Question by diannarodgers@sbcglobal.net: What is the difference between a 1080i or 1080p LCD television? Which is the better quality?
We are shopping for LCD TV’s and wondered what the difference is between 1080i and 1080p quality?

Best answer:

Answer by Jave
1080p TVs to check out:

1. 1080p defined
1080p resolution–which equates to 1,920×1,080 pixels–is the latest HD Holy Grail. That’s because 1080p monitors are theoretically capable of displaying every pixel of the highest-resolution HD broadcasts. On paper, they should offer more than twice the resolution of today’s 1,280×720, or 720p, HDTVs, such as Samsung’s HL-P5085W. Some companies, such as LG, refer to these super-high-res of sets as ultra-HD, while others prefer to substitute true or full for ultra.

2. Why 1080p is theoretically better than 1080i
1080i, the former king of the HDTV hill, actually boasts an identical 1,920×1,080 resolution but conveys the images in an interlaced format (the i in 1080i). In a tube-based television, otherwise known as a CRT, 1080i sources get “painted” on the screen sequentially: the odd-numbered lines of resolution appear on your screen first, followed by the even-numbered lines–all within 1/30 of a second. Progressive-scan formats such as 480p, 720p, and 1080p convey all of the lines of resolution sequentially in a single pass, which makes for a smoother, cleaner image, especially with sports and other motion-intensive content. As opposed to tubes, microdisplays (DLP, LCoS, and LCD rear-projection) and other fixed-pixel TVs, including plasma and LCD flat-panel, are inherently progressive in nature, so when the incoming source is interlaced, as 1080i is, they convert it to progressive scan for display.

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