 Which gives better picture...720p or 1080i?
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If you had a choice of picking one of them, which one would you select? I know progressive is better but the 1080 has more lines but not progressive. I thought maybe 540p = 1080i making the 720p better? Educate me on this.
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Re: Which gives better picture...720p or 1080i?
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Maybe I should give better idea based on my equip and tv set. I have Toshiba HDX82 50 inch rear projector. Ithink it only supports 1080i, maybe 720p. Currently I'm using Denon dvd player which only outputs to 420p but the tv itself upconverts to 540p on all 420i and 420p material. I'm thinking about getting upscaling dvd player such as the oppo and I'm just not sure if I should be using the one that supports only 1080i/720p or 1080p version? Not sure if my tv does 720p but I know it does 1080i. Maybe someone who is more familiar with rear projections such as mine which is few years old might know the best scan rates for the tv.
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Re: Which gives better picture...720p or 1080i?
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I think it just depends on your equipment and scalers built into your products on how good of a job they display the material. In my guess, my projector is a native 720p projector, so I have found the picture is better if I match that with 720P. When I use 1080i mode, the projector has to adjust for this higher resolution. I would say just try both and see what you think. 
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Re: Which gives better picture...720p or 1080i?
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Here is a good read on the subject.
Jason
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Re: Which gives better picture...720p or 1080i?
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Wow, now I understand the differences. The only question I have is my tv, I'm not sure if its best to feed my Toshiba 50hdx82 720p or 1080i because I have no idea what the native is (can anyone tell me?) I'm deciding between the oppo 981 vs 971. Currently I have the denon 1600 dvd player 420p through component and the picture is great, but now its time to upgrade.  Also I noticed I have only DVI on my tv, no HDMI. So would it be best to use the cheaper 971 since it has dvi already, or best to use the 981 which has HDMI but can use the HDMI to DVI cable? Is it the same quality or best to use direct DVI to DVI without HDMI to DVI? I'm just upgrading my home theater from few years to get better picture from my dvds the best as possible. Its hard to explain, just trying to find the best combo for my tv in the meantime.
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Re: Which gives better picture...720p or 1080i?
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Judging by the following, I'd say it's a 1080i set. Features of Toshiba 50HDX82Like most HDTVs, the 50HDX82 can display high-definition 1080i material, and it converts incoming 720p HDTV, the format used by ABC, to 1080i. To watch HDTV on this set, you'll need to connect it to a compatible HDTV receiver. When fed standard NTSC video--such as VHS, satellite, or cable--this set's progressive-scan converter kicks in and up-converts the image to 540p. Converting the signal to 540p provides more lines (a.k.a. picture information) than that of the 480p display found in many other HDTVs.SourceRegarding the 971 vs. the 981, the 971 will play DVD-As, but not SACDs. The 981 will play both. If you're not interested in Hi Rez audio, the 971 should suffice. I don't think (speculation, on my part) there's much difference in their video quality, particularly if your TV doesn't have an HDMI input.
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Re: Which gives better picture...720p or 1080i?
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Ok, I guess that means my tv is 1080i and not 720p right? So it would be best to use DVI-D from player to tv and use 1080i for movies from the player? Since I've never seen anything other than 480p from my player/tv combo, I wonder how much better 1080i is from my current dvds. Also is the DVI cables with this player good enough or are they cheapo cables and get better ones from bettercables, signalcable, bluejean cable, etc?
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Re: Which gives better picture...720p or 1080i?
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The bandwidth required by a signal is usually a good indicator of the quality of the signal. The higher the bandwidth, the better the signal. If you look at 1080I and 720P signal bandwidths, you will find out that they are almost the same.
So, I would say that they are about the same!!!
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Re: Which gives better picture...720p or 1080i?
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Basically you have it figured out. The set shows alternating 540P signals which ends up being 1080i.
If you are looking for a DVD player, the Oppo's are great and should have both HDMI and component output. I have a Panasonic S-77 which uses a similar Faroujda chip as the Oppo-971. Oops.... I see the Oppo 981 does not have component outputs and according to the CNET review is really targeted to the videophile with 1080P.
