Digital Spy

Search Digital Spy
 

DS Forums

 
 

Active / Passive 3D


Reply
Thread Tools Search this Thread
Old 20-02-2013, 16:05
sps1013
Forum Member
 
Join Date: Jan 2009
Posts: 668

Just been looking at 3D systems and am unsure of Active or Passive.

Which platform (if any) requires you to be directly facing the TV to get the best picture. Whilst in my local TV centre the guy said you didn't have to be directly in line with an Active set to get the best effect whereas with passive you needed to be as best as you can in front of it and not off to one side?

Now, I may be talking hoop but its something that has stuck in my mind.

Ta.
sps1013 is offline   Reply With Quote
Please sign in or register to remove this advertisement.
Old 20-02-2013, 16:16
derek500
Forum Member
 
Join Date: Feb 2002
Posts: 17,734
Passive can be watched from any horizontal angle, but you need to be in line with the screen vertically (i.e as near to eye level. half way up screen).

LG gives up to seven pairs of glasses and we've had six watching at once with no problems.

Active, needs to be as near as straight on as possible.

Many stores push active as they make more money selling expensive glasses.

LG Cinema 3D is IMO the best. I bought my second one recently.

Here's a good LG sales demo.

http://www.youtube.com/watch?v=LOFCRuWN5kg
derek500 is offline   Reply With Quote
Old 20-02-2013, 23:56
Chris Simon
Forum Member
 
Join Date: Mar 2000
Location: Snowdonia
Posts: 2,723
I've just bought an LG passive 3D set which will be arriving on Saturday. I really wanted to stick with Panasonic but they are not doing the exact model that I wanted. Anyway, from demos in store, passive sets lose their 3D if you're out of the vertical plane, for example standing up in front of the set if it's at stomach height and looking down on it. But for normal viewing positions it's perfectly fine, and the salesman is wrong when he said you have to be careful horizontally. I didn't test out the active sets very much, I just can't handle the flicker. You lose half the vertical resolution in 3D mode on a passive set and if you look closely you can see horizontal lines, but again for normal viewing it is not noticeable and the picture is still fantastic. It's far more acceptable to me at any rate than the flickering.
Chris Simon is offline   Reply With Quote
Old 21-02-2013, 01:33
JasonWatkins
Forum Member
 
Join Date: Mar 2003
Posts: 40,648
For what it's worth, I bought a passive 3D set last year. If you're not particularly picky about picture quality, resolution, bit rate and all that gubbins then it's perfectly fine. I've watched a few 3D films since I got it and the 3D effect works very well, even when i'm fidgeting about on the settee and moving here and there.
JasonWatkins is offline Follow this poster on Twitter   Reply With Quote
Old 21-02-2013, 01:37
gemma-the-husky
Forum Member
 
Join Date: Jul 2009
Location: UK
Posts: 12,852
i think the glasses make passive a no brainer.

waiting for the TVs to come down a bit, although I bought a 24" LG I saw cheap fora PC monitor/ occasional 3D screen, and I was amazed how good it was.
gemma-the-husky is offline   Reply With Quote
Old 21-02-2013, 08:17
stevemorg
Forum Member
 
Join Date: Jun 2006
Posts: 139
I have a lg active plasma and also have a lg passive TV and i can say the passive set is the better and the glasses for the passive are so cheap. the glasses for the active set was £70 when i got the set 18 months ago.
stevemorg is offline   Reply With Quote
Old 21-02-2013, 08:26
JasonWatkins
Forum Member
 
Join Date: Mar 2003
Posts: 40,648
i think the glasses make passive a no brainer.
Very true - I got 4 pairs with mine and I also found the Real3D glasses you get at the cinema work just as well, and i've got 3 pairs of those in a drawer somewhere as well. So pretty sorted if i wanted a 3D viewing party .. heh
JasonWatkins is offline Follow this poster on Twitter   Reply With Quote
Old 21-02-2013, 14:05
derek500
Forum Member
 
