whats the differenece between 10801 and 1080p?

Question

sorry i meant 1080i*

Answer 1

i stands for interlaced scan, p stands for progressive scan.

Interlaced
Devices that utilize interlaced scanning paint half of the scan lines (referred to as a field) and then paint the second half. Each field is updated 60 times per second. And a frame, made up of the two fields, is completely refreshed 30 times per second. While interlacing works well on smaller sets, on the bigger TV screens that are out today, the refreshing process may be visible to the eye, so that some people notice a perceptible flickering.

Progressive
Progressive scanning paints all of the scan lines onto the screen at the exact same time, 60 times per second. Progressive scanning was developed for computer monitors in order to decrease flickering. Progressive scan has fewer jagged edges and can show movement in better detail with fewer trails (called artifacts).

480i
Picture transmits at 60 interlaced fields per second (30 frames per second). Same number of scan lines and frames per second (fps) as analog, but provides a slightly improved image merely because of digital transmission method.

480p
Same number of scan lines as analog, but sent progressive-style (60 complete fps) resulting in an even more improved picture.

720p
Higher resolution picture with 720 scan lines, sent at 60 complete fps.

1080i
Even higher resolution (1080 scan lines), but fewer frames per second. (60 fields per second, equal to only 30 complete fps).

1080p
This is the ultimate format goal for the future: the best of both worlds with maximum scan lines and maximum fps. No broadcasters have adopted this format, and not many TVs can display it properly.

Answer 2

While several of the previous responders have accurately described the difference between interlace (i) and progressive (p) scan, I would like to add a comment about the problems with interlace and why progressive is always preferred. In the ATSC spec for 1080i/60, the first field contains odd-numbered lines, and the second field contains the even-numbered lines. These fields occur 1/60 second apart. If there is motion in the image, the two fields are not painting the same picture. What you see is two 540-line pictures in quick succession. The result is that edges of moving objects will appear jagged as every other line comes from a later image. In addition, areas that move significantly in 1/60 of a second will not be fully "blended" by the eye, and the resolution in those areas drops to 540 lines. This is why you see some TV broadcasters (noteable ABC, Fox, and ESPN) use 720p instead of 1080i, because they emphasize sports, the programming that suffers most from interlace artifacts.

Answer 3

1080i vs 1080p

The progressive-scan versions of the 1080-line resolution is known as 1080p. Current digital television broadcast systems and standards are not equipped for 1080p50/60 transmission. It is less bandwidth-intensive to broadcast a movie at 1080p24 than 1080i60, since 20% less data would be transferred. In addition, when the source material is 24 frames per second, as are most films, it would be easy to convert a 1080p24 broadcast to an NTSC 1080i60 format using a 3:2 pulldown process (see telecine). On the other hand, most consumer televisions in the world are currently not equipped to receive or decode a 1080p signal at any frequency. Moreover, displaying a p24 broadcast on an i50 system (such as PAL) requires the speed of video and audio be increased by over 4% (to 25 frames per second).

Therefore a hybrid is often used for movies and the like: the frames (25 or 30 per second) are segmented into two interlaced fields with equal time index (psf, progressive in or with segmented frames). The deinterlacer has to perform a simple weave only. This ensures compatibility with 1080i50/60 with only little less coding efficiency than 1080p25/30 and half the bandwidth requirement of 1080p50/60, but the SDTV problems of PAL speed-up and Telecine judder remain.

It would be inefficient to transmit any signal with a frame rate significantly higher than its source’s, which is 24 Hz for movies.

Answer 4

one is i and one is p? I don't know what is a 1080i and a 1080p.

Answer 5

They are both the same resolution, it is simply how the data (lines) are displayed. ''i" stands for interlaced and the 'P' stands for progressive. In interlaced only half the picture is displayed at any given time. It is done so quickly though, your eyes and brain perceive it as one image. In progressive, all lines are displayed simultaneously.

Answer 6

a lot of Time