The differences bewteen 1080p and 720p?

Question

In tvs what is the differences bewteen 1080p and 720p and what does 1080i mean?

Answer 1

To begin with the “p” in 720p indicates progressive. Progressive images are “painted” vertically consecutively line 1, and then line 2, followed by line 3, etc. Computer Monitors are always progressive allowing users to sit very close with minimal eye strain.

The “i” in 1080i indicates interlaced. Interlaced images are drawn vertically line 1, and then line 3 to the bottom of the screen, followed by a second sweep filling in line 2, followed by line 4, etc. This is done quick enough to fool the eye / brain into seeing a coherent image. American television (standard definition) has been interlaced since 1941.

Despite what a salesman tells you - it’s doubtful anyone can tell the difference between the two high definition standards 1080i and 720p. The standards apply to both display devises (televisions) and broadcast networks.

To further demonstrate the equality of the two standards only the ABC networks (including ESPN) broadcasts in 720p. All others broadcast in 1080i. A 1080i television seamlessly converts ABC channels into 1080i. A 720p television effortlessly coverts NBC, and HBO into 720p.

I left the explanation of 1080p to last.

Currently there is no 1080p source. IF High Definition DVD survives, someday the players may include a 1080p output. No 1080p television on the market today will be able to connect to that player. The 1080p standard has not been finalized.

Today a 1080p display “Line Doubles” the 1080i image.

Theoretically a 1080p image should be twice as sharp as 1080i. That is not the case.

Historically line doublers have been very expensive ($20K to $30K). Most 1080p television cost less than $10K.

I have yet to see a 1080p television that impressed me.

My recommendation – read evaluations on the internet from enthusiast websites – do not trust the image you see in a store. It’s common for salesmen to make the television with the highest commission project the best image.

After purchasing your set get it ISF calibrated. You will not believe the improvement you get after a professional calibration.

Good luck.

Dan

Answer 2

A 720p picture has 1280x720 pixels, a 1080p (and a 1080i) picture has 1920x1080 pixels. The 720p pictures originate in progressive scan mode, but 1080p pictures (for the most part) originate as interlaced and must be converted to progressive. The interlaced pictures consist of two 540-line pictures displayed one after the other, with odd-numbered lines first and even-numbered lines second. The eye is supposed to blend the two into one 1080-line picture. Converting from 1080i to 1080p is called "de-interlacing" and if not done well, 1080p pictures can actually contain less resolution than 720p. HD-DVD has the capability of delivering true 1080p, since that is the way the image is recorded on the disc. These players will not have any de-interlace problems.

Answer 3

What Is 1080p And 720p

Answer 4

These numbers represent the vertical
pixel capability of an HDTV. The higher
the number, the higher resolution possible.
See the link for a more descriptive answer...

H a p p y
H o m e
T h e a t e r i n g !

Answer 5

I don't like 1080p it just strains my eyes. I'd rather revert back to the default 720p that some weird eye damaging resolution! Also, i need to do some factory resets on my tv my brother damaged the remote he was taking it outside when skating and accedentaly dropped it and shattered it into bits so i don't know how to adjust or reset the settings now because the remote gone missing. And it's just going to make my eyes worse every time i watch it i can't stand a thing that i watch these days, the minute i watch something, my eyes are burned like hell from a laser! This other day, i was watching The Life of the American Stories and the movie damaged my eyes so bad i had to wear glasses! Also i can't do anything without the damn remote so i would like your help so i can fix it. I am almost blind now because i suffered this extreme intensity! You imao fools mean nothing at all to help me. Thanks for helping anyway, your topics don't state a 1% chance of usefulness! I'd rather be without you right now. agghhhhhh!!!!!!!!

Answer 6

pixels/inch. the 1080 will have more pixels. But, truthfully, watching football I can't tell much difference between the two. Definitely not worth the extra $2000. But, I don't live in front of my tv.

Answer 7

Pixels, its all in the pixels. More of them means a clearer picture.

Oh 1080i is just the format that the picture is delivered in.

here:
http://en.wikipedia.org/wiki/1080i