p = 720×40
  • HD, 720p = 1280×720
  • HD, 1080i = 1280×1080, 1440×1080, or 1920×1080
  • HD, 1080p = 1920×1080

However, the aspect rations commonly used are:

  • 4:3 (SDTV)
  • 16:9 (HDTV)
  • 1.33:1 (Academy Standard)
  • 1.78:1 (Academy Flat)
  • 2.35:1 (Anamorphic Scope prior to 1970)
  • 2.39:1 (Anamorphic Scope — Panavision/Cinemascope)

Both 1280×720 and 1920×1080 are 16:9 resolution… so if that’s what the material was originally shot in you’re fine; HOWEVER, it’s very uncommon to find any modern movie of note (or any “action” movie for the last 20+ years) that is 16:9.  The bottom line is you’re going to see black bars on the side or top and bottom when you watch “movies” most of the time — or you’re going to have your display stretch (distort) the image to fill the screen.

Originally posted 2008-12-16 12:00:47.