3D formats explained ( and help of choosing a 3d TV - active/passive ) - AVS Forum
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post #1 of 7 Old 08-06-2012, 03:43 AM - Thread Starter
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Hello,



I am thinking of venturing in the 3d real, as there is some content I'd like to experience in 3D ( mostly documentaries but also movies ).


My biggest confusion: How do Bluray discs come nowadays ( Side By Side or Anaglyph or etc. )?

I am thinking about getting a Panasonic active 3d plasma ( VT 50 or GT 50 ). I don't mind heavier glasses, as I wouldn't be watching 3D more than 3-4 hours a week.

The reason I'd like to get an Active 3D is because of the better 3D image quality compared to passive. Now there is some stuff unclear here:

1) Side By Side means 540p per eye. I know how this format looks ( screen split in half and compressed together ).

2) What is the other version of 3D? I went to a local Best Buy and it was playing 3D scenes from Hugo ( it was NOT SIDE by SIDE ). Image looked "blurry" without glasses ( anaglyph like ). Seemed to be in full resolution. However it looked rather blurry and fuzzy with the glasses on ( I supposed non-animated movies don't look so good in 3D ). It's like I was watching a SD movie not HD. I did not get the chance to see an animated movie in 3D ( Chance of Meatballs, Tangled, Avatar, etc. ) This was an LG 55" LM7600.


3) Do 3d Blurays come in Side By Side , or would that a different "format"?



I'm looking at some 3D Torrents, they all seem to be Side by Side.



When watching a Side By Side movie, on an active 3d TV, the image will look the same as passive? I mean it's 540p.
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post #2 of 7 Old 08-06-2012, 06:22 AM
 
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3D BDs use Frame Packed. Two 1920x1080 images (one per eye) per "master frame" with 24 "master frames" per second.

With active shutter glasses, you will see full 1080P per eye.
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post #3 of 7 Old 08-06-2012, 10:24 AM
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The LG set you looked at was a passive set. Should not have been blury but maybe a little jaged if you were too close. Hugo Blu-ray is frame packed but a passive set only is 580 per eye ( big debate here I think they look as good as Active). you should look at an active set but most store displays are setup poorly and are not a good example of what these sets can do ( not the stores fault but the manufacters that setup and calibrate the displays).

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post #4 of 7 Old 08-06-2012, 03:06 PM - Thread Starter
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Thanks for the replies.


1) So can a passive set play frame packed ( master frames ) bluray 3d?

and

2) Can an active set play side by side blurays?



Problem with local shop was, that only the LG worked. The other demos were broken or were playing different content ( not Hugo ), so I was unable to compare.
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post #5 of 7 Old 08-06-2012, 04:07 PM
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Both can play both. Most side by side (top bottom) content comes from cable/Sat or HTPC with internet content. All blu-ray true 3D is frame seq

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post #6 of 7 Old 08-07-2012, 09:33 AM
 
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Frame Packed 3D BD:

Blu-ray-3D-signal420.jpg

SbS 3D - usually 1080i

410comin3d_talk.jpg

Top/Bottom 3D - usually 720P

Topbottom.jpg
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post #7 of 7 Old 08-10-2012, 06:32 PM
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Passive and Active are the same in terms of compatibility with content. They both support the most common formats. Except that passive can also do interlaced 3D, which is supported by PC software like Youtube, Stereoscopic Player and StereoPhoto Maker. With Active, you normally have to put the TV in side-by-side mode and put the Youtube video in fullscreen side-by-side. With passive you can obviously do the same, or you can tell supported software to play interlaced, which makes it possible to display the 3D in a window or fullscreen, without distorting your desktop. It also gets you around the requirement of having to activating and deactivating 3D mode on the TV menu- just put the glasses on and take them off, it's as effortless as anaglyph glasses.

The main differences between Active and Passive are in the glasses tech and the display panel and how they affect picture quality, eye health, and thickness of your wallet. Passive is not as sharp in terms of screen resolution and the TV needs to be at eye level to reduce crosstalk.

I prefer Passive to Active Shutter though, because Passive glasses have zero flicker, block less light, typically weigh less, cost 1/100th of what Active costs, and they're just easier to operate. Oh, and you can get clip-ons for people who already wear glasses.

Go take a couple trips to stores and look for the downsides of each tech. Remember though that the "pop" factor varies with the content, so don't judge the 3D volume. If you do suspect something else at play, enter the 3D settings and make sure the depth or focus slider is at default. This affects depth/pop and people go into stores and mess with this setting without understanding its impact.

Hope I've been of some help to you smile.gif

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A movie with good 3D does not necessarily equal a good 3D movie!

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