What is better 1080P or 1080i?

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Wiki User
2011-09-13 14:55:38


1080p - the frame is produced by using a single progressive


1080i - the frame is produced by using two simultaneous diagonal


Human eye cannot differ the two resolutions, so paying an extra

£1000+ for 1080p is definitely wasted money.


I think that 1080p does give a better picture, but you can only

start to appreciate it on the bigger sized tv. For a 1080p screen

to be noticably better than a 1080i one, you would probably need a

screen size of over 60".


The human eye can actually tell the difference very well,

especially when watching fast action or sports. 1080p is

technically better to watch, but theoretically worse because it

does not have the two sets of 540 interlaced lines being displayed

alternately. Because each frame is composed of two separate lines

being displayed and two moments in time, if the recorded object

moves fast enough to be in different places when each field is

captured it creates a 'combing' affect. So technically 1080p is

better especially when you watch closely.


It also depends on the output of the signal being sent into the

HDTV. over 85% of tv networks are being broadcast into 1080i the

rest is 720P. When will they switch to 1080P? They won't it took

over fifty years for the government to change the standard and it

hasn't even been effect yet. Stations have already committed to

either one of the standards and will be unlikely to change anytime


"bAnswer/b" id="bAnswer/b">Answer

On an Interlaced Picture the scan lines of a frame are arranged in

two fields each. One of the two fields contains the odd lines and

the other field contains the even lines. Interlacing is when these

two fields are shown in sequence at twice the rate of the actual

frame and at half the resolution. So each half frame is shown and

is slightly different.

In the UK PAL televisions operates at 25 frames a second with 50

fields a second (USA 30 frames a second with 60 fields a second). A

broadcasted signal that is Interlaced requires half the signal

bandwidth of a Progressive signal. A progressive signal has a scan

rate of 50 full frames per second compared with an interlaced

signal which has half the frame speed.

Interlaced pictures on recordings made for television or with a

video camera aren't able to be displayed on standard definition LCD

televisions and Plasma televisions. This is because the picture

isn't created with an electron scan like CRT tv's so LCD

televisions and Plama TVs don't gain from the interlaced picture

signal. Flat panel widescreen televisions have internal processing

to create a progressive scanned picture from a interlaced image -

i.e. Deinterlacing.

Progressive scanning is a method to display, transmit, and store

a moving picture. Each frame has all of the lines instead of even

lines or odd lines as with an Interlaced signal and they are shown

in sequence.

The benefits of Progressive Scanning is that there is a greater

vertical resolution than on Interlaced pictures at the same frame

rate with out blurring, interlace artifacts, and reduced eye

strain. It is also possible to scale to a higher resolution than it

is with comparable interlaced sources. Because interlaced signal

sources have to be deinterlaced before scaling with obvious combing

artifacts, Progressive scanned full images give the best results

when scaling.

The conversion of a progressive source such as 1080p/50 into an

interlaced configuration such as 1080i/25 is easier than the

conversion of an interlaced signal to a progressive format.

On a still picture there wont be any difference in picture

quality between 1080i and 1080P. However with a 1080P source on

moving images the 1080P will produce more fluid motion and higher


If you don't intend to use a Blueray player, PlayStation 3, or

to download films from the internet then a HD ready 1080i/720p tv

will probably suffice. However if you want to future proof your

self against possibility of future Full HD 1080p broadcasts then

the full HD 1080p models are the ones to buy. Obviously if you have

or are going to buy a Blueray player, PlayStation 3 or to you are

going to down load full HD films then the full HD 1080p is the

logical choice.

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