Is chroma 4:4:4 working?

Discussion in 'Apple TV and Home Theater' started by billhinge, Oct 7, 2018.

  1. billhinge macrumors member

    Joined:
    Dec 27, 2013
    #1
    Hi,

    Hopefully someone can help

    Just purchased new Panasonic fz952b 4K OLED (UK model) and have apple tv connected to full fat HDMI port via Belkin cable. When I go to settings I only get a choice of 4:0:0 or 4:2:2 chroma settings. How do I obtain a 4:4:4 option

    Also I mainly watch movies and US tv shows on Apple, should I use the 50Hz or 60Hz settings? Currently using 4K HDR 50Hz setting with match original dynamic range and framerate settings.

    thanks
     
  2. 400 macrumors 6502

    Joined:
    Sep 12, 2015
    Location:
    Wales
    #2
    4k SDR setting? No one does 4:4:4 I think?

    Belkin cable over specced for the ATV. Mine work in 4k sdr and a lot cheaper.

    Set the box to auto frame rate etc. And forget about it.

    Edit
    https://support.apple.com/en-us/HT208288
     
  3. Donfor39 macrumors 65816

    Donfor39

    Joined:
    Jul 26, 2012
    Location:
    Lanarkshire Scotland
    #3
    I think there is a noticeable difference from 4:2:2 to 4:4:4 though that's initially on menu'a
    And I enjoy the description of each choice and happy to choose 4:4:4.
    I also use SDR though thought it is 60hz I don't have tv on to check just now.
     
  4. 400 macrumors 6502

    Joined:
    Sep 12, 2015
    Location:
    Wales
    #4
    Think it is for the connection directly to ATV. Content sent over ip/Blu-ray/contribution/transmission/live will be less (e.g. 4:2:0). Menus from the tv perhaps? Just try it out and if you are happy then leave it there.

    Saying that I have set mine to 4:4:4 when SDR because it works when I use SDR (I leave it in HDR most of the time so 4:2:2). Remember what 4:4:4 means (chroma sub sampling and bandwidth as a result, maybe no real benefit apart from menus?).

    Frame rates 60 vs 50 is a throwback to nations mains supplies. Use whatever your tv lives with and you are happy with. I tried 60 but no discernible difference with 50 for me so I turned on the auto features in the link above and it just gets on with it. I suppose it depends on the TV, mine is pretty god at whatever you chuck at it, others will be less so.

    End of the day, if you are happy with it, let it be. It is good at what it does.
     
  5. billhinge thread starter macrumors member

    Joined:
    Dec 27, 2013
  6. BODYBUILDERPAUL macrumors 65816

    Joined:
    Feb 9, 2009
    #6
    I'm in the UK and I use Match etc but I have my LG B7 set to 60hz instead of 50hz as there are still apps that don't auto switch - I believe that YouTube does not switch automatically anymore and most of the video that I like on that are 30 or 60fps.

    The Belkin cable is excellent. Apples uses it for their testing of the ATV. It gets Apple's recommendation and that's good by my standards plus it's £30 not £3000, you buy it once and let's be honest, this is connected to expensive TVs so why compromise?
     
  7. 400 macrumors 6502

    Joined:
    Sep 12, 2015
    Location:
    Wales
    #7
    This Belkin cable needs to be kicked into touch, you will get exactly the same result with a correctly certified "High Speed" or "Premium High Speed" from a good supplier at a fraction of the price. The Belkin cable is a con as far as ATV goes.
     
  8. mnsportsgeek, Oct 12, 2018
    Last edited: Oct 12, 2018

    mnsportsgeek macrumors 68000

    Joined:
    Feb 24, 2009
    #8
    I used to believe this and prior to last night I never spent more than $5-$6 dollars on an HDMI cable.

    When I bought my 4K TV a few weeks ago, I bought some amazon basic cables that were high speed. It had been a long time since I purchased HDMI cables so I wanted to make sure I had some that supported Dolby Vision. They arrive and were a total disaster. I tried activating Dolby Vision. Sometimes it would activate. Other times I would get a black screen. I would sometimes pass the HDMI test and sometimes fail.

    Then I read that I should try premium certified cables. OK. Let's try the mono price cables. Nope. Same story.

    Now I'm starting to think my TV sucks or the Apple TV sucks. On a last ditch effort, I go buy the Belkin cable. Works flawlessly. Haven't had an issue, and I'm not the only story like this. Maybe I could have gotten a better result had I spent $10-$15 instead of $5 but I was sick of playing the lottery at this point.

    I do believe that it's the Apple TV that simply sucks at Dolby Vision, but ultimately I had to buy a $30 cable to get it to work. I would not expect to have to do this on another Dolby Vision device. I guess I'll find out someday.
     
