HLG(Hybrid Log Gamma) on Genie?

Discussion in 'DIRECTV Support Forum' started by jborchel, Oct 11, 2018.

  1. jborchel

    jborchel Topic Starter SatelliteGuys Family

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    Can anyone tell me the what is known about Directv's implementation of HLG? HLG is similar to HDR but for cable and satellite transmissions. I know that it shows up on my LG OLED in the upper right corner when I tune to 104 after I received an HLG firmware update to my Denon receiver. But it does not show up for the HD channels. However, my HD channels look much more colorful since the update.

    Anyone know the actual situation?
     
  2. slice1900

    slice1900 SatelliteGuys Pro

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    HLG is a standard that Directv supports because that's what networks have always planned to use for HDR in live broadcasts. Your receiver or TV may be set to add some false color to HD content, it isn't Directv's doing.
     
  3. goaliebob99

    goaliebob99 SatelliteGuys Master
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    I'm not aware of any HD channels using HLG HDR. While I know it's in the specs, I dont think it's been implemented that way. The only place I have seen HLG HDR be used is on the 4K channels.
     
  4. jborchel

    jborchel Topic Starter SatelliteGuys Family

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    It definitely is on the 4K channel 104. If it was on the HD channels I believe it would show the label on the OLED. But I know the color is better. The other night a Rick Steves tour of Oxford and Cambridge on the PBS station was definitely HLG looking and I checked the Vizio. There is no "Enhanced Color" setting available.
     
  5. compnurd

    compnurd New Member

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    HLG is only enabled on the 4K Channels 104/105/106
     
  6. jborchel

    jborchel Topic Starter SatelliteGuys Family

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    Then I wonder why the color and contrast is so much better on the HD channels. I'm sure it is not my imagination. As soon as I installed the new firmware that contained HLG support I noticed the difference. I didn't even know what HLG was at that time. The firmware update was billed as DolbyVision support and barely mentioned HLG.
     
  7. slice1900

    slice1900 SatelliteGuys Pro

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    Samsung has a fake HDR mode called HDR+ which is sort of like how some 3D TVs supported a fake 3D. I wouldn't be surprised if LG had some sort of setting like that too, but I have no idea what it would be called.
     
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  8. compnurd

    compnurd New Member

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    LG does not.. It could be something with the Denon update
     
  9. jborchel

    jborchel Topic Starter SatelliteGuys Family

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    The most noticeable effect was on the Vizio 4K 70" P Series from 2014 and LG (HD) PF 1500 projector. Neither are HDR functional. I don't think the Denon was doing anything but unpacking the HLG and passing it on to the tv or projector. I think I have read that HLG can be embedded in HD signals as well as UHD.
     
  10. comp9

    comp9 SatelliteGuys Pro

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    It can be embedded but no one uses it from a broadcast perspective
     
  11. jborchel

    jborchel Topic Starter SatelliteGuys Family

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    These are two sentences in the HLG Wikipedia:

    "HLG does not need to use metadata since it is compatible with both SDR displays and HDR displays.[1][2] HLG can be used with displays of different brightness in a wide range of viewing environments.["

    "HLG is supported in HEVC with a formula that is mathematically equivalent to ARIB STD-B67 but has a nominal range of 0 to 1 instead of 0 to 12"

    If the two were combined does it not say that streaming services that encode using HEVC could use this for HD streams? Do any of them already do it?
     
  12. comp9

    comp9 SatelliteGuys Pro

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    No. None do.
     
  13. TheRatPatrol

    TheRatPatrol SatelliteGuys Pro

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    Have you tried bypassing the Denon and running the HDMI cable straight from the client to the TV to see if it makes any difference?
     
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  14. I WANT MORE

    I WANT MORE SatelliteGuys Pro

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    The Genie Mini's use BT2020 color space on ALL channels.
     
  15. jborchel

    jborchel Topic Starter SatelliteGuys Family

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    Does using 2020 mean that it produces the full P3 color for the HD channels, thus explaining the increased color? If so, how long has it been doing this?
     

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