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Why do 3D films on DVD need a special player?


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Old 14-09-2012, 10:27
Chris James
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I'm sure the answer is blindingly obvious, but I have recorded a load of stuff during the Olympics in 3D. When it is played back on a TV you get two pictures side by side until you activate the 3D mode - then it becomes one fuzzy picture - then you put on those glasses!

So why cannot 3D films be made the same way, so that they appear to be two pictures side by side unless you have a 3D TV? Why do you have to buy a 3D DVD player???
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Old 14-09-2012, 10:53
emptybox
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Although it would be technically possible for film companies to release films in that format, on ordinary Blu-ray discs, to play in ordinary Blu-ray players (not DVD players), that way of producing a 3D picture does not give you full HD resolution, as you've got 2 side by side pictures over the 1920 horizontal resolution.

3D Blu-rays on the other hand do (I presume?) give you Full HD 3D.
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Old 14-09-2012, 11:37
Nigel Goodwin
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So why cannot 3D films be made the same way, so that they appear to be two pictures side by side unless you have a 3D TV?
They could, but it's better quality the way BD 3D works, giving full resolution.
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Old 14-09-2012, 12:06
grahamlthompson
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Although it would be technically possible for film companies to release films in that format, on ordinary Blu-ray discs, to play in ordinary Blu-ray players (not DVD players), that way of producing a 3D picture does not give you full HD resolution, as you've got 2 side by side pictures over the 1920 horizontal resolution.

3D Blu-rays on the other hand do (I presume?) give you Full HD 3D.
You presume correctly each eyes image is from a full 1920 x 1080 frame at least on a active glasses 3D TV.
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Old 14-09-2012, 12:08
Robert__law
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I have recorded 3D programs and also my own 3D footage on to DVD and played it back in 3D on my 3D TV

The 3D Blue ray player has the 3D software built into it

I think it should be possible to play back a 3 D Blue ray disk in an ordinary blue ray player and manually turn on the 3D software on the TV
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Old 14-09-2012, 13:28
Nigel Goodwin
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I think it should be possible to play back a 3 D Blue ray disk in an ordinary blue ray player and manually turn on the 3D software on the TV
How could it be?, the BD player can't output the required format (double the number of frames of a DB player).

If you recorded your own 'side by side' 3D BD, then the TV would be able to display it in 3D, just as with Sky 3D.
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Old 14-09-2012, 13:37
grahamlthompson
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I have recorded 3D programs and also my own 3D footage on to DVD and played it back in 3D on my 3D TV

The 3D Blue ray player has the 3D software built into it

I think it should be possible to play back a 3 D Blue ray disk in an ordinary blue ray player and manually turn on the 3D software on the TV
Side by Side squashes both frames into a single 1920 x 1080 image so each one contains only 960 x 1080 pixels. As the transmission is otherwise bog standard any HD recording kit can record it. The TV expands each 960 x 1080 image to 1920 x 1080. You can burn SBS recordings to a DVD blank using AVCHD and a normal BD player will play back the SBS images, it's the TV that sorts it out not the player.

Bluray is different, it has the capacity to store both images at 1920 x 1080 and transmit them at 48fps (2 x 24fps). A normal BD player won't work.
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Old 14-09-2012, 16:37
Chris James
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Thanks guys, it's resolution then. However I am sure the opening ceremony recorded from BBC HD in 3D looks much better than standard definition and is very near to full HD quality.when I view it. I am going to start a campaign for BluRay 3D films to be released in a side-by-side format because having bought an expensive Panasonic BluRay recorder a year or so ago, I do not want a second DVD player!
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Old 14-09-2012, 16:42
Nigel Goodwin
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Thanks guys, it's resolution then. However I am sure the opening ceremony recorded from BBC HD in 3D looks much better than standard definition and is very near to full HD quality.when I view it.
It's still HD, just that the horizontal resolution is split between the two eyes - it's not really very much different to 3D from BD as far as perceived resolution goes.
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Old 16-09-2012, 11:23
spiney2
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basically its that 3d delivery uses 2 separate picture streams. instead of the 3d extension mode orignally planned for standard mpeg.
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