Forums > General Discussion   Shooting the breeze...

D.I.Y 3D TV

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Created by choco > 9 months ago, 28 Jun 2010
choco
SA, 4032 posts
28 Jun 2010 4:59PM
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Don't go wasting money on upgrading your current set for a 3D TV, easy to do yourself, checkout my effort

Cassa
WA, 1305 posts
28 Jun 2010 5:34PM
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lol , very nice

evlPanda
NSW, 9202 posts
28 Jun 2010 8:14PM
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On a related note has anyone ehcekd out 3D tv? I saw a demo in Sony store, didn't like too much. There's something not quite right about it, and I foudn myself finding the 2D sets next to them looking crisper.

pweedas
WA, 4642 posts
29 Jun 2010 12:03AM
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evlPanda said...

On a related note has anyone ehcekd out 3D tv? I saw a demo in Sony store, didn't like too much. There's something not quite right about it, and I foudn myself finding the 2D sets next to them looking crisper.


I ehcekd them out a couple of times in two different shops.
After I saw Avatar in 3D i decided that as soon as 3 D tvs came out I would be off to buy one. So when I saw them advertised for $4500 including a 3D DVD player thrown in, I was off to get one,.. but, after looking at them and getting all enthused, when I asked what DVDs were available to play in 3D, the answer was NONE!
Not even Avatar, which was a bit of a surprise because I thought since it was a 3D movie available on blu ray it would be available in 3D.
Anyway, it isn't and neither is anything else.
The world cup is in 3D but so far that's pretty much it, so there's not much point in having a 3D tv just yet.

The reason the picture doesn't look quite as crisp is because it isn't quite as crisp.

And the reason for that is because there are two different pictures presented on alternate screens taken from two slightly different angles.
Without the special glasses the image is thus quite blurred on the edges because the two pictures are not the same.
When you look at it through the special glasses, the glasses syncronise with the flashing of the screen and alternately blocks the left eye, right eye, left, right, left, right, etc image so you are only seeing one image at a time with one eye at a time.
The brain is a bit slow at detecting this fast flash rate so it just assumes the two pictures are coming at the same time and are the same image from two different angles, i.e. 3D.
However, it also means that only half the image brightness is being seen because each eye is blanked off for half of the time.
Half sounds like a lot but in fact because of the way the eye is sensitive to light, the loss is barely noticeable.
Your ears work the same way. A half power drop is barely noticable. Pretty amazing eh?

After about 5 minutes you are totally unaware that the image is any different from normal.
The other problem is the requirement to wear a very uncool set of battery powered special glasses which you would certainly not be wearing around the house. So if you intend to watch something in 3D you have to sort of make the decision that you are going to watch a 3D program, put on the glasses and sit down and watch.

Mostly, I don't intend to watch anything. The tv is on all the time and I just look over and see something interesting and then get sucked in.

I suppose it could still work that way because the 3D sets do a very good 2D normal picture, so you would normally run it in 2D and then if you got sucked in to anything really good, you could just put on the Joe Uncool sunnies and switch to 3D.
All up I think they will still be a pretty good gadget when there is some 3D content available.

choco
SA, 4032 posts
29 Jun 2010 8:55AM
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by Stephen Scott;

Myth #1: You don't need two TVs! Blame it on poor advertising by the manufacturers, but some people believe that 3D TVs can only display 3D. Not true. 3D TVs just happen to be the top-of-the-line Plasma and LED TVs in the range - they need to be to have the refresh rate to display left & right images so quickly that they eye can't discern it without glasses. And trust us on this, the Full High Definition 1,080p images on these sets when they're not in 3D mode are fantastic!

Myth #2: You need special glasses. OK, this one's actually true. The agreed standard by the industry is to use Active Shutter Glasses - a fancy name for a simple concept. These powered glasses alternately allow each eye to see a different image. The images on screen refresh in time with the glasses so you can view the 3D image. The good news is that most sets are coming with free sets of glasses, and most are rechargeable. The bad news is that while the industry has agreed upon a standard for showing, the glasses are a different matter, and most don't appear interchangeable between models (so Samsung glasses won't work on Panasonic sets).