I'd say then go for the 971 and run component cables to your set for DVD and set it to 1080i.
My 1080P set handles 1080i input better than 720P as the conversion is easier. I think you will find the same.
good luck.
Last edited by ctown; 02/26/07 04:16 AM.
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Re: Which gives better picture...720p or 1080i?
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My display only accepts component and DVI-D with HDCP compliant. Currently I'm running my Denon dvd-1600 via component 480p to my display which upconverts to 540p according to Toshiba. I think I have to run DVI cable from dvd player to tv to get better signal than 540p, right? I love my combo right now, but it wouldn't hurt to upgrade the video to try to get the best out of my HD display. The display is the Toshiba 50hdx82 by the way.
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Re: Which gives better picture...720p or 1080i?
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Yup, time to buy some new cables.
Jason
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Re: Which gives better picture...720p or 1080i?
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To me it looks like your Denon 1600 is a progressive scan player which means it will only output 480P. So changing cables will not somehow magically scale to 1080i, you will need an upconverting DVD player like the Oppo 971, 981, Panasonic S-97 or S77, Sony DVP-SA70, etc.
If you like your current setup, then no worries. If you want more, then get the Oppo you mentioned and either run straight component or get an HDMI-component cable.
Bottom line is you cant get HD display without the use of an upconverting DVD player(or blu ray, etc) to generate it.
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Re: Which gives better picture...720p or 1080i?
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I had a quick look at monoprice and do not see a HDMI-component cable available, so you will be best off to go with a DVD player that has component output if you upgrade( the Oppo 981 does not)
Here is a list of what video cable gives the best quality image:
What type of video cable is better?
From lowest to highest picture quality: composite (RCA or F-pin), S-video, component, and finally RGB.
Last edited by ctown; 02/27/07 05:02 PM.
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Re: Which gives better picture...720p or 1080i?
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That post JAKEWASH refered us to had to be the longest, most winded, thread I have ever read. My head hurt after reading it and actually forget what the original question was. Good read though. It's hard to find who was right and wrong. I guess it is all just preference.
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Re: Which gives better picture...720p or 1080i?
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Ctown, your links are not working. I know component is best but I thought DVI-D was better? Yes, right now I'm using component for my denon at 480p and its the best I can get. I know I will need upconverting player such as Oppo to get higher resolution but are you guys saying I can get 1080i through component or use DVI-D? I plan on keeping the Denon since it works great and it can be used as bedroom or secondary player or just cd player, or maybe use it as intro dvd before the movie. But my main question is, which cable is best if you had to chose between component vs dvi-d between my display and upconverting player? Also some Oppos have hdmi and they have hdmi to dvi cable as well. So which is best path to get best pic? By the way, is 1080i better picture than 480p or 540p? If someone can take a pic of each format using same picture/film just to show me the difference that will help.
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Re: Which gives better picture...720p or 1080i?
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Quote:
which cable is best if you had to chose between component vs dvi-d
You may or may not see a difference between DVI or component cables, I would use the DVI-D cable instead of using the three component cables, many upconverting DVD players will only do upconversion through DVI or HDMI, I'm not sure about the Oppos.
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Re: Which gives better picture...720p or 1080i?
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The Oppo 971 does upconversion through component for sure, not sure about what else it has coming out the back. The Oppo 981 does not have any Component outputs, HDMI/SVideo/Composite only.
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Re: Which gives better picture...720p or 1080i?
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Quote:
That post JAKEWASH refered us to had to be the longest, most winded, thread I have ever read. My head hurt after reading it and actually forget what the original question was. Good read though. It's hard to find who was right and wrong. I guess it is all just preference.
It wasn't about right or wrong it was mostly about knowing the native resolution your HDTV uses so that you know which setting to use. It does say somewhere in that length(or was it somewhere else I was reading), most people prefer 720P to 1080i if the incoming signals are the same, ie. 720P set showing 720P signal and 1080i set showing 1080i signal, the 720 appears smoother. It also says if buying a smaller than 50" 1080P set is a waste of money as your eye can not see the higher resolution in the smaller displays from normal watching distances on smaller HDTVs.
