What is the advantage of 1080p output?

Discussion in 'Apple TV and Home Theater' started by JonHimself, Feb 12, 2008.

  1. JonHimself macrumors 68000

    JonHimself

    Joined:
    Nov 3, 2004
    Location:
    Toronto, Ontario
    #1
    I'm just curious about the output options on AppleTV. Does it upscale the source to whatever output setting we select? For example, if I rip a standard DVD for playback on AppleTV, will there be a noticeable difference between selection 720p, 1080i and 1080p output settings? The TV I have is capable of 1080p output, so that is not an issue. I'm just curious if the displayed movie should look better by using the highest output setting?
     
  2. imlucid macrumors 6502

    Joined:
    May 3, 2007
    #2
    Depends on the TV. You'd have to try it to see which has the better scaler.

    Kevin
     
  3. arn macrumors god

    arn

    Staff Member

    Joined:
    Apr 9, 2001
    #3
    As stated by Kevin, it depends.

    Your TV will display 1080p. That means when it gets a signal, it upscales it to 1080p no matter what. The Apple TV content is 720p max.

    So, if you output 720p to your TV, it will scale it to 1080p
    If you output 1080p from your Apple TV, the Apple TV is scaling it from 720p to 1080p.

    So depending on which scaler works better, you may get varying results.

    arn
     
  4. JonHimself thread starter macrumors 68000

    JonHimself

    Joined:
    Nov 3, 2004
    Location:
    Toronto, Ontario
    #4
    So what I should do then is try settings in different combinations? TV & AppleTV to 720p, TV to 720p AppleTV to 1080p, TV to 1080p AppleTV to 720p, etc etc Then see which looks best?
    Should it differ from file to file? Should one encoded file look better at a different combination? I'm just wondering for when I try out the settings.
     
  5. imlucid macrumors 6502

    Joined:
    May 3, 2007
    #5
    You only need to change the video resolution settings in Apple TV. The TV will always output at its native resolution (i.e. 1080p). If you feed it 1080p from Apple TV, then its the ATV that is doing the up conversion.

    If you feed it 720p, it is the TV that is converting from 720p to 1080p.

    If you are watching 480p material, its possible you'd convert from 480p to 720p on the ATV, then from 720p to 1080p on the TV. In that case you might get better results having the ATV scale it all the way to 1080p.

    But as was said before, you'll have to try these out for yourself. You'll probably not notice much if any difference.

    Kevin
     
  6. fcpdude macrumors newbie

    Joined:
    Sep 1, 2006
    Location:
    Orange County
    #6
    :confused:
    My TV is a Panasonic 50" and it does NOT automatically go to 1080p (on the HDMI input), it detects whatever signal is being sent and then sets it to that.

    But you all are still confusing me...does the AppleTV spit out 1080p?
     
  7. JonHimself thread starter macrumors 68000

    JonHimself

    Joined:
    Nov 3, 2004
    Location:
    Toronto, Ontario
    #7
    Thanks for the reply. I can't really notice a difference across all variables. Also, like fcpdude, my TV is set to automatically switch to whatever is being fed into it. So when I change my output in AppleTV, the input title switches from "Input 4: 720p" to "Input 4: 1080p". Unless of course that only describes the incoming signal (read: Input 4: Receiving 720p signal) and the TV is always displaying at 1080p, as you said. If that's the case, then I understand, it's all up to the setting on the AppleTV.
    Again, thanks for your help (to everyone else as well)
     
  8. arn macrumors god

    arn

    Staff Member

    Joined:
    Apr 9, 2001
    #8
    Ya, the TV has a native resolution (1080p). What is being shown is is the input signal.

    arn
     
  9. zedsdead macrumors 68040

    Joined:
    Jun 20, 2007
    #9
    Likely the 1080p will make the pictures and graphics look sharper. As for video, currently 720p is the max
     
  10. AVonGauss macrumors regular

    Joined:
    Oct 6, 2006
    Location:
    Boynton Beach, FL
    #10
    Your television is displaying the input signal (720p, 1080i, 1080p) of the source. If you have a true 1080p television, then it always displays in "1080p" performing any necessary conversion and enhancements along the way. If your television supports a dot-by-dot mode or 1:1 mapping mode then it will display the source without any conversions but may still do some enhancements (i.e. enhanced blacks).

    For an iTunes HD movie, the question is - is it better to have the ATV unit perform the upconversion to 1080p or let the television do it - the answer was it depends, primarily on your television... ;) For what it's worth, with the Sharp I really couldn't notice a difference between the two using Pirates of the Caribbean.

    Originally I thought I would give the ATV a break and set it to 720p and let the TV do the upconversion, but after reading Kevin's post about the double conversion that I didn't think of, I'm back to 1080p from the ATV. As much as I wish a lot of the content I watched was 720p, the reality is most of it is 480p television shows or specials... :(
     

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