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Picture comparison

Discussion in 'DIRECTV HD DVR/Receiver Discussion' started by cyfman, Aug 9, 2018.

  1. Aug 9, 2018 #1 of 34
    cyfman

    cyfman AllStar

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    To my ole eyes :) the picture quality seems to be sharper/clearer on my C61K compared to my 54. All the settings are the same but was wondering if anyone else has noticed this. I have both boxes running through my Denon receiver and both outputs do 4K.

    Just curious :)
     
  2. Aug 9, 2018 #2 of 34
    Rich

    Rich DBSTalk Club DBSTalk Club

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    This is the second thread I've seen about PQ and the different boxes. Interesting.

    Rich
     
  3. Aug 9, 2018 #3 of 34
    jimmie57

    jimmie57 Hall Of Fame

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    Are you watching a 4k content channel on the C61k ?
    The 54 does not output 4k directly to a TV. Max is 1080p.
     
  4. Aug 9, 2018 #4 of 34
    JayRayTex

    JayRayTex New Member

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    54 does not do 4K. C61k does. Is your display 4K? How do you have the scaling options set in each dtv receiver?
     
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  5. Aug 9, 2018 #5 of 34
    patmurphey

    patmurphey Godfather

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    If you have a 4k TV, the upscaling will give you a much sharper picture than on a 1080 TV.
     
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  6. Aug 9, 2018 #6 of 34
    cyfman

    cyfman AllStar

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    I'm comparing the same regular ole HD of the same channel just from the 2 different boxes,and not a 4K feed.
     
  7. Aug 9, 2018 #7 of 34
    cyfman

    cyfman AllStar

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    "How do you have the scaling options set in each dtv receiver"

    Don't ever recall call seeing a scaling option on settings
     
  8. Aug 9, 2018 #8 of 34
    slice1900

    slice1900 Well-Known Member

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    Is it a 4K TV?

    Anyone know if the C61K will upscale on its own (i.e. output 4Kp60 when connected to an HD channel) or will it only output 720p/1080i when tuned to an HD channel?
     
  9. Aug 9, 2018 #9 of 34
    cyfman

    cyfman AllStar

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    Both boxes are going through the receiver to my 4K TV
     
  10. cyfman

    cyfman AllStar

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    That's kind of what I was wondering and if that was indeed happening :) And yes it's a 4K TV. The difference I'm seeing isn't up to 4K standards but to me it's just a better picture overall
     
  11. JayRayTex

    JayRayTex New Member

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    Based on the resolutions that have been checked, you can force the directv box to scale to a certain resolution (when combined with setting Native to "off"). But you shouldn't do this. The video processing chipset in the directv hardware is generally going to do a much worse job than your tv will do.
    The correct setup is to check all the resolutions your display supports, and then set Native to On: How to turn on Native Mode (DIRECTV new Genie menus) - The Solid Signal Blog . Make sure both your directv boxes are setup this same way and then try your test again.
     
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  12. jimmie57

    jimmie57 Hall Of Fame

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    I would think that a C61k would Not do that. It would then be sending a signal that the TV does Not know what to do with.
     
  13. JayRayTex

    JayRayTex New Member

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    Also, assuming your Denon is 2017 or newer, make sure your Denon is not scaling, has Enhanced HDMI enabled, your C61K is plugged into the HDMI-In port closest to the HDMI-Out port, and that your cables are no more than 25' long

    Denon 4K Help: 4K Source Devices and 4K AVR/TV Connections, HDR
     
  14. JayRayTex

    JayRayTex New Member

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    He said later that the display is, in fact, a 4k display.
     
  15. jimmie57

    jimmie57 Hall Of Fame

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    My reply was to post #8.
     
  16. JayRayTex

    JayRayTex New Member

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    I see - however that poster didn't list what his display was...it was more a general question of whether the C61K could be forced to upscale everything to 4K (assuming one had a 4k display). (And I think, if memory serves me the answer is 'no' because on the settings screen it requires a non-4k resolution option be checked in addition to the 4k option - but I could be mistaken - if it doesn't force the additional option check and you can check only the 4k option then the answer is 'yes')
     
  17. jimmie57

    jimmie57 Hall Of Fame

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    4K TVs upscale lesser resolutions to 4K before it comes to the TV screen for you to see.
     
  18. JayRayTex

    JayRayTex New Member

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    Yep - of course they do. "4k" TVs have a native resolution of UHD (2160p) so anything that comes into them that's non-native must be either up-scaled (480p, 720p, 1080p) or de-interlaced (2160i - although there is no 2160i content) or both (480i, 1080i). Generally speaking, that poster (wanting to force the C61k to output everything as UHD) shouldn't do that (because the TV has better hardware to do it) unless he is trying to solve a specific problem that can't be solved another way...
     
  19. slice1900

    slice1900 Well-Known Member

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    It would only do that if it was connected to a 4K display (it knows by EDID, and the HDMI/HDCP version)
     
  20. slice1900

    slice1900 Well-Known Member

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    Theoretically the C61K should have an opportunity to do a better job upscaling, because it has the HEVC compressed data to work with. The TV only has the uncompressed HDMI, which gives it less information to work with.
     

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