Comments on: A Simple Explanation of Something Really “Deep”

By: Pravin

Pravin — Thu, 24 Jan 2008 16:34:01 +0000

If you were using a CRT display, then 1080i would consist of two alternating sets of 540 scan lines per frame. 720p is a full 720 scan lines per frame. Most people are using plasma or LCD for their HDTV display, and on these technologies, there is no sense of “interlace” as there was on CRTs. The TV will combine both fields of 1080i data and display a full 1080 picture because it has no concept of showing only the odd or even scan lines. Broadcast TV is 1080i at most, like for the late-night talk shows and sports, and if you’ve been happy with the picture quality there, then perhaps you’ll understand that 1080i/p are not the big deal it’s made out to be — on plasma and LCD displays. It’s more of a marketing idea to get you to buy the device with the higher number on it.

By: lostcause

lostcause — Thu, 24 Jan 2008 13:59:24 +0000

it goes 1080i 720p 1080p no?

By: hd_masta

hd_masta — Wed, 22 Aug 2007 00:48:51 +0000

kerrang – you should do some research. 480p is not HD.

By: Ralph M.

Ralph M. — Tue, 21 Aug 2007 20:33:15 +0000

Actually, 480p is Enhanced definition digital TV, not HD.
The lowest resolution considered HD is 720p.

By: Pravin

Pravin — Mon, 20 Aug 2007 20:45:41 +0000

I did call it a “simple” explanation…

PCs can do a lot more things with their video than is done on HDTVs.

The topic of this piece was bit depth and color, not refresh rates.

By: kerrang

kerrang — Mon, 20 Aug 2007 20:27:32 +0000

Well, actually ANY resolution a PC puts out is “HD”

640×480 is exactly the same resolution as 480p, which is the most common broadcast television HD standard, and is also what line-doubled (progressive-scan) DVD resolves to after scan conversion in the player.

widescreen is not a prerequisite qualification for “HD”.. anything above 31.5khz = HD. and 31.5khz = 640×480.

The only resolution that is not HD is 15.7khz, or standard-definition television, which has an effective resolution of 320×240.
I guess if they want to understand what they want to brag about, they should look to another website?