Jason
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Re: Which gives better picture...720p or 1080i?
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Ctown, your links are not working. I know component is best but I thought DVI-D was better? Yes, right now I'm using component for my denon at 480p and its the best I can get. I know I will need upconverting player such as Oppo to get higher resolution but are you guys saying I can get 1080i through component or use DVI-D? I plan on keeping the Denon since it works great and it can be used as bedroom or secondary player or just cd player, or maybe use it as intro dvd before the movie. But my main question is, which cable is best if you had to chose between component vs dvi-d between my display and upconverting player? Also some Oppos have hdmi and they have hdmi to dvi cable as well. So which is best path to get best pic? By the way, is 1080i better picture than 480p or 540p? If someone can take a pic of each format using same picture/film just to show me the difference that will help.
First, there was no link, just the hilighted part in blue that said component or RGB were the best. HDMI is the same pic quality as component, but more convenient with the audio coupled in it as well.
If I had to choose between component or DVI, I'd choose whatever is less expensive or more convenient to you as you probably will not notice any difference. See the quote in RED I copied from another forum on the topic.
If there is any difference, it is very negligable. In more experiences, the quality of the connectors on the device have a greater impact on the quality, meaning that on some DVD players/HD STBs, etc..., one type of connector may not be designed with as much playback quality as another. This could even be simply a firmware issue.
Either way, I have played with DVI vs. Component on my Moto DCT6200 and I can't see a real difference.
To your last question...is 1080i better than 480P or 540P. In a word YES. My 27" direct view CRT is capable of displaying 540 lines of vertical resolution but is not High Definintion. 1080i is High Definition.
Watch digital Standard Definintion TV on your TV as that is 480P. Then visit a retailer and see if you can find a similar RPTV showing a HD broadcast as most of those are 1080i broadcasts. The difference is night and day.
My friend had a 61" Toshiba CRT that does 540P/1080i and was only watching Standard Def thru it. I found it harsh to watch and the pixels were evident. He then got a HD set top box feeding a 1080i signal into it and now it looks fantastic.
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Re: Which gives better picture...720p or 1080i?
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Quote:
It does say somewhere in that length(or was it somewhere else I was reading), most people prefer 720P to 1080i if the incoming signals are the same, ie. 720P set showing 720P signal and 1080i set showing 1080i signal, the 720 appears smoother.
That is probably due to no conversion having to be done by the video processor, not wether the source is progressive or interlaced.
My 1080P set processes 1080i very easily compared to 720P which shows some jaggies. It converts 480P very well too, but the pic is soft on the 61" display.
Its just my opinion, but to the OP...either cable will work very similar, just calibrate your TV using Digital Video Essentials or Avia disc once you have it hooked up. Some have said their display looked different when connected via component vs DVI, but that was corrected when they calibrated it.
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Re: Which gives better picture...720p or 1080i?
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That is probably due to no conversion having to be done by the video processor, not wether the source is progressive or interlaced.
You would be correct, if a set needs to use its video proccessor to convert the signal, it generally looks much worse than its native resolution.
I have looked at both side by side(almost) with this set up, one TV set for 720P res and its native res was 720 and a set nearby was 1080i with native 1080i. I could see a slight but noticeable difference. the 720 was smoother and cleaner/crisper looking, IMO. Both looked incredibly good compared to my 10yr old 36".
Jason
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Re: Which gives better picture...720p or 1080i?
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How do you tell or force either the tv or the dvd player to do the upconversion? What I mean is....how do you know if the tv is doing the upconversion or the player? I'm still trying to find images showing differences between 480p, 720p, and 1080i. I know most people are saying they can't tell a difference between 720p and 1080i, but how much better is 1080i over 480p or even 540p?
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Re: Which gives better picture...720p or 1080i?
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Usually the upconversions are done through menus on the DVD players and I believe most TV's will upconvert depending on the setting you choose when setting it up as well. I find if I go into Best Buy or Future Shop I can usually get the salesperson to let me have the remote and from there I can check the TV settings and every so often I am able to get a hold of the DVD or source remote as well, then I can check its settings also.
