Whats better 1080p or 1080i

Answer 1

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

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

Human eye cannot differ the two resolutions, so paying an extra £1000+ for 1080p is definitely wasted money.

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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".

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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.

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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 soon.

AnswerOn 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 resolution

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.

Answer 2

Both 1080i and 1080p have an identical resolution on the screen. For static images, there is no difference between the two. The difference between them is that 1080i uses an "interlaced" signal format. The image is generated with 2 passes of the screen. The first draws all odd numbered lines and the second draws all even numbered lines. A "progressive" format refreshes the whole image on every pass so it delivers a full image at twice the rate of an interlaced image. For fast movement, 1080p has the edge over 1080i although most would agree that the difference in perceived quality is not a big one.

Note that the format used is dependent on the program content. If it delivered as a 1080i signal, the fact that a television can handle 1080p does not make the incoming signal a 1080p format.

Also, at present, broadcasters are not using 1080p as a transmission format and are unlikely to use it for a number of years. 1080p is found only on local sources such as games players, Bluray discs and computers.

Answer 3

720p is a resolution of 1280x720 in progressive scan, meaning that the image is refreshed 50 or 60 times each second. 1080i is a resolution of 1920x1080 but is interlaced, meaning that half of the image is refreshed every 50 or 60 times each second and the full image 25 or 30 times each second.

The data rate for both formats is identical. They are both HD but 720p is generally used for sports and action content where the faster refresh assists with movement.

Broadcasters can use either format for HD broadcasts. An HD television will display whichever format is delivered without any intervention from the user.

Answer 4

1080i (60Hz or 50Hz) is the high definition standard for broadcast. 1080p (60Hz or 50Hz) is a format that is currently available only from local sources such as Bluray players, games consoles and computers.

The difference between them is way the image is refreshed. 1080p 60hz means that the image is completely refreshed 60 times every second. 1080i 60Hz means that every other line is refreshed 60 times each second so a full refresh of all the image lines happens 30 times each second. Theoretically, 1080p 60Hz should handle fast movement better than 1080i 60Hz. In practice, there is little to choose.

There are also different versions of 1080p. 1080p 24Hz or 25Hz or is sometimes used for a transfer from film. These frame rates compare with the film frame rate. 1080p 24 is actually a lower data rate than the usual 1080i 50Hz or 60Hz broadcast rates.

Finally, almost all video content is compressed to reduce the amount of data required to be stored or transmitted. The amount of compression can vary widely and the level of compression has an impact on the image quality. Compression often has a greater impact on image quality than the original display format used.

A note about frame rates: In North America, the standard frame rate of 29.97Hz (normally referred to as 30Hz) is used for television. Frame rates of 30Hz and multiples of 30Hz are used, In Europe, the standard frame rate is 25Hz and multiples of it. Therefore, 30Hz and 25Hz suggest North American and European content respectively.

Answer 5

1080i/50 is better than 1080p/25. One frame in 1080i/50 is always derived in half with old and new fields and framerate is truly 50. This makes much better motion but detailaccuracy is same level as in 25p. Both have same bitrate so 1080i is clear winner in this comparison.

1080p/50 has better video quality than 1080i/50 but it has double bitrate which is a problem in broadcasting.

Answer 6

Regardless of the pixel height, progressive scan will always provide a better visual experience. So 1080p.

Answer 7

No, 1080p resolution is better than 1080i resolution. This also holds true with 480i and 480p resolution.