Myth #3: 3D glasses cause headaches. There have been few (if any) reports of people finding the Active Shutter Glasses uncomfortable. While some complaints are justified (there’s a small percent of people the glasses don’t work on), most are psychosomatic, as the glasses are essentially just filtering light at high speed. You might feel a little geeky when you first put them on, but after watching for a while you forget you’re wearing them. And you only need to wear them while watching in 3D mode.

Myth #4: I need new cables and AV components. Slightly true. Most high speed HDMI 1.3 cables can actually handle the signal required for 3D, and the new 1.4 versions will definitely carry the signal correctly (special note – HDMI are changing their names shortly, so be sure you buy High Speed or High Speed with Ethernet). On the hardware side, to play a 3D Blu-Ray you either need a PlayStation 3 (with firmware upgrade) or a new 3D compatible Blu-Ray Player – be sure to keep your eye out for firmware upgrades for these as there will be constant improvements. If hooked through an AV Receiver, then you’ll also need to upgrade to one of the newer models due out in the second half of the year. Again, this is due to them not able to currently process the data required to display 2 images at once.

Myth #5: 3D TVs are too expensive. Here’s a big one busted – the 3D models are just the top-of-the-line TVs in each range. When compared to last year’s models, they’re around the same price. Yet you’re now getting 3D thrown in for free! And think about it, when Plasmas, LCD & now LEDs first launched, people ridiculed the idea as they cost too much. Now they’re everywhere. Give it a few years and we predict it will be close on impossible to buy a TV without 3D.

Myth #6: What’s the point? There’s no content! Hard to argue this, except if you’re a footy fan you won't use this argument after watching the State of Origin. It’s currently being repeated on Channel 31 (the assigned channel for 3D in Australia), and if you’re curious then pop in and watch some of it. The depth is incredible, and at one point we all thought it was raining in the showroom. With a surround sound system, you’ll almost feel like you’re part of the crowd. And what did that guy once say? “If you build it they will come”? There’s over 60 films in development that are being shot in 3D, not to mention the recently released Toy Story 3, Shrek Forever After, How to Train Your Dragon, and a little one you might have missed called Avatar. And let’s not get started on the gaming potential: already around the corner are the long-awaited Gran Turismo 5 and Tron Evolution.

Myth #7: My TV is “3D Ready” – do I need a new set? This one is yet to be finalised, as some models (eg Mitsubishi) use a different system to the agreed standard (checkerboard vs frame stacking). However there have been announcements regarding adapter devices being released, so best to check with the manufacturer whether your set is compatible with the new standard.

Sailhack
VIC, 5000 posts
29 Jun 2010 9:48AM
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Stephen Scott’s Experience
Marketing Manager
Aussie Hi Fi
(Marketing and Advertising industry) !!!


Try lying down on a couch & watch 3d TV with your 'special' glasses on - doesn't work obviously. If I want to kick back & watch telly or a movie, I don't want to have to concentrate on having my eyes horizontally aligned to get the effect.

evlPanda
NSW, 9202 posts
29 Jun 2010 10:05AM
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pweedas said...

evlPanda said...

On a related note has anyone ehcekd out 3D tv? I saw a demo in Sony store, didn't like too much. There's something not quite right about it, and I foudn myself finding the 2D sets next to them looking crisper.



The reason the picture doesn't look quite as crisp is because it isn't quite as crisp.

And the reason for that is because... [explanation]


I know. But it still looks slightly ****. I noticed in Avatar too, I kept adjusting my glasses every 10 minutes to see if I could fix it. The final image, to me, is 95% sharp.

Perhaps it is the fact that you can't focus on what you are looking at, unless the camera has too. For example you are enjoying the soccer in 3D but when you look at the crowd it is all blurry. Same in 2D, but blur is more annoying in 3D, unnoticeable in 2D (or perhaps we are used to it). I find it especially annoying around the edges.

Also 3D slightly nauseating.