1080i and 720P are waaaaayyy better than 480P. Think about it, almost twice as much information in a 720P signal as a 480P(240 extra lines actually)) and 1080i(540 drawn twice to get the interlacing)has an additional 60 lines of resolution times 2 for an extra 120 lines. On a big screen it is very noticable, especially a few feet away. The farther back you go the less you can pick out, which is why the bigger you go, the higher the resolution you need, as the eye starts picking out the pixels because the pixel size would need to grow to accomodate the larger screen, if it were to stay at the same resolution as the smaller screen.
Jason
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Re: Which gives better picture...720p or 1080i?
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Sounds to me like to need to go to one of the local stores and have the salesman give you a demonstration. No doubt that there is a huge difference!!!
The Rat.
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Re: Which gives better picture...720p or 1080i?
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Ok, maybe I shouldn't worry too much about 720p vs 1080i at the moment and just upgrade from my 480p to get the best my display can handle. I think I'm gonna have to buy one of those Oppos to get 1080i on my 50 inch display and just keep the 480p for maybe intro dvd or cd player. Looks like I'm gonna have to start another thread between the differences in Oppos. Agghhh!!!
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My experience with my projector, which is native 720p, is that 720p looks much better using either my Panasonic upconverting DVD player, or my HTPC. Matching the resolution 1:1 gives me better results. I've tried 1080i, but the picture does not look as nice, in my opinion.
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Quote:
Ok, maybe I shouldn't worry too much about 720p vs 1080i at the moment and just upgrade from my 480p to get the best my display can handle. I think I'm gonna have to buy one of those Oppos to get 1080i on my 50 inch display and just keep the 480p for maybe intro dvd or cd player. Looks like I'm gonna have to start another thread between the differences in Oppos. Agghhh!!!
The 981 has only HDMI video out and your current set does not have HDMI, so stay away from it.
The 970 has HDMI and component out, so you are covered there.
The 971 has component and DVI out and includes a DVI-HDMI cable for when you eventually upgrade to a TV with HDMI input....so you are fine there.
Pick between the 970 and 971.....you should be fine. Congrats on getting to the end of the search.
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Congrats on getting to the end of the search.
It's just the beginning of the next one......
Jason
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How do you tell or force either the tv or the dvd player to do the upconversion? What I mean is....how do you know if the tv is doing the upconversion or the player?
I have a hard time understanding the above too, obviously I do not own an up-converting (or upscaling) player. PS3 does NOT upscale. I have been told here that my Samsung DLP 720p upscales, but I can't seem to understand how, sorry!
Those Oppos look really good with some stellar reviews. I own and rent many standard DVDs and I wonder how they would look through such player. Any direct experiences?
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Re: Which gives better picture...720p or 1080i?
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The DVD players have menu options to control the outputs. My Pioneer 578 doesn't support upscaling or HDMI so my only options are to set the component outputs to "progressive" or "interlaced". If the player did support upscaling then I would also have menu options to choose output resolution.
I have not had a chance to A/B between an Oppo and a more typical player but my understanding is that you would see a slight but noticeable difference in difficult scenes, eg. diagonal lines or edges. In these scenes the Faroujda processor apparently does a better job of filtering the edges, giving you a smoother image while retaining sharpness.
I have seen that effect when playing with other digital filtering chips (including our own graphics chips) -- more taps and better algorithms do make a noticeable difference in image quality.
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Re: Which gives better picture...720p or 1080i?
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Hmm, the Toshiba 50HDX82.
Sounds familiar.
Ah yes, we do own one.
Lovely 1080i picture, just lovely.
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Re: Which gives better picture...720p or 1080i?
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Jason,
i found that article you linked very insightful and hopefully worth some more exchange on the topic. What i think i learned from that article, considering it did make the old noggin' hurt a wee bit, is:
-all 720p is @ 60fps
-all 1080p/i is @ 24-30fps
-most (all???) 1080p tvs can only display 24fps???
