In theory 1080p resolution offers better picture quality than 1080i (read on to find out why), but in practice, it is virtually impossible for an average customer to tell the difference.

Comparison chart

1080i versus 1080p comparison chart
Edit this comparison chart1080i1080p
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Screen Resolution 1920x1080 (two million pixels when multiplied) 1920x1080 (two million pixels when multiplied)
Display Technology Interlaced (that's what the "i" stands for) Progressive (that's what the "p" stands for)
HDTV Usage 1080i is the most commonly used HDTV format, and has been adopted by most television broadcast, cable, and satellite outlets as their HDTV broadcast standard. The FCC includes 1080p in its definition of high-definition (HD) quality video. Less widely used HDTV format, but becoming more common.

1080i - Interlaced Display

1080i represents 1,080 lines of resolution scanned in alternate fields consisting of 540 lines each. 1080i is the most commonly used HDTV format, and has been adopted by most television broadcast, cable, and satellite outlets as their HDTV broadcast standard.

However, since 1080p is not officially part of the FCC's approved HDTV broadcast standards, it is displayed either as a result of video upscaling through a specially modified DVD player, video scaler, or a Blu-ray Disc Player, in combination with a 1080p input capable video display device (such as a Television or Video Projector) OR by on-board video processing within the Display device itself than can upscale all input sources to 1080p.

1080p - Progressive Display

1080p represents 1,080 lines of resolution scanned sequentially. In other words, all lines are scanned in progressively, providing the most detailed high definition video image that is currently available to consumers.

Differences Within 1080p

1080p can also be displayed (depending on the video processing used) as a 1080p/60 (most common), 1080p/30, or in 1080p/24 formats.

References

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