Thread: 1080i vs 1080p
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Old 12-24-2007, 07:21 PM   #1
ericschand
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Join Date: May 2005
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Default 1080i vs 1080p

Starting a different thread:

Re: $99 DVD player from Toshiba this Boxing Day

Quote:
Originally Posted by Table 5 View Post
It's the A-3, which is basically the lowest end model Toshiba makes. Just be aware that its top ability is 1080i, and not 1080p. It might not make a difference to most, but people should realize that 1080p is what's considered full HD. Either way, still a great deal.
I have a question, something I read on the internet about 1080i
vs 1080p for movies. Not for TV shows, movies only.

Movies are filmed at 24 frames per second.

Your TV supports 60Hz (or 60 frames per second).

Since 24 does not go evenly into 60, they raise it to a common
denominator of 120.

So a movie will display iterate 5 frames over 2 seconds (120 frames).

That's why you have something called "3:2 pullup".

The pattern would be similar to 1-1-1-2-2-3-3-3-4-4-etc.

For 1080i, the pattern is 1a-1b-2a-2b-3a-3b-4a-4b-etc.

Essentially comparing the patterns, 1080i is almost similar to 1080p
for a movie. (A TV show would be 1080p, as that's how they are
filmed)

Is this true? Is this how TV's work? If so, then a 1080i HD-DVD
player would be "good enough"?

ers
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