1080p 3D blu rays on a 4k screen - AVS Forum
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post #1 of 6 Old 06-30-2014, 03:06 PM - Thread Starter
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1080p 3D blu rays on a 4k screen

articles such as this one (and several others like it) make it clear that passive 3d on 4k screens finally solves the problem of picking the flicker or black lines. But I'm a bit confused and it seems unclear as to weather this means only if watching a 4k 3d movie.


Would viewing a standard current 3D HD blu-ray on a Passive 4k screen result in the full 1920x1080 image in each eye rather than the normal 1920x540 per eye of a standard hd set?


in short- to get the benefit of the elimination of black-lines with passive 3d: would you need to also upgrade your blu-ray player and movie collection?
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post #2 of 6 Old 06-30-2014, 03:55 PM
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All 3D BR are the same, no 4k BR exist yet. So the answer is no player, media upgrade required until such a format is created. When and if it is created then its back to the same problem, active will be 3840x2160 where the passive 4k set will be 3840x1080.

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post #3 of 6 Old 07-01-2014, 03:00 AM
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Quote:
Originally Posted by cityinruin View Post
Would viewing a standard current 3D HD blu-ray on a Passive 4k screen result in the full 1920x1080 image in each eye rather than the normal 1920x540 per eye of a standard hd set?
Normally yes. However there is a 4K set I am aware of where this is not the case. [The Sony 2013 model 55" passive 4K set appears to use a coarsely spaced Film Patterned Retarder, limiting the vertical resolution. See
and http://community.sony.com/t5/4K-Ultr...ight/true#M221 ]

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Originally Posted by cityinruin View Post
in short- to get the benefit of the elimination of black-lines with passive 3d: would you need to also upgrade your blu-ray player and movie collection?
Normally no. Normally, the passive 4K TV accepts Full HD 3D, upscales it, and displays it optimally to avoid obvious black lines, making full use of the available vertical resolution of the Full HD source.
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post #4 of 6 Old 07-04-2014, 10:04 AM
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Quote:
Originally Posted by cityinruin View Post
articles such as this one (and several others like it) make it clear that passive 3d on 4k screens finally solves the problem of picking the flicker or black lines. But I'm a bit confused and it seems unclear as to weather this means only if watching a 4k 3d movie.


Would viewing a standard current 3D HD blu-ray on a Passive 4k screen result in the full 1920x1080 image in each eye rather than the normal 1920x540 per eye of a standard hd set?


in short- to get the benefit of the elimination of black-lines with passive 3d: would you need to also upgrade your blu-ray player and movie collection?
As stated by rekbones, the passive 4k set will display at 3840 x 1080. It will still have lines, because it is passive. Theoretically, the lines will be smaller and harder to see.

"The wise understand by themselves; fools follow the reports of others"-Tibetan Proverb
 
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post #5 of 6 Old 07-05-2014, 07:46 PM
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In practice with my Sony 65" 4K set the fine pattern of horizontal black lines is not visible at a normal viewing distance, and the result is very good viewing of 3D with passive glasses. It is a complete solution to the distracting black lines effect.

However, as I have pointed out, there is at least one model 4K set which uses a coarsely spaced film patterned retarder. This results in a pattern of horizontal black lines similar to what you see with a 2K passive set. I find such a pattern visible (and distracting) at a normal viewing distance.

The issue that cityinruin was asking about was whether you need to feed the 4K TV a 4K 3D signal for it to give 1080 line vertical resolution or whether a regular 2K 3D Blu-ray is sufficient. The member asked: "Would viewing a standard current 3D HD blu-ray on a Passive 4k screen result in the full 1920x1080 image in each eye rather than the normal 1920x540 per eye of a standard hd set?"

The answer to that question is that a standard current 3D Blu-ray will be displayed at full 1920x1080 per eye on a 4K passive LCD flat panel, but only if the film patterned retarder used for the flat panel set has a sufficiently fine pattern. For example, the 65" Sony 2013 4K set does have such a fine pattern, resulting in 1080 unique lines for the Left image and 1080 unique lines for the Right image. However, the 55" Sony 2013 4K set does not have such a fine pattern.
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Last edited by MLXXX; 07-05-2014 at 08:32 PM.
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post #6 of 6 Old 07-07-2014, 12:39 PM - Thread Starter
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Quote:
Originally Posted by MLXXX View Post
In practice with my Sony 65" 4K set the fine pattern of horizontal black lines is not visible at a normal viewing distance, and the result is very good viewing of 3D with passive glasses. It is a complete solution to the distracting black lines effect.

However, as I have pointed out, there is at least one model 4K set which uses a coarsely spaced film patterned retarder. This results in a pattern of horizontal black lines similar to what you see with a 2K passive set. I find such a pattern visible (and distracting) at a normal viewing distance.

The issue that cityinruin was asking about was whether you need to feed the 4K TV a 4K 3D signal for it to give 1080 line vertical resolution or whether a regular 2K 3D Blu-ray is sufficient. The member asked: "Would viewing a standard current 3D HD blu-ray on a Passive 4k screen result in the full 1920x1080 image in each eye rather than the normal 1920x540 per eye of a standard hd set?"

The answer to that question is that a standard current 3D Blu-ray will be displayed at full 1920x1080 per eye on a 4K passive LCD flat panel, but only if the film patterned retarder used for the flat panel set has a sufficiently fine pattern. For example, the 65" Sony 2013 4K set does have such a fine pattern, resulting in 1080 unique lines for the Left image and 1080 unique lines for the Right image. However, the 55" Sony 2013 4K set does not have such a fine pattern.
Perfect answer MLXXX, liked.
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