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Some 4K issues with non-4K content

Discussion in 'Blu-ray and UHD' started by Nick*Z, Jan 21, 2017.

  1. Nick*Z

    Nick*Z Screenwriter

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    Okay, wondering if anyone on the forum can shed some light on this problem I seem to be having.

    Purchased the Panasonic Viera TC-65DX800C and am enjoying it immensely with one caveat. Occasionally, I seem to be getting a queer 'ghosting' of the red record while uprezing Blu-ray content from my Sony BDP S6200. The BDP S6200 has a 4K uprez built into it and the TV is, of course, brand new and 4K. Tried adjusting various PQ settings to get rid of this but to no avail. I can minimize it somewhat if I boost the backlight feature on the TV to nearly 100% but this makes the entire image too bright for my tastes.

    The issue, if I can describe it is as follows; a sort of ghosting, usually - but not always when the color red is present; a red halo around people, objects, etc. Flesh tones are particularly notorious, during darkly lit scenes, but there have been a few instance where brightly lit scenes suffer too. Example: Funny Face - the 'think pink' number, the girls dresses and hair have a sort of red ghost shadow whenever they move, which is always. Don't really know what to do. Wondering if it's my cable. I confess, I haven't upgraded to a 4K HDMI cable yet, having only had the TV a week, and am still using my old HDMI cable. It had no such flaws when it was hooked up to my old non-4K set.

    Thoughts, ideas. Recommendations on new cables if they are needed. Again, thanking everyone in advance for their insight and help.

    PS - please, no recommendations to buy a new player. I have every intention of going full 4K when Oppo irons out the kinks from its debut player later this year and includes Dolby Vision in its hardware updates. Thanks again.
     
  2. antmumford

    antmumford Extra

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    Maybe try turning the Blu-ray players uprezing feature off. Let the TV do the upscaling and see if that makes a difference. If not then it may be a tv setting that needs changing, have you turned off all the horrible processing features of the TV and got the TV calibrated to the correct settings, I.e. black level and contrast?
     
  3. Nick*Z

    Nick*Z Screenwriter

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    Well, for starters I've tinkered with just about every setting you can find. The Panasonic has an extensive array of controls and NO calibration instructions. I've looked on the internet for help as per 'the best' way to calibrate the set and there are few suggestions outside of the 'do what looks best for you' advice. Honestly, if you're going to give me a thousand and one options, as the manufacturer the least you could do is provide a 'best practices' model for how this should be done and also a troubleshooting guide that goes beyond the 'if no picture appears try plugging the set in' advice.

    I did turn off the player's 4K uprez but then the TV info says it is only taking in a 1080p signal; so no, I didn't buy a 4K set and an uprezing player to still watch my Blu-rays in 1080p. And the problem I described in the previous post is intermittent. You can watch a movie and its not there and then you can watch it again and its there. I intend to contact Panasonic later this week when I get a day off of work so I can pick their brains on this one too but was hoping someone in the forum could shed a little light on this beforehand so I could go into that conversation a little better informed. Thanks anyway for the suggestion. It has been tried.
     
  4. Mike2001

    Mike2001 Supporting Actor

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    If the picture is filling up more than a quarter of your screen when you send in the 1080p signal, then the TV is up-rezing for you.
     
  5. Nick*Z

    Nick*Z Screenwriter

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    Okay, Mike start over on that one. If the picture is filling up more than a quarter of your screen?!? Please explain and thanks.
     
  6. dpippel

    dpippel HTF Premium Member
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    I think he's trying to say that if your display is 4K and you're feeding it 1080p from your Blu-ray player, the *display* is upscaling the image to 4K. This is correct. The "1080p" info that your panel is showing you is what's coming in on the *input*, which is 1080p since you disabled upscaling on the player.
     
  7. Mike2001

    Mike2001 Supporting Actor

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    Correct Doug. If the TV weren't upscaling, the picture would just fill up a quarter of the screen, since that is the real estate occupied by the pixels coming out of the player.

    Either the player will do the upscaling or the TV will. An earlier suggestion had been to try the TV's upscaling instead of the players's to see if that solved the problem. Nick implied that if he wasn't upscaling at the player, he wasn't seeing a 4K signal on his screen. I was just pointing out that unless his picture was severely window boxed, he was seeing a 4K picture, just upscaled by the TV (as per Anthony's earlier suggestion).
     
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  8. Nick*Z

    Nick*Z Screenwriter

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    Mike: thanks for clarifying this. Will experiment tonight with a few of the problem discs. All this is new to me - new 4K TV and thus, all the bells and whistles associated with it. When I had my faux K projector installed last year the place I bought it from did a full calibration/set-up and tutorial explaining the virtues and vices from top to bottom. So, when I went into my first night's viewing I already was armed with considerable info on how to troubleshoot problems. For the record, have never had anything but love and kisses for my Epson projector. LOVE IT! This TV hasn't been so easy to warm to - not yet. I don't give up easily, though. So, any other educational bits you can pass on would be greatly appreciated. Thanks again.
     
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  9. Message #9 of 9 Jan 22, 2017
    Last edited: Jan 22, 2017
    Stephen PI

    Stephen PI Supporting Actor

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    I've been seeing a very slight red fringe, not all the time, for some years now and put it down to a slight defect in the technology.
    I watched a podcast the other day of Scott Wilkinson at CES 2017. During the show he interviews somebody with regarding new color technology and he touches on the subject of 'color overlap', which might be what you and I are seeing.

    If you go to 14:15, Wilkinson discusses with an LG rep and he mentions a new technology called 'Nano Cell Display Technology' and they acknowledge that it reduces 'color overlap'.
     

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