Join Date: Feb 2002
Posts: 17,734
I've just bought an LG passive 3D set which will be arriving on Saturday. I really wanted to stick with Panasonic but they are not doing the exact model that I wanted. Anyway, from demos in store, passive sets lose their 3D if you're out of the vertical plane, for example standing up in front of the set if it's at stomach height and looking down on it. But for normal viewing positions it's perfectly fine, and the salesman is wrong when he said you have to be careful horizontally. I didn't test out the active sets very much, I just can't handle the flicker. You lose half the vertical resolution in 3D mode on a passive set and if you look closely you can see horizontal lines, but again for normal viewing it is not noticeable and the picture is still fantastic. It's far more acceptable to me at any rate than the flickering.
For what it's worth, I bought a passive 3D set last year. If you're not particularly picky about picture quality, resolution, bit rate and all that gubbins then it's perfectly fine. I've watched a few 3D films since I got it and the 3D effect works very well, even when i'm fidgeting about on the settee and moving here and there.
The LG is fantastic. i rely mainly on Sky for 3D, but the other day I popped into Blockbuster who are having a closing down sale and bought the Hugo 3D blu-ray for £7.

The disc has both 2D and 3D and the clarity and definition is equal. I even tested certain scenes with fine detail (eg newspaper headlines on news stands) and they were the same.

The LG Cinema 3D sets are stunning. Shame the likes of Currys and John Lewis and even Which? push active so much.
derek500 is offline   Reply With Quote
Old 21-02-2013, 21:32
fastest finger
Forum Member
 
Join Date: Aug 2003
Location: Heart of England.
Posts: 6,397
Active 3D has the better viewing angle and higher resolution.

Passive 3D has cheaper glasses, no batteries/charging and no flicker. It's simply easier to use.

Depends which is more important to you.
fastest finger is offline Follow this poster on Twitter   Reply With Quote
Old 21-02-2013, 21:32
sps1013
Forum Member
 
Join Date: Jan 2009
Posts: 668
Thanks for your comments people. I have today purchased an LG55LM760T and wow!! Very impressed.

Just got to figure out the best picture settings now!! If anybody has any tips then please post!!
sps1013 is offline   Reply With Quote
Old 21-02-2013, 22:41
derek500
Forum Member
 
Join Date: Feb 2002
Posts: 17,734
Thanks for your comments people. I have today purchased an LG55LM760T and wow!! Very impressed.

Just got to figure out the best picture settings now!! If anybody has any tips then please post!!
I use these, which were done by someone with the Disney WOW calibration blu-ray. I downloaded some calibration files and made a couple of adjustments.

Setting Expert 1 isf
Backlight 35
Brightness 52 (I changed to 56)
H Sharp. 0
V Sharp 0
Contrast 97 (I changed to 90)
Colour 49
Tint R2

Expert Control
Dynamic Con Off
Super Res. On
Colour Gam BT709
Edge Enh. Off
Colour Fil. Off
Expert Pattern Grayed Out
Gamma 2.2

White Balance
Colour Temp Medium
Method 20 Point IRE
Pattern Outer
IRE 100
Luminance 130
Red 0
Green 0
Blue 0

Colour Management
Green S-10,T0,L13
Blue S1,T0,L20
Magenta S-5,T0,L10
Yellow S-10,T0,L0
Red S10,T20,L0 (I changed to 5, 0, 0)
Cyan S0 T0 L0
Picture Options
Noise Red Off
Mpeg Noise OFF
Black Lev. Low
Real Cin Off (On for Bluray)
Eyecare Off
TruMotion Off (I use user 2)

My set is a 47" LM640T.

If you want to see some stunning 3D, go to 3D World, documentaries and look for Insects Talk.
derek500 is offline   Reply With Quote
Old 21-02-2013, 22:54
derek500
Forum Member
 
Join Date: Feb 2002
Posts: 17,734
Active 3D has the better viewing angle and higher resolution.
Next, while tackling the topic of whether FPR’s “half-resolution” passive 3D provides lower-quality imagery than active 3D, Soneira discovered a surprising result: despite using “just” 540 horizontal lines for each eye, passive 3D still provided “full 1080p” resolution — and better yet, rather unintuitively, passive 3D produces sharper images than active 3D. Soneira gives a complex explanation for why this is so, but it basically boils down to a neurological process called image fusion, or, in other words, “active 3D TVs might sound like they have higher specs, but in practical use, our brains prefer passive 3D.”

