Up-conversion in a nutshell
Here is a basic idea of what up-conversion does.
A DVD stores video images at 480p resolution, which simply means each image on your screen is made up 480 lines of color, packed very closely together. This is "Standard Definition" or SD. <div>
A Blu-Ray stores data in "High-Definition" or HD, which is where each image on the same screen is made up of 1080 lines of color (720 lines is another standard, but is also considered HD), so obviously you can fit a lot more detail in to the picture thanks to all those extra lines.
When you play a DVD on an up-converting player, the player looks at the 480 image on the DVD and inserts its own extra lines to make it look HD. To do this it simply insert lines so that, for example, where on the original DVD you had line 1, then line 2 then line 3, with up-conversion you have line 1, a gap, line 2, a gap line 3 a gap etc..
The up-converting player then creates it's own gap lines. It looks at what color is in line 1 and line 2, and puts a color about halfway between them in the gap, then the same in the next gap by looking at line 2 and line 3 and so on.
So you are not actually getting true High Definition because the extra lines are really just "best guesses" of what should be shown, but they can make your DVD look better.
Hope this helps.
Was this reply helpful? (4) (0)