In Theory: How iPad 3 Breaks the 1080p Barrier
Digital Foundry assesses the remarkable rumours surrounding Apple's next tablet.
It's that time of the year again. In the next calendar month, Apple is widely believed to be unveiling its third-generation iPad, and the engine at the core of the rumour mill is being cranked up to maximum warp in anticipation. Stalwart news site MacRumors has managed to acquire one of the new displays while Chinese forum WeiPhone has already hosted photographs of what many believe to be the iPad 3 logic board. Combined with other rumours currently circulating, a picture is beginning to form of the kind of device iPad 3 is and the level of power it is capable of delivering.
But first we need to assess the quality of the rumours in question. This close to release, we'd be inclined to believe that they're quite reliable. Apple isn't like a conventional games company: it keeps its cards close to its chest, and even before announcing a new product to the world it's already well into production. When it comes to mass-producing millions of units in a faraway country staffed by poorly paid workers, it's inevitable that leaks occur and across the years they have been growing increasingly accurate. Seemingly they're getting ever closer to home too - incredible pictures, highlighted by tech site MicGadget seem to be spy-shots taken directly from the iPad 3 production facility.
As it happens, most of these leaks are eminently plausible precisely because of the lack of surprises they offer. MacRumors says its OEM replacement screen confirms that the new iteration of the iPad offers a 4x resolution boost over the existing 1024x768 4:3 panel, offering up a mammoth 2048x1536 pixel count. The implications are immense: this would offer an increase in resolution of over 51 per cent compared to the 1080p plasma or LCD you may have in your living room or office, and within its 4:3 aspect ratio it will easily be able to display a full HD movie rendered in native resolution with real estate to spare. All this on what we would assume is the same 9.7-inch sized screen as the current iPad.
"An iPad 3 'Retina' display along the lines being rumoured would offer an increase in resolution of over 51 per cent compared to the 1080p plasma or LCD you may have in your living room or office."
MacRumors acquired what they say is an OEM replacement iPad 3 display and put it under a microscope, ascertaining that there were four pixels for every one on the current screen, seemingly confirming an impressive 2048x1536 resolution for the new tablet.
Its pixels-per-inch count may well be lower than the iPhone 4's "Retina" display, but the screen is larger and likely to be held further away, so the overall impact of the mega-resolution should still be quite remarkable. The new screen brings with it obvious implications, not just on the make-up of the rest of the device but also on Apple's lucrative media delivery services. Right now, iTunes' definition of HD content is basic 720p, which would look rather miniscule rendered at native resolution on the new display. Rumours have been circulating for some time now that Apple has been moving up towards a so-called HD+ service, with content encoded at 1080p. Such a move makes plenty of sense, not just for the new iPad, but also for the completely integrated Apple TV displays that the company is said to be releasing at some point in the near future.
A "Retina" screen for iPad 3 also suggests that we should be seeing some significant upgrades to the camera in the new device. The iPad 2 only supports 720p movie capture at 30 frames per second - fine for the existing display, but upgrading this element up to 1080p for the new unit makes a lot of sense. Elsewhere within the tablet, we're looking at some serious architectural upgrades to maintain such a mammoth display with the kind of fluidity and response expected from an Apple product.
The Mysterious A5X - Quad Core or Not?
Here's where the leaked photo of the logic board and its mysterious A5X SoC (system on chip) comes under scrutiny. The notion that the main processor may not be called A6 has led many to believe that we are looking at an incremental upgrade of the existing chip found within the iPhone 4S and iPad 2, and there are concerns that a boosted version of the dual-core A5 simply won't have enough horsepower to maintain that incredible display. The important thing to factor in here is that Apple's definition of an incremental upgrade may well be quite removed from what we think it is.
The transition from A4 to A5 truly was a generational jump in terms of processing performance: core count on the Cortex A9 doubled, but the big news was that the SGX535 graphics core in the iPad 1 and iPhone 4 was given the boot in favour of brand new dual-core architecture from PowerVR maker IMG. The boost in CPU power between the chips was obvious, but it was in the graphics technology that we saw the biggest improvement. In truth, the original iPad's GPU - the same as that in the iPhone 3GS, but running at a higher clock speed - was inadequate for the much higher tablet resolution. A5 addressed that with the PowerVR SGX543 MP2 offering anything between a 4x to 9x improvement in power depending on the benchmark.
"An A5X doesn't necessarily rule out quad-core processing for iPad 3 - adding more CPU/GPU cores to the existing architecture would be a natural incremental upgrade."