Finally, and perhaps most importantly, passive TVs have much better 3D imaging and crosstalk (left/right image separation) characteristics. Using a newfangled statistic called crosstalk ratio, measured using a spectroradiometer, Soneira highlights the baseline 3D imaging quality — passive TVs are about four times better than active TVs — and the swan dive that active 3D takes when you introduce any kind of not-dead-center viewing angle. With passive FPR 3D, you get sharper visuals, a better sense of depth, and, because of the reduced crosstalk, far less brain strain.

Are there any instances when an active-shutter 3D TV is preferable, then? No — and if we take into the account the variety, flexibility (clip-on!), and low cost of passive TV glasses, opting for an active 3D TV really does seem foolish. Both active and passive 3D TVs cost around the same amount, too.
http://www.extremetech.com/electroni...-passive-3d-tv
derek500 is offline   Reply With Quote
Old 21-02-2013, 23:32
BrokenArrow
Forum Member
 
Join Date: Mar 2007
Location: Hampshire
Posts: 15,834
I have a LG 47" passive 3DTV and its brilliant. Came with 8 pairs of glasses.

Get "Despicable Me", its a must buy 3D bluray.
BrokenArrow is offline   Reply With Quote
Old 22-02-2013, 09:12
ironjade
Forum Member
 
Join Date: Nov 2004
Location: London
Posts: 8,323
I have a LG 47" passive 3DTV and its brilliant. Came with 8 pairs of glasses.

Get "Despicable Me", its a must buy 3D bluray.
Me too.
See also "Finding Nemo", "Hugo" and "Dark Country".
ironjade is offline   Reply With Quote
Old 22-02-2013, 17:58
fastest finger
Forum Member
 
Join Date: Aug 2003
Location: Heart of England.
Posts: 6,397
I have no interest in starting some crazy fan-boy war with you, but good grief, there's some rubbish in there.
fastest finger is offline Follow this poster on Twitter   Reply With Quote
Old 22-02-2013, 23:17
late8
Forum Member
 
Join Date: Jul 2005
Posts: 7,032
If you're serious ... Active

If you're just wanting 3D... Passive.


Active is the better system and bullshit aside from those who do LGs dirty work and talk active down it has THE Full HD 3D experience .

Passive gets messy off angle.. Full of crosstalk, reduced resolution and IMO the 3D always looks forced and unnatural.

Passive is great for families and watching during the day but serious film watchers who care about quality should not only look at closer to reference level Plasma but also Active 3D.
late8 is offline   Reply With Quote
Old 22-02-2013, 23:52
Chris Simon
Forum Member
 
Join Date: Mar 2000
Location: Snowdonia
Posts: 2,723
The LG Cinema 3D sets are stunning. Shame the likes of Currys and John Lewis and even Which? push active so much.
This forum needs a Like button!
Chris Simon is offline   Reply With Quote
Old 22-02-2013, 23:56
BrokenArrow
Forum Member
 
Join Date: Mar 2007
Location: Hampshire
Posts: 15,834
If you're serious ... Active

If you're just wanting 3D... Passive.


Active is the better system and bullshit aside from those who do LGs dirty work and talk active down it has THE Full HD 3D experience .

Passive gets messy off angle.. Full of crosstalk, reduced resolution and IMO the 3D always looks forced and unnatural.

Passive is great for families and watching during the day but serious film watchers who care about quality should not only look at closer to reference level Plasma but also Active 3D.
Actually, that's not true. Serious people use passive 3D.

Active 3D is limited to 720p due to HDMI bandwidth limitations (or it was as of 1.4, maybe there's a new revision now). You can get 1080p but only at 25Hz.

Serious gamers prefer passive because it works at the full 60Hz..

Plus, the reports I've seen say that crosstalk and viewing angles are worse with active, so I'm not sure were you got your info from.

I quite willing to be proved wrong though
BrokenArrow is offline   Reply With Quote
Old 23-02-2013, 09:52
late8
Forum Member
 
Join Date: Jul 2005
Posts: 7,032
Actually, that's not true. Serious people use passive 3D.

