| Aldro said: Just a question, |
1080i is interlaced, meaning when the horizontal resolution lines are scanned, they are only generated in alternate rows per refresh cycle.
In short, it's half the resolution of 1080p being generated per refresh cycle in alternate rows (odd then even) and interpolated into a full picture on a non-CRT display that doesn't "paint" scanned lines of resolution to generate a picture.
1080p is progressive scan, meaning odd and even scan lines are generated simultaneously for a full 1080 lines of resolution per refresh cycle.
1080i is typically the way that 1280x720 or 1366x768 display a 1080p signal depending on the display. Some will simply downscale it to 1280x720.
Visually, as 1080i only has half the image data as 1080p, the picture will not look pixel for pixel sharp as a native 1080p signal displayed on a native 1920x1080 display. It's most noticeable for text or any high contrast type images.
Essentially, you're losing visual data from a 1080p source by downscaling it.