Also I'm not sure how 3D will transfer to quality cinema. Many scenes are shot with the focal range very much in mind. The director directs your eye by using focus. Again the sensation will be/is like you can't focus properly.

Also the screens are 50% darker.

Also I don't know what the hell you need a 3D TV for. You need the glasses and a player that will sync the images it is pumping out (to the TV) with the glasses. I don't get the TV part. In theory you don't need the TV at all. Cinemas certainly didn't install 3D screens, did they.

I actually had 3D LCD glasses on my PC back in ...1996. Worked the same way and worked with most games (Direct X or Open GL, I forget) out of the box. Had a 100hz monitor at the time so it was similar to what these 3D TVs do now. It was pretty good for games, I must admit, but the fact is I used them for about 6 months and forgot about them until now.

Short version: You can't focus on what you want/depth of field issues, there is still some double image effect, image is 50% darker, slightly nauseating (I'd had two coffees prior the demo), had it in '96 and don't miss it.

Side-by-side I found I somewhat preferred the 2D TVs, if I removed the "new" factor.

mathew
QLD, 2045 posts
29 Jun 2010 10:24AM
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The facts... are and arn't... sort of...

This thread was good until the chemtrails fans got on to it.


The advertisers never said you need two TV's... maybe if making such a claim, some evidence of such advertising would be appropriate. Otherwise, that just the rumour mill getting its word out again.

You dont need "active glasses"... Avatar didn't need them -> the technology is called circular polarisation (www.reald.com/). Old school Green/Red still works for 3D, it didn't magically disappear. Other tech exists which doesn't require any glasses: www.3d-tvbuyingguide.com/3dtv/microsoft-3d.html

You do get headaches if the shutter rate is too slow -> shutter technology was available in the mid 90's, but the shutter speed was slow and the resolution was too low. You can also get headaches using Green/Red, as the technique requires you head exactly vertical - being slightly tilted does weird things with your brain. Since 3D vision is relatively new to the masses, we wont see the true effects for many years eg: hardware.slashdot.org/story/10/06/26/2059205/3D-Displays-May-Be-Hazardous-To-Young-Children

Obviously you need latest tech in cables, to support the highest resolution displays + 3D.

The good (shutter glasses or circular polarization) 3D TV's need at least 140Hz refresh rate to get above the flicker rate detectable by most of the population - some people need a higher rate. High-end TV's have previously had refresh rates around 100-120 Hz -> they needed an upgrade to handle the faster refresh rates. So it is true that 3D TV's are just high-end 2D TV's, but the classification of "high-end" is a moving target.

Its true that there isn't much content and that there isn't standardised 3D tech. Eventually there will be, until then dont be the guy who got suckered in to buying HD-DVD, Beta, etc.

Carantoc
WA, 6658 posts
29 Jun 2010 8:29AM
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Check out my effort:

It is called a 'window'

Next to it is a 'door'

You can use the 'door' to actually interact in real time with the 3D images you can see through the 'window'.

Awesome or what ??

No upgrades needed to hardware, possibly slight upgraded needed to software in some people's heads ?

mattyjee
WA, 575 posts
29 Jun 2010 10:09AM
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I hate 3D TV I hope it dies again like it has before.

It looks like ****. It hurts my eyes. Try watching a fast scene in HD, its just a blur.

If you want to watch rugby and soccer in 3D then try attending a real game, and f*** off so that channel 9 doesnt have to keep showing these stupid low-panning camera angles to enhance the 3d effect.

getfunky
WA, 4485 posts
29 Jun 2010 11:30AM
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Totally agree Mr G.

Now that everyone (pretty much) has signed up for plasma, then LCD, then LCD/LED it's time to somehow make them feel like they need some new news and need to reach deep into thepockets again.

Hey - they do offer something new but is +$4k worth it for the occasional 3 D viewing experience? Myeh.. probably not. Kinda the same for Blue ray, yeh it is slightly better but no massive improvement on standard DVD (not 3x better as initial pricing was).

