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Why is the resolution important?
The more lines of resolution, the more crystal clear the image provides. In turn, we get more vibrant colors and picture contrast. The regular DVD can not store all that information on one disc. That’s where the HD-DVD can store 3 times more information. Here are some terms that will help you understand resolution.
1080p
This produces a resolution of 1080 lines of progressive video. Progressive video meaning it truly shows 1080 lines per frame. This is where the future of high definition wants to be.
1080i
This produces a resolution of 1080 lines of interlaced video or 540 lines per field. Interlaced video means that every other line is filled with resolution. 1081i delivers a half of a frame every 1/60th of second, while 1080P can delivery a full frame.
720p
This produces a resolution of 720 lines of progressive video. Progressive video means it show 720 lines per frame.
480p
This produces a resolution of 480 lines of progressive video. Progressive video means it shows 480 lines per frame. Standard DVD uses 480i or 480p. That gives you an idea of what the current standard is.
480i
This produces a resolution of 480 lines of interlaced video or 240 lines per field. Interlaced video means that every other line is filled with resolution, therefore the 240 lines per field. 480i delivers half of a frame every 1/60th of a second, while 480p can deliver a full 480 lines in a full frame.
Extra frame information
Sometime you see terms like 720p60 or 480p30. The extra numbers represent frames per second. 720p60 means 720 progressive lines at 60 frames per second. 480p30 means 480 progressive lines at 30 frames per second.