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Old December 31 2008, 04:01 AM   #1
thirteenth
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1080i vs 1080p?

I've always been curious--is there that much of a difference between 1080i and 1080p television resolutions?
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Old December 31 2008, 04:03 AM   #2
Kryton
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Re: 1080i vs 1080p?

Progressive scan is ALWAYS better. At least at 720p. I can't seem to get my TV to accept a 1080p signal...only 1080i. <shrug>

Interlaced video has always been...cost effective. But it's really not an issue anymore and no longer necessary to split up the frames like it was when NTSC was being developed.
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Old December 31 2008, 04:04 AM   #3
Mr. Laser Beam
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Re: 1080i vs 1080p?

josephberte wrote: View Post
I've always been curious--is there that much of a difference between 1080i and 1080p television resolutions?
Not a whole lot, no. Not with the distances that most people sit from their TVs. If you can afford it, go ahead and go with 1080p, but if money is tight then you will do just fine with 1080i (or even lower, such as 720p; with most viewing distances, 720p is as good as any).

The only way you can even get 1080p is Blu-Ray (and some downloadable trailers). There are no broadcasts with that resolution, in cable or satellite, that I'm aware of.
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Old December 31 2008, 04:23 AM   #4
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Re: 1080i vs 1080p?

Both Dish and DirecTV are playing with PPV downloads at 1080p. It's still in its infancy, with very few titles and some bugs. They'll figure it out. Even though these are satellite providers, both download the 1080p movies over the Internet.

The active pharase in your question, josephberte, is "television resolutions." Since all HDTV is currently broadcast in either 1080i or 720p, and will remain that way for the conceivable future, you won't notice a difference with 1080p on television. Yes, Blu-ray is 1080p. Other future digital formats certainly will be. But with this were talking movies, concerts or games, not television.
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Old December 31 2008, 04:24 AM   #5
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Re: 1080i vs 1080p?

Babaganoosh wrote: View Post
The only way you can even get 1080p is Blu-Ray (and some downloadable trailers). There are no broadcasts with that resolution, in cable or satellite, that I'm aware of.
This is the heart of it. 1080p is better, but it's unlikely you'll make use of it much.

Even with a 1080p Blu-Ray disk I'd still call the difference between an 'i' and a 'p' tv set "marginal."

The ONLY time I'd say that 1080p is critical is if you're planning on hooking a computer up to the television.
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Old December 31 2008, 06:10 AM   #6
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Re: 1080i vs 1080p?

Okk, thanks all.. It's just been something I've been curious about. My Dad has a 1080i tv that does not do 1080p. I know the xbox 360 does 1080p, it's just that his tv only does 1080i, which is okay.. We don't even have a bluray player, though the upconversion on our Oppo dvd player is great...
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Old December 31 2008, 07:26 AM   #7
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Re: 1080i vs 1080p?

I find these responses somewhat surprising. In a very real way, 1080i is HALF of 1080p. On a reasonably sized television (37'' or above), if the difference is not immediately apparent to you, maybe spring for new eyeglasses before the new TV. You don't have to run out and buy a superior HDTV if you already have an HDTV, of course, but let's not marginalize the difference.
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Old December 31 2008, 07:32 AM   #8
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Re: 1080i vs 1080p?

JNG wrote: View Post
I find these responses somewhat surprising. In a very real way, 1080i is HALF of 1080p. On a reasonably sized television (37'' or above), if the difference is not immediately apparent to you, maybe spring for new eyeglasses before the new TV. You don't have to run out and buy a superior HDTV if you already have an HDTV, of course, but let's not marginalize the difference.
If you're sitting about an inch from the screen, then maybe. But at the distances that most people sit, they'd never notice the difference.
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Old December 31 2008, 08:11 AM   #9
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Re: 1080i vs 1080p?

Babaganoosh wrote: View Post
If you're sitting about an inch from the screen, then maybe. But at the distances that most people sit, they'd never notice the difference.
No.

You are correct that most people tend to sit at too far a distance that is "correct" for their TV... but even if you're being sarcastic, characterizing the distance necessary to see the difference between 1080i and 1080p as "about an inch" is wrong.
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Old January 3 2009, 06:49 AM   #10
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Re: 1080i vs 1080p?

1080i is really the same as 720p, which is why most tv's that do 720p will do 1080i but not 1080p.

The difference lies in refresh formats. Think of the screen as a brick wall. With interlaced, every other row is updated. So part of the past frame is still on the screen each time. This can cause the picture, especially lines like the edge of a building or person, to look "blocky". Progressive updates the entire frame, so it is a much better picture quality.

If you get a tv which offers 720p or 1080i as the max settings, stay with 720p as the picture quality will be much better.
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Old January 3 2009, 06:53 AM   #11
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Re: 1080i vs 1080p?

The difference is similar to that between uncompressed audio and mp3. SOME people can hear it (see it) but MOST people are willing to let the missing/lost information go by because it wasn't something they'd noticed in the first place.
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Old January 3 2009, 07:00 AM   #12
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Re: 1080i vs 1080p?

It's a huge difference.

If I had to choose between 1080i and 720P I would use the 720P and have.
The Progressive scan is far better.
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Old January 3 2009, 07:26 AM   #13
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Re: 1080i vs 1080p?

Oh, I agree the difference is immense. I was only pointing out that people (in large) are willing to discount such differences...especially if there is a dollar consideration involved. Otherwise HiDef would be ubiquitous instead of pretentious.
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Old January 3 2009, 09:11 AM   #14
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Re: 1080i vs 1080p?

Kryton wrote: View Post
Oh, I agree the difference is immense. I was only pointing out that people (in large) are willing to discount such differences...especially if there is a dollar consideration involved. Otherwise HiDef would be ubiquitous instead of pretentious.
I wasn't really debating your comment, just answering the OP.
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Old January 5 2009, 11:44 AM   #15
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Re: 1080i vs 1080p?

If you're watching 1080p and the same thing at 1080i, you probably can't tell the difference, generally speaking.

If you know what to look for, you may be able to tell the difference.
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