Directv 4K quality

Discussion in 'DIRECTV General Discussion' started by captaink5217, Apr 4, 2016.

  1. Apr 10, 2016 #81 of 270
    Rich

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    I've got 720p plasmas and 1080p plasmas and I can clearly see the difference in PQ in them. I can also walk very quickly from our TV room to the room with my 1080p 60" Panny plasma and see the difference between the 4K set and the plasma.

    Rich
     
  2. Apr 10, 2016 #82 of 270
    Scott MS

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    Exactly. I'm sure there were a lot of people who thought going from 640x480 (SD) to 1280x720 (HD) wasn't much of a difference either. It's resolution and if have you have a monitor large enough and detailed enough to see the difference, it is incredible. I have two 4K TVs, and 4K monitor, and record family videos in 4K. Never going back to 1080p.
     
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  3. Apr 10, 2016 #83 of 270
    HoTat2

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    No I can see the difference between a 640 x 480 native SD image and a 1280 x 720 HD one.

    But to use this example, the issue related to what's being discussed here is would a 640 x 480 SD native image look any better upscaled to 1280 x 720?

    And I'd have to say that it shouldn't. Or perhaps there's no real technical explanation for why it should that I'm aware of.

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  4. Apr 10, 2016 #84 of 270
    Christopher Gould

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    I'm going to take a guess here that the upscaling ability probably has improved on today's tv sets compared to the ones you currently own. I own a samsung hu8550 (2014) and adding the one connect upgrade box (2015) has improved it's ability to upscale. Newer software and faster processor.
     
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  5. Apr 10, 2016 #85 of 270
    NR4P

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    If you came to my house you would see something interesting

    ABC network shows are available to me over two different markets/stations.
    Take the evening news
    I can watch one station in 720p as ABC has designed recommended (like on ESPN too)
    I can watch the other station who decided to show all ABC content at 1080i

    The detail on the 1080i broadcast is superior.
    I can flip back and forth and the same TV and see the same content in different resolution.

    So for those who claim the little difference from 720 to 1080 is not perceptible hasn't had a good way to judge.

    Now with 4K, the new TV technology and upscaling does wonders to some 1080i content.

    Nothing like SD to HD, but noticeable.
     
  6. Apr 11, 2016 #86 of 270
    James Long

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    Considering that the ABC network content is all upscaled from 720p more information is needed. How much bandwidth does the 720p ABC devote to their ABC feed and how much is spent on subchannels? How about the 1080i ABC station?

    The source of both stations (the ABC network feed) is less than 1 megapixel frames. Upconverting to nearly 2.5 megapixels doesn't add more information than was originally there. There must be some other explanation.
     
  7. Apr 11, 2016 #87 of 270
    HoTat2

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    Correct!

    And by the same token for 4K, shouldn't upconverting an ~2 megapixel (1080i) HD frame by 4 times as many megapixels or even 9 times as many megapixels for the less than 1 megapixel HD frames (720p) not add more information than was originally there?

    I agree, something else has to be at work here for the perceived increase in PQ. Not mere upscaling.



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  8. Apr 11, 2016 #88 of 270
    terryfoster

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    Dismissing the actual science of visual acuity makes me LOL.
     
  9. Apr 11, 2016 #89 of 270
    hancox

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    The elephant in the living room is whatever the 1080i ABC station is using to convert, too. This isn't taking a downconverted sporting event and comparing 2 resolutions. Apples and Oranges.
     
  10. Apr 11, 2016 #90 of 270
    Rich

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    It's never been imperceptible to me on my plasmas. I can even see a better picture on my 720p plasmas when they get a 1080i feed. What the upscaler on my 4K set does to 1080p feeds is really something worthwhile.

    Rich
     
  11. Apr 11, 2016 #91 of 270
    patmurphey

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    I guess it must be magic, since you don't seem to understand the technical science of upscaling...
     
  12. Apr 11, 2016 #92 of 270
    HoTat2

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    Well can you explain some of these scientific principles of upscaling we're not understanding for how that process can create additional PQ that the source material never had?

    I'd love to be enlightened on this if I'm indeed mired in such error as you claim I am ...

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  13. Apr 11, 2016 #93 of 270
    RunnerFL

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    http://lmgtfy.com/?q=video+upscaling
     
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  14. Apr 11, 2016 #94 of 270
    Scott MS

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    Got it. Upscaling really doesn't "improve" the picture quality. You can't add detail into the image that doesn't exist by simply interpolating pixels.

    What it does do, however, is smooth out the picture on larger sets. As TVs get bigger and bigger, you start to see the pixels structure. I remember looking at the 90" Sharp TV and if you sat about 5 feet away, you could literally make out the block structure of the 1920x1080 pixel display. Bring in a 4K display and the pixel structure is no longer noticeable and the picture is smoother.
     
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  15. Apr 11, 2016 #95 of 270
    David Ortiz

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    It is at least possible that by now, a significant amount of ABC programming is 1080p/24 and only converted to 1080i or 720p by the affiliate upon broadcast. So conversion from 1080p/24 to 1080i would have more detail than conversion from 1080p/24 to 720p.
     
  16. Apr 11, 2016 #96 of 270
    slice1900

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    Only movies are produced at 24 fps, TV is always produced at 30 fps (or 60 for sports and maybe some action shows) 1080p30 is trivially converted to 1080i, and your TV can exactly recreate the 1080p30. If it is converted to 720p you lose resolution information, and no scaler, no matter how good, can exactly recreate the original 1080p picture from a compressed 720p source the way it could from a 1080i source. The only way it could is if it hid the "lost" information in the intervening frames (since it would convert 1080p30 to 720p30, you either repeat each frame or use it somehow. I have no idea if there's some way to hide the extra resolution information in those otherwise unused frames, but if they did it would have to be something that wouldn't affect the picture when no scaler was in use.
     
  17. Apr 11, 2016 #97 of 270
    David Ortiz

    David Ortiz Save the Clock Tower!!

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    The master format for Lost was 1080p/24 http://www.imdb.com/title/tt0411008/technical and that was the Blu-ray format as well.

    As of 2012, ABC Network was requesting 1080p/24 for files meant for broadcast. https://webcache.googleusercontent.com/search?q=cache:W--aHkYYpLgJ:https://mediamonorail.disney.com/techspecs/ABC%2520Network%2520ProRes%2520Delivery%2520Spec.pdf+&cd=1&hl=en&ct=clnk&gl=us
     
  18. Apr 11, 2016 #98 of 270
    slice1900

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    Interesting, I didn't know they changed. Seems odd, since it requires 3:2 pull down when displayed. While some TVs will recognize that and correct it, by no means will all of them - even some recent expensive 4K TVs can't recognize and correct that automatically.
     
  19. Apr 11, 2016 #99 of 270
    KyL416

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    ABC's master satellite feeds that the affiliates get are 720p

    What's likely happening in NR4P's case is the 1080i affiliate is devoting more bandwidth to the ABC HD feed compared to what the 720p affiliate is devoting to it.
     
  20. Rich

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    Thing is, you don't have to understand the technology, the result is right before our eyes. Let them get a 4K set and then let's see if the same folks can argue against what we see...so very clearly.

    Rich
     

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