Everyone expected an A6 chip in the iPad 3 but the revelation of the 'A5X' suggests an incremental update rather than a generational leap. A quad core ARM Cortex A9 in concert with a PowerVR SGX543 with either three or four cores still makes sense though.
An incremental upgrade for A5 makes much more sense because its architecture is inherently scalable: Apple can maintain that phenomenal resolution either by introducing a third graphics core (SGX543 GPU core count can be odd or even) and running all three at a much higher clock speed, or it well be the case that it will opt for a fourth core instead at the same speed. The current A5 is fabricated on the mature 45nm process by Samsung, and it's widely believed that iPad 3's processor will be produced at 32nm - so despite the increased power, it should still maintain the platform's enviable battery life.
Despite the worries that Apple will retain a dual-core A9 for the A5X processor, evidence suggests that we will be seeing a quad-core chip. BGR.com's leaked iBoot dump correctly identifies A5X's S5L8945X model number (A4 was S5L8930X, while A5 was S5L8940X) and is unequivocal about the number of CPU cores being utilised: four. Developer betas for newer iOS revisions have also seen support for quad-core CPUs, strongly suggesting that the OS was being tested on A5X. Whether the configuration will be four vanilla A9 processors or something more customised remains to be seen.
Will ARM A15 'Eagle' and PowerVR 'Rogue' Power the Next-Gen A6?
So if the new processor is so capable, why not name it A6? What is the actual significance of A5X? A look at the future of mobile technology puts everything into perspective. The march of technological innovation in this field is relentless; ARM is working on its next-gen A15 "Eagle" architecture, while IMG's "Rogue" GPUs are about to break cover. Adding cores to an existing design is incremental, moving to a new, more powerful, more capable technology is an entirely different ballgame.
"The focus for the iPad 3 reveal will almost certainly be on the most obvious upgrade: the new display, and how it improves what is already an excellent product."
iPad 3 will no doubt be highly capable, but let's put it into context with competing upcoming technologies: Sony's NovaThor chipset, in particular the 28nm A9600, represents the kind of generational leap in power we should expect to see in the full-blooded A6. A basic look at the raw specs suggests that this is the kind of power level that will finally see mobile technology match that we have now in our current gen home consoles, from a GPU perspective at least.
This is obviously exciting stuff, but it's unlikely that we'll see actual shipping products with this level of power until this time next year. The technology may be ready, but mainstream production of 28nm chips at good yields isn't really there yet. That being the case, the focus for the iPad 3 reveal will almost certainly be on the most obvious upgrade: the new display and how it improves what is already an excellent product.
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Comments (89) Latest comment 3 months ago
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Apple Magic Land: RETINAS! SPEEEEDS! MAGIC! BUZZ WORDS!
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But seriously pushing all those pixels is going to take a insane processor and lot of battery, it almost doesn't seem worth it.
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I would much rather have a more modest resolution boost and have Apple look at the way other companies are using; Nokia's clearblack displays are excellent and make iphone displays look washed out in comparison, and OLED tech leaves IPS in the dust when it comes to contrast, richness of colour and response times.
Sadly pointlessly high resolutions look better on paper than response times and colour gamut figures.
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I think Apple products are great and easy to use with everything being under one roof. But I hate being held to ransom by 'Itunes'.
Secondly as mentioned above processing the supped up touch screen will take a fair bit of power. and I can't see Apple adding to the weight to allow a stronger battery.
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... also, I'd like a review of the flying pigs outside my window in dreamland. Thanks.
EDIT: Negged... why exactly? It's not like EG got this excited about the quad-core Transformer Prime for example. Which is one of the tablets getting the resolution above.
EDIT 2: Now not negged... thanks! So EG/ DF... howsabout a review of the Transformer Prime then? I suggest you get it running on a nice big TV too - it looks lovely (and will only cost you £5 for the micro HDMI cable)
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At least you don't have to connect a wire any more. And you don't have to buy content from there at all.
"I can't see Apple adding to the weight to allow a stronger battery."
I can't see them crippling the battery life it has now, so I'm interested to see what the compromise will be, or if there'll be one at all.
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I work with someone who still doesn't see the point in HDTV & Blu-Ray.
He's never watched a Blu-Ray on an HDTV before. It's a case of 'once you've been there...".
(and what Dan13l said)
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That'll be a very similar CPU to the one in Playstation Vita (without dedicated VRAM), and not much different than a Tegra 3 (but with a better GPU). Apple have been keeping fairly well in-step with the mobile device power arms race so far, and I doubt this iteration will be any different.