  9. 400 macrumors 6502

    Joined:
    Sep 12, 2015
    Location:
    Wales
    #9
    Did your premium have this logo?
    https://www.hdmi.org/manufacturer/premiumcable/Premium_HDMI_Cable_Certification_Program.aspx

    A correct cable for the job connected to the correct TV port with the correct HDMI and software version will work. Premium are rated for the 18gb/s (?) spec i Think. I would have sent the mono price back and said it was not working. UK has rather good rules on this, not sure for the US. But on the back of an Apple TV is a HDMI 2.0a. That fits with Premium.

    There is a mess with cable labelling. FWIW if I need new cables then I will get Premium. People sell you cables with labelled as 2.0 etc when they can only be labelled as the speed as per the link. However you get one that works, and are happy, then does not matter what is written on it.
    https://www.hdmi.org/consumer/finding_right_cable.aspx
    https://www.hdmi.org/manufacturer/hdmi_2_0/
    Be interesting to know what the fail rate is for the Belkin cables. Not sure there are any "Ultra High Speed" that are correctly tested hitting the market yet. Be interesting to see where they pitch their prices.
     
  10. BODYBUILDERPAUL macrumors 65816

    Joined:
    Feb 9, 2009
    #10
    Why is the Belkin cable a con? It's £30 not £3000. It's beautifully made, for people who love design and attention to detail, it matches the Apple mains lead plug design - yes, important to me design wise! It's using quality components and it's the first HDMI 2.1 standard which means you'll be able to use it when Apple bring out the HDMI2.1 Apple TV in a year or so. Now why is that a con? My last Apple HDMI lead was bought for my ATV 2 in 2010 and has been perfect for the last 8 years - I still use it for connecting things. It was used for ATV 2 then my ATV 3 in April 2012 and then my ATV 4 in 2015. Sorry for to me, cheap products are a con, not something that has had some time built into its R&D.
     
  11. 400 macrumors 6502

    Joined:
    Sep 12, 2015
    Location:
    Wales
    #11
    Because it is being pushed as the only one with no options in a few places. It is like me recommending EON as the only electricity supplier when just as capable cheaper options are there. Same volts, same hertz, same cable into the house, different name.

    If you value well made, why not the Monster cables at £60? They look pretty. Probably work as well. £60 got to be better? Saw some for £900 Audio Quest jobbies , now they must be superb, looked the part anyway. They come round to tarmac your drive as well. Yeah, well, perhaps not.

    2.1 test criteria has only just been released by the HDMI org, well after this cable was released. Belkin are hoping it will pass, it may well pass or not. Probably will.
    https://www.hdmi.org/news_events/index.aspx#CTS2018
    But it does not have the test certificate yet? They are careful with the naming perhaps?
    https://www.hdmi.org/consumer/finding_right_cable.aspx
    They call it Ultra HD High Speed.

    It will be interesting to see what comes out as "Ultra High Speed" and what they cost when makers start to pass the test. But they will be of no real benefit over Premium to the ATV with a 2.0a HDMI hardware as far as I know, the chip sets in 2.0 able to get a software upgrade to 2.1? Think 2.1 requires a new chipset. ATV 8K perhaps? Then you need a new TV to work with 2.1 to get the full potential. TV at the moment 2.1 or 2.0 HDMI? Then new Ultra cables will be a lot cheaper I hope.

    Of course there will also be the usual rubbish making things difficult and there will always be cables well made and not certified that will work, such as this Belkin. I do think that it is very confusing at the moment. HDMI.org should just recommend Premium but High Speed also has 4k components in the spec so they cannot.

    Anyhoo. If you like it then crack on, not for me to say. Not saying you don't have to, just that this cable seems to be pushed to the front ignoring others, that is the bit that gets me. Cost for me is important, maybe others as well. £30 is too much for something where £8 will do exactly the same thing. I can put up with the hassle of returns in the UK as the law is on our side, no cost.

    In the digital world I value results over looks and cost, its my tick. Each to their own but people have a choice, expensive or cheap. If the cheap works then the expensive provides absolutely no benefit with HDMI. Not that you can see without test kit anyway.
    :)
     
  12. billhinge thread starter macrumors member

    Joined:
    Dec 27, 2013
    #12
    Just reaaranged the outputs on my TV and tinkered with the apple tv settings

    In 4K HDR the options are 4:0:0 and 4:2:2 but you get the 4:4:4 option under 4K SDR
     
  13. cynics macrumors G4

    Joined:
    Jan 8, 2012
    #13
    4:4:4 chroma @ 10 bit color and you exceed current bandwidth limitation. It’s not a thing.
     

Share This Page

12 October 7, 2018