Active 3D is limited to 720p due to HDMI bandwidth limitations (or it was as of 1.4, maybe there's a new revision now). You can get 1080p but only at 25Hz.

Serious gamers prefer passive because it works at the full 60Hz..

Plus, the reports I've seen say that crosstalk and viewing angles are worse with active, so I'm not sure were you got your info from.

I quite willing to be proved wrong though
Passive crosstalk is more common due to the off angle problems. Couple that with the lower LCD standard of picture and you just add more to the mix.

Also reference level 3D is plasma territory. Better motion resolution, contrast the lot. Due to the drive systems etc plasma uses active.

Where you got 720 from O have no idea. 3D Bluray is what a lot of people will get on a 3D TV and you get 1080 full HD.

Apart from projectors the next thing for critical viewers would be a active large screen plasma.

The LG passives look good at first but its forced and cut out looking. The motion blur and lower motion resolution coupled with the fact it's not full HD all add up.
late8 is offline   Reply With Quote
Old 23-02-2013, 10:06
BrokenArrow
Forum Member
 
Join Date: Mar 2007
Location: Hampshire
Posts: 15,834
Passive crosstalk is more common due to the off angle problems. Couple that with the lower LCD standard of picture and you just add more to the mix.

Also reference level 3D is plasma territory. Better motion resolution, contrast the lot. Due to the drive systems etc plasma uses active.

Where you got 720 from O have no idea. 3D Bluray is what a lot of people will get on a 3D TV and you get 1080 full HD.

Apart from projectors the next thing for critical viewers would be a active large screen plasma.

The LG passives look good at first but its forced and cut out looking. The motion blur and lower motion resolution coupled with the fact it's not full HD all add up.
An FPR-based implementation works at 60 Hz, so a standard HDMI cable has ample bandwidth to enable stereo content. This isn't the case with active systems, which require 120 Hz output to deliver 60 frames to each eye, each second. As a result, using HDMI 1.4, you can only get 60 frames per second at a maximum 720p resolution using shutter-based technology.
http://www.tomshardware.com/reviews/...ew,3242-2.html
BrokenArrow is offline   Reply With Quote
Old 23-02-2013, 10:44
Nigel Goodwin
Forum Member
 
Join Date: Apr 2006
Location: North Derbyshire
Posts: 38,234
Sorry, but that's utter nonsense

Active is better quality than passive, and has higher resolution - the BIG (only?) advantage of passive is the low cost of the glasses.

You pays your money and you takes your choice

Personal I wouldn't bother with either
Nigel Goodwin is offline   Reply With Quote
Old 23-02-2013, 13:14
XxBlaKOuTZxX
Forum Member
 
Join Date: May 2011
Location: Edinburgh / Scotland
Posts: 2,773
Does it matter if it's Active or Passive....3D is 3D and imo, worth having
XxBlaKOuTZxX is offline   Reply With Quote
Old 23-02-2013, 13:40
Nigel Goodwin
Forum Member
 
Join Date: Apr 2006
Location: North Derbyshire
Posts: 38,234
Does it matter if it's Active or Passive....3D is 3D and imo, worth having
Depends on your point of view
Nigel Goodwin is offline   Reply With Quote
Old 23-02-2013, 15:18
XxBlaKOuTZxX
Forum Member
 
Join Date: May 2011
Location: Edinburgh / Scotland
Posts: 2,773
Depends on your point of view
I meant for those that ARE interested in 3D lol
XxBlaKOuTZxX is offline   Reply With Quote
Old 23-02-2013, 15:31
derek500
Forum Member
 
Join Date: Feb 2002
Posts: 17,734
Active is better quality than passive, and has higher resolution - the BIG (only?) advantage of passive is the low cost of the glasses.
Flicker free, little or no crosstalk, wide viewing angle....

Here's another independent comparison

http://www.displaymate.com/3D_TV_ShootOut_1.htm
derek500 is offline   Reply With Quote
 
Reply



Thread Tools Search this Thread
Search this Thread:

Advanced Search

 
Forum Jump


All times are GMT +1. The time now is 04:52.