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having said that - first time I've even thought about buying apple...
win 8 out soon...
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I dont see the point in bluray. download is the way forward.
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Love my Ipad.
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Want one.
It's a damn shame that Sony couldn't take one of these and combine it with a PSVita, with Android instead of iOS running the show.
*sigh*
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Lol.
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I'd much rather have pixel response times 20 times shorter and actual blacks in all games rather than some being in a non-native resolution.
@scoop
Resolution is like frame rate in that there are diminishing returns until eyes cannot physically tell the difference. It's why 60fps has become the standard.
You're being facetious about your BD remark but there are plenty of people who genuinely struggle to tell the difference between 720p and 1080p. Heck, how many people never realized that Call of Duty doesn't run at a true HD resolution until someone confirmed it with pixel counting?
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We are presumably about 4 weeks from release so there must be hundreds of thousands of units fully produced.
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BTW, Won't this cause video upscaling errors? I can imagine the picture quality would degrade.
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I've yet to even see an apple product or store and I only eat oranges.
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You'll have to wait for the 3S for that...
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It's 2:1 of the existing res so no there'd be no issues... quality degredation, no idea what you mean.
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I think they know that now, they have hit the highest resolution worth having at the given size. There is no longer any point in increase resolution, now performance is the next area to improve on.
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If they are upscaled normally, they'd look EXACTLY the same as before.. a 2x2 pixel at the new res will look the same as a 1x1 pixel on the previous one.
But i imagine they'd be upscaled with bilinear filtering, so they WILL look better than the original.
Now same with the iphone 4, devs will change their apps to render to the new res natively with a update... However, i really doubt that anything but the most simplest of apps (stuff like angry birds/etc) will work well at the higher resolution - without killing frame rate.
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Also with smart upscaling your movies might seem a bit blurrier (they aren't really, if you think about it they still have the same number of pixels) but should look pretty good, especially HD stuff.
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Viewing experience is based on three main factors:
- Resolution
- Screen size
- Viewing distance (to screen)
The DPI number (dots per inch) on this screen is 263, thats extreme.
I doubt that any mobile GPU can deal with that resolution (4x the pixels than ipad2), except the desktop itself everything has to be scaled up I guess.
Maybe the games on the iPad are so low-end that resolution is not a critical factor, I don't know.
I'm curious to hear from the marketing guys..., but I seriously have no idea how this setup could be useful or beneficial, but a limitation like this hasn't stopped people from buying gadgets so far...
Watching an internet video (non-Flash
Maybe, when the next Olympic Games will take place in London, people will fetch the ipad3 again to watch the live streams on a mobile device with appropriate resolution. BTW, I'm not talking about the 2012 Games...
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They'll tell you.
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As for those going on about Apple holding stuff back so they can scam you next year... get a life and get some logic, no one is forcing anyone to buy it, and just because in your head you think all people who buy Apple are misguided brainwashed idiots who would buy a new one every year doesn't actually make this the truth. And for those that do then for them it is clear that Apple products offer them everything they want, and more, and plus they can sell their 'old' Apple device for a premium so the upgrade cost is minimal. Trust me, no one buys more shit if the first time round they got burnt by it. Thing is, if that's what they want to do with their money then so be it. There's probably the same people here moaning about Apple who feel the desire to upgrade their graphics card every year or two to the latest model, for similar amounts as an iPad costs. Get some perspective and get off your high horse seemingly knowing everything there is to know when half of you are so skeptical and unwilling to give anyone the benefit of the doubt that you have to keep peddling your assumptions and castigating others, and haven't even touched an iPad or iPhone, haven't seen a retina display up close so make your so casual remarks that it simply doesn't matter (yet at the same time make the comment that your Android tablet wipes the floor with the iPad cos it has a faster processor.. ffs!)
Arghhh go fuck yourselves
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I'm looking forward to the new Transformer Prime with 1920 x 1200
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What we'll really see: a retardedly high resolution that exceeds that of a 24" desktop monitor. A faster CPU that won't really be used except maybe by two games. And probably Siri, even though there's nothing holding it back form running on older hardware. That's probably it. It doesn't matter what the 'exciting' processor is if functionality is still in iPod Touch territory.
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This would be my first tablet! Can't wait for the big unveil!!