-the holy grail is 1080p @ 60fps
-the holy grail is unattainable with current technology/bandwidth limitations
-depending on how far you are sitting from your tv you are better off with 720p @ 60fps than 1080p @ 24fps
-save your money and get a 720p set
How far off the mark am i here?
Any more thoughts on this anyone?
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Quote:
Jason,
i found that article you linked very insightful and hopefully worth some more exchange on the topic. What i think i learned from that article, considering it did make the old noggin' hurt a wee bit, is:
-all 720p is @ 60fps
-all 1080p/i is @ 24-30fps
-most (all???) 1080p tvs can only display 24fps???
-the holy grail is 1080p @ 60fps
-the holy grail is unattainable with current technology/bandwidth limitations
-depending on how far you are sitting from your tv you are better off with 720p @ 60fps than 1080p @ 24fps
-save your money and get a 720p set
How far off the mark am i here?
Any more thoughts on this anyone?
You are very close with everything. Broadcast 1080i is 60fps, so a 1080P display merely holds half of the 1080i (540 lines)and sends with the other half to get you 1080P @ 30fps.
A 720x 1280 TV has approx 1 million pixels, while a 1080x 1920 TV has approx 2 million pixels, so having a 1080P set allows you to have a larger tv and sit closer than a 720P
If you are sitting beyond the distance where you notice the pixels you can save some $$ and just get a 720P set. I will say that side by side, I notice my 61" 1080P JVC had more depth to the picture than compared to the same 61" 720P JVC set.....but in your living room with nothing to compare to, they both look outstanding.
If I was going to buy a 50" or smaller TV I would go 720P and save some cash. But the difference in prices are narrowing so why not get 1080P if the prices are close.
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Re: Which gives better picture...720p or 1080i?
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so to expand on that a bit then, current 1080i is @ 60fps, but once it de-interlaces it becomes 1080p @ 30fps. I'm trying to wrap my brain around this whole thing because i was hoping to have a new tv for my completed ht room (expected completion date Apr 15).
So if no current 1080p displays will handle 60fps (is this correct?) and that is the holy grail, then there is no way to future proof against this, if i cared to do so. But if current displays of 720p @ 60fps are > 1080p @ 30fps, then one would be just as well suited with a 720p for probably a number of years....until technology can accomodate 1080p @ 60fps. Now i believe this is a complete moot point for me anyways, since i am looking at a 60/61" Toshiba or Samsung DLP set (yes i talked myself down from a 72") which isn't available in a 720p anyway.
"Chickens don't clap."
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Re: Which gives better picture...720p or 1080i?
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If you are looking at a 61" you may still benefit from 1080P but that would depend on how close you plan on sitting to it. General rule is greater than 50" look at 1080 and less than 50" 720. You will still benefit from 1080 at the 61" you are looking at. The pixels are starting to get quite large at that size and your eye can pick up on them easier.
Jason
M80 v2
VP160 v3
QS8 v2
PB13 Ultra
Denon 3808
Samsung 85" Q70
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Re: Which gives better picture...720p or 1080i?
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Sid, if you keep waiting for the "holy grail" you will never purchase a TV. The new Holy Grail is now Ultra HDTV which is 7680x 4320 (or 4320P). More research will show that movie studios film on digital film at a frame rate of 24fps in many cases and there is a whole procedure the processor does called "reverse telecine" that delivers that signal to the output of your TV. Dont get caught up in the "paralysis by analysis" and take the things you hear from sales clerks with a grain of salt. So many of them told me" 1080P is useless since there is no 1080P source" and that is just wrong. -Blu-Ray will give you a 1080P source for a 1080P set. -Many TV's have excellent videoprocessors that will convert a 1080i source to 1080P. Like Samsung 87 series DLP, JVC HDILA, Sony XBR SXRD, Panny Plasma, etc. -one guy told me there were no issues with DLP, while another said he sold his brother a 44HMX85 and made him get extended warranty because he gets so many back. If your eyes cant notice that the picture is being delivered by a series of reflective mirrors and a spinning colour wheel with DLP....they will not notice the difference between 24, 30 or 60 FPS. Do a google search on DLP lamp failures with Toshiba DLP. I almost purchased a 62HMX85 last year and glad I didnt after speaking with a few dealers and seeing the problems. I was a big DLP fan, but after doing more research decided to go with a technology with less moving parts. I'd seriously look at LCOS or if you want DLP, consider the Samsung as the picture is smoother and seems to have a better track record. Finally, let your eyes be the judge.
