What You Need To Know About 1080i And 1080p

Being high-definition formats, 1080i and 1080p are commonly used when describing HDTVs and Blu-ray Disc Players

. Understanding between them can get a little confusing. 1080i and 1080p both produce a video signal of a 1920x1080 pixel resolution - 1920 pixels going across your TV screen and 1080 pixels going down your television screen. (Pixels are tiny dots which make up the picture on your screen) The difference between them is in how the 1080i and 1080p video signal is seen on your television screen.

With the 1080i HD format the video for individual frames are displayed in alternative fields. The field consists of 540 lines of pixels going from the top to the bottom of your television screen. First displayed are the odd fields, then the even fields are displayed. Once combined they create, every 30th of a second, one solid full frame consisting of all 1080 pixel lines.

With the 1080p high-definition format the video is transferred progressively. What this does is display both the odd and even fields that make up the 1080 pixel lines or one full frame, simultaneously. The resulting image is significantly clearer and sharper looking than the 1080i image. It has far less motion artifacts or jagged edges.

More on 1080p and Your HDTV:

Depending on the processing of the video signal, 1080p resolution can be display in a few ways. They are 1080p/60, 1080p/30, or 1080p/24 formats. 1080p/60 is the most common format and most HDTVs can handle this format. Here the 1080p signal is sent and shown at a rate of 60 fps (Frames-per-second).

1080p/30 format displays the signal at a rate of 30fps.

But once Blu-ray DVD Players came along, a new format, 1080p/24 was implemented and embraced by the movie industry. Here the 1080p signal is sent every 24fps. It your HDTV does not have the capability to process 1080p/24fps, the Blu-ray DVD Player can also output 720p, 1080i and 1080p/60fps signals.

Knowing the differences between 1080i and the different formats of 1080p can help to clear up any confusion. But the real analysis is in your viewing on your own HDTV. On smaller screen HDTVs, the difference between 1080i and 1080p is very hard to see. But any HDTV over 40 inches and you will clearly see the difference between them. And there are other factors as well, like the video processing done by a Blu-ray Disc Player. Some Blu-ray DVD Players can produce a better picture than others. Your best bet is to rely on your own judgment and own eyes, and you will spoon be enjoying all the benefits that HD can bring.

by: Curtis Hoskins

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