Confirmed: Altona AT-HD620 working on Apple 27" LED Cinema Display

Discussion in 'Mac Accessories' started by xispec, Oct 6, 2010.

  1. xispec macrumors member

    Joined:
    Aug 15, 2010
    #1
    I have confirmed that the Altona AT-HD620 does work with the new Apple 27" LED Cinema Display. I rushed into setting up the ACD and remembered my brother had the Altona Adaptor which he used for his iMac and quickly grabbed it and tested to see if my PS3 worked on the display and it did! It upconverts 1080p to 2560x1440 which it looks quite amazing. I don't plan to use this to replace my HDTV but it's nice that I don't have to run from my room to the basement just to use the PS3.
     
  2. ovrlrd macrumors 65816

    ovrlrd

    Joined:
    Aug 29, 2009
    #2
    I also got one of these and it works great. Audio is passed through MDP from HDMI so even the speakers built into the display work. The only issue is that you have to keep your display plugged into your computer with USB if you want to be able to control brightness and the sound volume. Small downside considering how well the device works.

    As other reviews have stated, upscaling to 2560x1440 has a small drop in quality, but that is to be expected with lower resolution content. The latency is completely non-existant though, and that is a huge bonus for FPS games.

    Great product and definitely enjoy playing PS3 with it.
     
  3. Cycom macrumors 6502

    Cycom

    Joined:
    Mar 27, 2007
    Location:
    Los Angeles, CA
    #3
    What do you mean by "small drop in quality?" It's not stretching the image obviously, but what happens during the upscaling that makes it look worse that native 720p/1080p?

    Aren't native 720p signals upconverted/scales in 1080p TV's?
     
  4. Cycom macrumors 6502

    Cycom

    Joined:
    Mar 27, 2007
    Location:
    Los Angeles, CA
    #4
    Possible to show pics/videos? I'm getting my 27 acd next week along with a ps3.
     
  5. ovrlrd macrumors 65816

    ovrlrd

    Joined:
    Aug 29, 2009
    #5
    There is some noticeable aliasing on edges when sitting close to the display. You are right that 1080p TVs scale 720p up to 1080p, but they are highly optimized for this kind of scaling and do additional image processing to make it look good (which adds a lot of latency).

    The Atlona is doing all the image processing and scaling, and it's very low latency (even while doing the HDMI to MDP conversion at the same time), so the quality is not quite as good as a powerful image processor and scaler. An example is that scaling using software on my Mac is definitely a lot better at scaling 1080p to 1440p, but it has a lot more processing power to do the image processing and can do it very quickly.

    I would say the quality is good enough for me, it has no image issues like ghosting, weird color outlining, or anything like that. I have used quite a few hardware based scalers like the Atlona for other displays (not MDP displays mind you) and they were all much worse than the Atlona. If you aren't sitting so close to the display there is no issues.

    Basically is it the best looking scaling I have ever seen before? No of course it doesn't compare to more powerful scaling that can be done with a computer, but it also does something that no other scaler does which is support HDMI to MDP and even audio over MDP. The results are more than acceptable.

    I did a comparison where I played back a 1080p movie on my Mac Pro and played it back on my PS3 using the Atlona. The Mac Pro clearly looked better doing the scaling, but when I actually sat a few feet back from the display I couldn't tell the difference between the two at all.
     
  6. Ashok0 macrumors regular

    Joined:
    Jul 27, 2010
    #6
    I have an XBOX 360 that is VGA only (no HDMI). Is there any way I can get it to work with the LED Cinema Display 27"? I see Atlona sells a AT-HDVIEW VGA to HDMI Scaler/Converter.

    Can I go XBOX360 (vga) ---> AT-HDVIEW (vga to hdmi) ---> AT-HD620 (hdmi to mdp)???
     
  7. ovrlrd macrumors 65816

    ovrlrd

    Joined:
    Aug 29, 2009
    #7
    Contact Atlona, I am sure they will be able to tell you the best setup for your situation.

    I am not sure if the setup you are talking about is a good idea because of the different aspect ratios involved. Something to remember is that you want to use a 16:9 aspect ratio throughout the whole chain since the display is 16:9. So you'd need the 360 to output 720p through VGA, then have a converter that will convert it to 720p through HDMI. Then you might want to consider getting the much cheaper HDMI to MDP converter from Atlona because if you aren't doing 1080p the AT-HD620 is kind of pointless.

    Like I said, it's best to contact them and let them know every single detail you can come up with about your setup.
     
  8. mibale macrumors newbie

    Joined:
    Apr 29, 2016
    Location:
    San Francisco, CA
    #8
    Hi there, do you happen to have this device for sale by any chance? I'd be happy to purchase it from you. I'm trying to get a hold of the AT-HD620. Thank you.
    --- Post Merged, Apr 29, 2016 ---
    Hi there, do you happen to have this device for sale by any chance? I'd be happy to purchase it from you. I'm trying to get a hold of the AT-HD620 for use with the apple cinema and a pc laptop. Thank you.
     

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