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Re: Which gives better picture...720p or 1080i?
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thanks for the continued help on this guys....i think after it's all said and done, i'm going to move on this set currently on sale: Toshiba 62HM196 for $1800 For that price it is pretty tough to pass up. I think considering the potential for repair issues with this newer technology i am going to consider the extended warranty. I am not typically a big believer in it, but for a couple hundred dollars, it is pretty cheap insurance. Thanks again
"Chickens don't clap."
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Re: Which gives better picture...720p or 1080i?
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Here’s a good article worth reading. http://www.hometheaterhifi.com/volume_14_1/feature-article-1080p-3-2007-part-1.htmlIt doesn't specifically address whether 1080i or 720P is better, but gives the reader a fairly good picture of what’s happening in the pixel chain from source to display. Personally, I prefer 720P over 1080i. Especially for sports.
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Re: Which gives better picture...720p or 1080i?
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Sid, if it looks good to your eyes then buy it. Maybe see if Visions has that model and they will cut you another 5% off the advertised price. Here is a review of that TV. 62HM196 review Like I said before if you search for the holy grail, you will never buy a TV. This set "wobulates" the 960 lines of horizontal resolution to produce 1080P x 1920i. Just a little more tech jargon to confuse the issue. Sit as far back as you will at home from this TV and watch some HD, SD and DVD on it in store. If you like it, buy it, then enjoy it when you get it home. Good luck. Man I miss Harry's Ukranian Kitchen in Brandon back when the food was great.
Last edited by ctown; 03/19/07 10:23 PM.
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Re: Which gives better picture...720p or 1080i?
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Hi all,
A few comments on this thread. Many broadcasters prefer 1080i because it requires less bandwidth to transmit. By the way, 1080i is made up of 60 alternating fields of 540 lines each per second, which are interlaced together and total 30 frames per second.
Mdrew is correct in that 720p, which presents 30 progressively scanned full frames per second (not alternating fields), is generally felt to be better for sports, with smoother reproduction of fast horizontal motion.
But it isn't a question of which one--720p or 1080i-- is "better" than the other. Both represent the two standards for High Definition TV broadcasts, and both look wonderful with a good set, much, much sharper and clearer than Standard Definition (480i) images.
Upconverting DVD players deliver a digital video image via HDMI or DVI, whereas component video passes HDTV images as analog information. In theory, the digital image via HDMI or DVI should be better because fewer digital-to-analog and analog-to-digital conversions take place. I said "in theory" because in practice, the digital anti-piracy codes that take place with HDMI or DVI connections use up lots of bits or processing power that are not devoted to image quality. Consequently, an upconverted HDMI or DVI image may or may not look better than analog component video connections. Try them and see which produces a better picture; you may not see any differences. Or sometimes, the HDMI image may be inferior to the component video.
Oppo players (and some other brands) tend to deliver remarkably impressive upconversion of Standard Def DVDs. While it's still not quite the equal of true High Def, it's so close that at times you forget you are not watching HD image quality.
Regards,
Alan Lofft,
Axiom Resident Expert (Retired)
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Re: Which gives better picture...720p or 1080i?
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Alan, I think my opinion is biased towards 1080i as I have a 1080P set where the video processor in the TV apparantly holds the alternating 540 lines at 60fps and displays them as 1080P @ 30fps.
All I know is if I set my STB or Panasonic upconverting DVD player to 720P it looks more jaggy than if I set it to 1080i. I think its because the processor has to do more converting. Does that sound like a correct assumption?
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Re: Which gives better picture...720p or 1080i?
