3dtv

[fcukcov]

having seen a bit of 3d sport as part of an advertisement when i was at the cinema last night, I must admit its very impressive. However that was on a large screen so I don't know if it would be as good in the home.

Also according to this sky are launching their 3d channel on the 3rd April-seems a bit pointless though as nobody will have a 3d tv but the pubs!

The 3d channel is being lauched specifically for the manure cheslki game so pubs will be the main market for this.

 

[Durham Fox]

The 3d channel is being lauched specifically for the manure cheslki game so pubs will be the main market for this.

The only market. The 3rd April launch is not for private subscribers.

 

[fcukcov]

The only market. The 3rd April launch is not for private subscribers.

I thought that was the case.

 

[Joe_Fox]

Do you have to wear the 3-d glasses to watch it?

 

[fcukcov]

Do you have to wear the 3-d glasses to watch it?

Yes.

 

[GazLCFC]

I'm sure I'm missing something and am happy to be laughed at but why can't a normal tv display 3D. From my limited knowlege, isn't it how it is filmed (from the two positions) and not the projection to screen that makes the difference?
Have cinemas needed to replace their screens to show movies and sport?

 

[Macky]

I'm sure I'm missing something and am happy to be laughed at but why can't a normal tv display 3D.

It can, depending on the type of 3D technology being used.

Have cinemas needed to replace their screens to show movies and sport?

No. The projector is specific to the type of 3D being used

 

[fcukcov]

As i understand it any tv/cinema screen can show recorded 3d programs but for the live stuff you need a special projector/tv.

 

[Matt_B]

Let me try to explain:

There are currently two different types of 3D in mainstream use, the traditional Cyan/Red and the new Real3D stuff at the cinema.

Both work on the same principal. Your eyes both see different images, which are then merged by your brain to create an image with depth.

In 3D cinema/tv/still pictures the idea is to take an image of a scene at positions that are similar to the eyes, so there are two cameras seperated by a couple of inches (this can vary, but for now it will do). This will record images that are more or less the same as your left eye and your right eye.

That is all that is required extra at the recording stage.

The trick than comes at the display stage. The idea is to show only the left image to your left eye and the right image to your right eye. In the classic cyan/red images this was done with colour. By making one image entirely cyan within the image and one image entirely red, and then placing a red filter in front of the relevant eye and cyan in the other you can ensure that the left eye only sees the left image and visa versa.

To replicate this on TV requires no extra purchases, other than a pair of Cyan/Red glasses, they used this with the DVD of Journey To The Centre Of The Earth.

The main problem with this method is that you cannot have an image that contains any blue, green or red otherwise it will appear to the wrong eye and throw off the 3D, so most images are very dull.

The new method gets around this by using light polorisation. If you don't know what that is, it basically means that as light travels the waves are moving in a plane. Imagine light being giant flat plains of light, almost like pieces of paper. You can manipulate light and make sure that it moves horizontally or vertically, and that is the basis for the newer technology. The left image is filtered so that the light moves in one direction and the right image the other direction. The glasses you wear are then effectively filters that only either allow horizontal or vertical, so that again your eyes only see the correct image. Because any colour of light can be manipulated to travel in a direction it means that full colour images can be shown in 3D.

Taking it back to why you need a new TV, your current TV is not capable of producing light that is polorised in a certain direction. The new TVs will do that. The other option is that you can get special glasses that have shutters in front of each eye that open and close in time with the image on the TV so that it syncs up, but this isn't compatible with any but the most expensive LCDs/Plasmas.

There is no way currently that all of this can be done without glasses on a large TV scale. If anybody saw a recent Top Gear where they had a sat nav screen in the car that showed as Sat Nav to the driver and a DVD player to the passenger, this technology could be used to show different images to each eye without glasses, but would only work up to about a 10" screen and your position would need to be dead center.

I hope that explains it all!

 

[GazLCFC]

Thanks all.

 

[drummindefender]

Noticed sky 3d channel is now up showing previews-worked the other day (showed the same image twice on the screen split down the middle on our non 3dtv) but now you have to call them up to get it or summit.

 

[fcukcov]

I watched the secodn half of the manure v chelski match and it was ok. The first hlaf didn't work. Overall its nothing special. certainly not gonna spen 1600-1800 quid on a telly for it yet.

 

[fcukcov]

They trialled a different camera angle for the manure v Blackburn game on Sunday. The camera was down at pitch level which overcame the problem of the 3d not working very well when the camera was high in the stand in the traditional manner. However it is very odd to watch football from that angle but it did give the game more depth.