Originally Posted by Denon_Kid
if i'm not mistaken, 1080p/720p/576p/480p (or i, whatever) are all "horizontal" scan resolutions
, they measure the vertical lines from left-to-right (or vice-versa).
You are mistaken.
1080i, 720p, 480p, etc, measure the vertical
resolution. The number of horizontal lines from top to bottom. Since 1080i is a 16:9 mode, that means that to fully display it you need a 1920x1080 pixel display; to fully display 720p you need 1280x720 pixels.
so, a native 720p on a screen that has native 1024x768 should be viewed with blocking on either side. when a panel that supports 1080 receives anything less the panel gives the user opions, such as "normal", "full", "justify", or "zoom".
No. The display we are talking about (Panasonic TH-42PX50U) is a 1024x768 display with a 16:9 screen aspect ratio. Even though 1024x768 is a 4:3 ratio in terms of number of columns to rows, the pixels themselves are wider than they are tall, so that the overall screen dimensions maintain a 16:9 aspect ratio.
720p on a screen that has a native resolution of 1024x768 will simply be scaled to that display size - stretched to 768 rows and scaled to 1024 columns. Likewise, 1080p content will be scaled down to 768 rows and 1024 columns.
The reason the PC magazine article claims (with some justification) that the Panasonic is not a "true HD resolution" set, is that to truly display all of the information in a 720p signal, you need a display with 1280 columns and 720 rows. The Panasonic only has 1024 columns, even though it has 768 rows, so it necessarily loses some information when it scales the image. It obviously loses even more information when it scales a 1080i image.