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Joined: May 2002
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CT, one conclusion that can be drawn from what you describe is that your set does a better job of de-interlacing than the player does. When 1080i comes in, the set(instead of the player)has to de-interlace the i to p because the set is inherently progressive.
-----------------------------------
Enjoy the music, not the equipment.
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Re: Which gives better picture...720p or 1080i?
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local
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Just saw this old thread and wanted to make a few comments.
ABC, Fox and ESPN-HD all transmit 720p for HD shows. Most other content providers use 1080i. So if your favorite HD shows are on ABC, Fox or ESPN, I'm not sure a 1080 native display would make much difference.
In theory 1080i material would look better on a native 1080 display, at least for scenes not involving lots of motion.
However -- I think all current 1080i providers aren't transmitting full-bandwidth 1080x1920 at 30 fps, but a cut-rate version using 1080 x 1440. This is due to limitations in current HD camera equipment and inability of the distribution chain to handle compression at full bandwidth.
By contrast providers of 720p (1280x720 at 60 fps) can handle the full bandwidth of that format, since the data rate is lower.
Stored HD source material such as Blu-Ray are in 1080 resolution, so a native 1080 display would be optimal for that.
However for current equipment, over-the-air, satellite and cable HD providers are only transmitting 1080i frames using 1440 x 1080 resolution for 1.55 megapixels per image. At 30 images per second, that's a data rate of 46.6 megapixels/sec.
By contrast, 720p images are 1280 x 720 for 921k pixels per image. At 60 images per second, that's a data rate of 55.3 megapixels per second.
So current 1080i still images have more pixels, but the overall data rate is lower. Thus when considering movement (panning, zooming, object movement) the effective delivered resolution may be less for 1080i than 720p as currently implemented.
The full 1080i implementation is 1920 x 1080, for 2.07 megapixels per image, at a data rate of , 62.2 megapixels per second. However it's unclear when content providers will be able to transmit this -- possibly not for a long time.
Native 1080 displays used to be very expensive, but prices have come down a lot. If I were buying a new display I'd get a 1080 native display.
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Re: Which gives better picture...720p or 1080i?
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Joined: Dec 2003
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shareholder in the making
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You've got 1080i confused with 1080P and it will be a long time before anyone will have the bandwidth to tranmit in 1080P. A 1080P native set will not necessarily produce 1080i any better as the lines of resoltion in 1080i are half as the i stands for interlaced so it is infact only showing 540 lines of resolution drawn twice on the screen. must go can't finish thought, kids screaming in background.....
Jason
M80 v2
VP160 v3
QS8 v2
PB13 Ultra
Denon 3808
Samsung 85" Q70
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Re: Which gives better picture...720p or 1080i?
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Joined: Dec 2003
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local
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Quote:
You've got 1080i confused with 1080P and it will be a long time before anyone will have the bandwidth to tranmit in 1080P.
No, I was talking mainly about 720p vs 1080i:
720p is 1280 x 720 for 921k pixels per b&w image. At 60 images per second, that's a "dot" rate of 55.3 megapixels per second. Assuming 24-bit-per-pixel color, that's 55.3E06 * 24 or 1.327 gigapixels/sec.
HD providers are currently only transmitting 1080i frames using 1440 x 1080 resolution for 1.55 megapixels per b&w image. At 30 images per second (two interlaced fields @ 60/sec), that's a "dot" rate of 46.6 megapixels/sec. Using 24-bit color, that's 1.1 gigapixels/sec.
The full 1080i implementation is 1920 x 1080, for 2.07 megapixels per image. At 30 images per second, that's a "dot" rate of , 62.2 megapixels per second. Using 24-bit color, that's 1.49 gigapixels/sec.
So 720p actually delivers more content per second to your screen with the current over-the-air and satellite implementations. However for still or slow changing scenes, 1080i will show more spatial resolution.
There actually is no 1080p transmission standard -- the two highest ATSC modes are 720p and 1080i. However modern displays can buffer the two interlaced fields of the 1080i format, rendering them as a single frame. But the display capability doesn't change the transmission data rate unique to each format, which ultimately determines the visual quality of what you see.
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