I'd be waiting a couple of generations at least before taking the plunge on what is essentially a marketing gimmick. But I have no plans at all to sign up for 3D in the future as I just don't find it spesh at all. Never say never tho.

What I'd like is for the focus (no pun intended) in movie making to return to quality scripting, acting and real vision not cardboard cutout peformances all on a blue/green set with a story a 10 yr old would be embarrassed to produce.

Saw Toy story 3 yesterday (in 2D as my kids - and I - don't really enjoy 3D, its' fatigueing) and the quality of plot/storylines in all 3 of those movies leave 90% of movies for adults sadly lacking. Sure they have produced a 3D version too, as it would be commercial suicide not to in the current trend, but whatever version you see the story is kn great.

If you look at a dog turj in 3 dimensions is it suddenly interesting?

Can't wait for smellivision.

pweedas
WA, 4642 posts
29 Jun 2010 12:14PM
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mathew said...

The facts... are and arn't... sort of...


You dont need "active glasses"... Avatar didn't need them -> the technology is called circular polarisation (www.reald.com/). Old school Green/Red still works for 3D, it didn't magically disappear. Other tech exists which doesn't require any glasses: www.3d-tvbuyingguide.com/3dtv/microsoft-3d.html



I think the technology used to create 3D at the cinema is different from that which is used to create 3D on a tv.
The cinema 3D is created by polarising the projected light in two different planes. This is done in the projector room, not on the screen. Thus the glasses do not need to be active. One side passes vertically polarised light and the other horizontal.

TV sets can't use this system because the backilght for the image is the same for all images. If this could be changed to have alternately polarised backlight then the two systems could be made the same and then active glasses would not be necessary.
The other posibility would be to have the LCD screen filter the backlight so that each alternate screen only passed vertically and then horizontally polarised light.
I think they have played around with this but the cost goes up a lot because it requires all new technology on the expensive part of the tv set. i.e. the LCD screen. They might eventually go that way if a cheaper way can be found to do it.

There has been a lot of money spent on finding a way to create 3D for general use in tv. The present system is obviously not perfect but at this point it is about as good as it gets within the confines of the present technology and cost restrictions.
With no cost restrictions a better system could be made but then who would they sell it to?

Back in the early 70s when colour tv first came to Australia, there was a bit of a push in technical circles to switch then to digital tv.
The idea was good because we were just beginning to realise what could be done with digital technology. Unfortunately it came to nothing at that time because of the cost.
It could have been done but then very few people could have afforded to buy it.
Finally, 40 years later we can do it cheaply so today we have it.

3d tv is today in a similar situation. We have to go with the option which will be cheap enough to get mass acceptance.


pweedas
WA, 4642 posts
29 Jun 2010 12:18PM
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getfunky said...

If you look at a dog turj in 3 dimensions is it suddenly interesting?





Depends what's in it I spose.

pweedas
WA, 4642 posts
29 Jun 2010 4:13PM
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Carantoc said...

Check out my effort:

It is called a 'window'

Next to it is a 'door'

You can use the 'door' to actually interact in real time with the 3D images you can see through the 'window'.

Awesome or what ??

No upgrades needed to hardware, possibly slight upgraded needed to software in some people's heads ?


My hardware needs upgrading.
It's old and nearly worn out.
Maybe a good de-fragging would help.
Where could I get that done do you think?

nick0
NSW, 510 posts
29 Jun 2010 7:00PM
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3D ...ehh

evlPanda
NSW, 9202 posts
29 Jun 2010 7:32PM
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Carantoc said...

Check out my effort:

It is called a 'window'

Next to it is a 'door'

You can use the 'door' to actually interact in real time with the 3D images you can see through the 'window'.

Awesome or what ??

No upgrades needed to hardware, possibly slight upgraded needed to software in some people's heads ?


I put on my 3D glasses before I went out this 'door', into a 3D world. 3D x 3D.
Ladies and gentlemen, I have been through the looking glass.



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Forums > General Discussion   Shooting the breeze...


"D.I.Y 3D TV" started by choco