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edit: I suppose 1024x768 is a bit crap so they wanted something higher, and this is the next resolution up where they can maintain compatibility with existing apps by simple pixel-doubling instead of some more complex filtering. Given that more powerful machines like ps3 and xbox360 struggle to keep a full 720p going, I doubt many apps will actually run at full res, but it will give some apps (Apples ones I suppose) the opportunity to look a bit nicer.
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In fact, an increased resolution actually has the biggest chance of breaking compatibility with existing apps, because they might be hard-coded to scale well to a maximum resolution equal to that of the iPad2.
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Oooh yeah "fuckwits", you sure showed those people-who-bought-a-product-you're-not-really-interested-in.
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On a portable platform? Wow - the 90's was better than i remember...
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Seems to me that development costs are just going rise, as they did for PC and home console, to the point that business isn't viable for the vast number of current iOS/Android developers. Could be the beginning of the end for the current "wild west" on the app stores. Not that I think the market will die: I think it will drastically shrink, the race to zero will reverse and games will typically cost more to play (whether that's up front or through in game item purchase).
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It's not as if people making serious performance games are unused to post-process upscaling, at least if they're making PS3 games if all the digital foundry comparison articles are to go by.
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Matching or passing current console power in a tablet does not suddenly mean the death of console gaming. Most developers' move to tablet/smartphone gaming is nothing to do with hardware and everything to do with low development friction/barrier to entry, simplicity of business models and size of addressable market.
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True, but no matter what the resolution you'll still get eye strain after extended reading. As I understand it, the main reason e-ink displays are so much more comfortable to read on is because they're not shining bright light out at your eyes all the time.
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Historically Mac monitors were 72DPI (or PPI pixels per inch) and Windows was 96ppi but in more recent times screens with higher pixel density (such as 103ppi on the monitor I am using now) have become common.
The iPhone 4 introduced a "retina display" at 326DPI which is on the cusp of pixel density a human eye can differentiate at reading distance, they achieved this by doubling the DPI/PPI of previous iPhones. It looks like they are doing the same with iPad, and as well as the physical evidence (and LG's CEO demonstrating the screens a while ago, and saying Apple were a customer) their SDKs have had double resolution graphics in for a while.
But where this is getting interesting is the latest builds of OSX contain graphics for double density screens for computers too, similarly Windows 8 has support for high density screens, so it's looking like we might see laptops and desktop screens with "retina displays" too in the not too distant future. Moreover, there's evidence from Asia that the forthcoming Ivy Bridges updates to MacBook Pro 15-inch model include a 2880x1800 screen and a 17-inch model with a 3840x2400 screen.
Might we see a 30-inch desktop display with 200DPI double density at 5120x3200 in the next couple of year? (Panasonic recently demoed 200DPI 20-inch desktop monitors). I hope so, but boy would it kill graphics cards rendering at that resolution.
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They mostly differ from other game companies by not being a game company
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There really does appear to be a lot of people here that want an iPad with doubled resolution, despite the extra memory, bandwidth and battery consumption that this means. Are webpages on the current models unreadable or something? Does it resemble Teletext to you?
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Like I said above about paper, these resolutions are NOT ABOUT GAMES. It's only in the current HD console years that running games at native monitor resolutions became a thing. Back in the day people thought nothing of graphics processing intensive apps like games running at 640*480 on monitors capable of 1280*1024 or even higher.
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Back in the day (e.g. mid 1990s) I always had the highest resolutions monitors available (Sony Trinitron screens usually) running games at native resolution (usually with hacking their INI files) and high refresh rates. e.g. I used to run Half-Life Deathmatch at 1600x1200 at 180fps @ 180Hz — but previous to that always preferred resolution and never ran 640x480 on a 1280x1024 capable monitor.
Obsessions with resolution pre-date "the current HD consoles".
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There may be such a thing as the best of both worlds, but I find polygon models look rubbish if the screen resolution is so high, you can see the facets and the blurred pixels making up the textures. With R-Type Dimensions for example, the 3D models aren't really good enough for the HD mode, so I play it with the retro filter that takes the resolution back down to that of the arcade original. And that knocks out all the ugly corners and straight lines of the 3D models that shouldn't be there.
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I've recently swapped from PC gaming on 2560x1600 30-inch monitor to using a 1080p 37-inch television instead, lower resolution but cranking up the AA.
Looks great and I prefer it.
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Anyone who negs me, doesn't have a sense of humour
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Text will be pretty sharp thou'!
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2048x1536 what the hell is that.
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I still say this is going to be the iPad 2S.
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