First Look: DIRECTV C61K 4K Genie Mini Client

Discussion in 'DIRECTV HD DVR/Receiver Discussion' started by Jacob Braun, Aug 5, 2015.

  1. NR4P

    NR4P Dad

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    Are you connecting through an AVR or direct to TV?
     
  2. Hideftv

    Hideftv Member

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    Directly to TV with Optical to AVR.
     
  3. NR4P

    NR4P Dad

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    What 4K TV? And can verify the input is HDMI 2.0/HDCP 2.2?
     
  4. Hideftv

    Hideftv Member

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    Yes 4K works fine VOD and test channels. Sony XBR65X900B. It just will not keep the 720p unchecked after a power off. As soon as I unselect it the resolution changes to 1080i if tuned to a HD channel. The TV OSD shows 3840x2160p when watching 4K.
     
  5. NR4P

    NR4P Dad

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    I see what you mean. Tried it on my C61K and it does not stay off.

    Never noticed it because it leave Native off so I get either 1080i or 4K depending on channel/source.


    Maybe a bug in code or a reason for that, don't know.
     
  6. Hideftv

    Hideftv Member

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    Thanks! I have Native Off also, but every now and then it actually displays 720p until I uncheck it or watch 4K. They will probably get it fixed in a software update sometime.
     
  7. Rockaway1836

    Rockaway1836 Godfather

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    Normally I have my receivers set to 1080i and native off. With the C61 I found out sometime ago that doing this has the unit defaulting to 720p. So I keep native on to get around it.
     
  8. Hideftv

    Hideftv Member

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    I changed mine to Native On to try it for a while. I am not sure I liked the picture when the C61K was up scaling HD to 4K. Movement seemed a little jerky at times no matter what motion flow setting I tried.
     
  9. P Smith

    P Smith Mr. FixAnything

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    You should pay attention to a source signal's parameters - if it's 4K 24P, you can't make it smooth
     
  10. Hideftv

    Hideftv Member

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    Not sure display does not show the source's rate, although motion is not bad on a 4K source.
     
  11. HoTat2

    HoTat2 Hall Of Fame

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    Not really sure what this means ...

    Can you elaborate?

    Sent from my SGH-M819N using Tapatalk
     
  12. Hideftv

    Hideftv Member

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    I think he is saying that with a 24 frame rate per second motion is not going to be smooth. While I do get some minor judder on a 3840x2160p source, a 1080i source upscaled is more of a jerky motion in a lot of scenes. Not sure what the C61K is doing with the frame rate when upscaling. If I watch a 4K source and then switch to a 1080i source with Native Off my display still indicates a 3840x2160p source and motion is jerky. If I go to settings and turn Native On the display switches back to 1080i and motion is smooth. 1080p24 motion is also not jerky on the display. I hope this makes sense.
     
  13. slice1900

    slice1900 Well-Known Member

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    Why can't 24 fps be smooth? It depends on the original content as much as the source signal. Almost every movie is filmed at 24 fps, and no one complains they aren't smooth. If it is content filmed at 30 fps with frames dropped to make it 24 fps then it would be jerky because of the skipped frames.

    We're in the early days of 4K, I'm sure there will be a lot of problems to clean up along the way, just like there were growing pains in the early days of HD.
     
  14. Hideftv

    Hideftv Member

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    I agree. Like I said 1080p24 is smooth on my display. I have not noticed any jerkiness.
     
  15. HoTat2

    HoTat2 Hall Of Fame

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    But why convert native 30 fps film based material to 24 when producing a 4K version of it?

    Since most (higher quality anyhow http://www.cnet.com/news/ultra-hd-4k-tv-refresh-rates/) 4K sets use 120 Hz refresh rates, they can display 24 or 30 fps film programs judder free.

    In fact converting 30 fps film material to 24 makes it slightly worse for those with 60 Hz 4K sets as they now have to deal with judder along with all the native 24 fps programs.

    Sent from my SGH-M819N using Tapatalk
     
  16. slice1900

    slice1900 Well-Known Member

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    Movies are NEVER filmed at 30 fps, only TV shows are, but since TVs all natively support 30 fps I'm not sure why they would ever be converted to 24 fps...not sure what you're talking about here.

    As far as '120 Hz' 4K TVs - this is a marketing number. TVs that claim '120 Hz' only display 60 frames in a second - the other 60 are blank frames which minimizes the visibility of motion blur. Since they are really only displaying 60 unique frames per second, you still need 3:2 pulldown. AFAIK there are no 4K TVs that claim 240 Hz, only HDTVs, so none have a high enough frame rate to avoid the need for 3:2 pulldown.

    However, many recent TVs can display at 24 Hz (or some multiple thereof) when presented with 24 Hz input, and a few can even recognize when 24 Hz material has been converted to 30i/60p and are smart enough to convert it back to 24 fps and use their ability to display 24 Hz material to handle it.
     
  17. inkahauts

    inkahauts Well-Known Member

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    There are several actual true 120 refresh rate 4K tvs. They are the higher end ones that usually claim 240. Most the Samsung SUHD ones for example.
     
  18. NR4P

    NR4P Dad

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    Actually it's marketing BS.
    Great article here

    http://www.cnet.com/news/ultra-hd-4k-tv-refresh-rates/

    120 hz. is the highest native refresh rate that exists according to cnet.

    Samsung's 240 is not confined to SUHD only but it's still 120 hz native.
    Note Samsung doesn't add "hz" after the 240.
     
  19. HoTat2

    HoTat2 Hall Of Fame

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    Somewhat confused though ...

    Is "backlight scanning" a modification of "black frame insertion?" Or are these two separate processes that either or both may to used in a TV to "effectively" increase frame refresh rate?

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  20. slice1900

    slice1900 Well-Known Member

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    Same thing, different term.
     

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