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    USB to HDMI

    Discussion in 'Accessories' started by Delimeat567, Feb 13, 2011.

  1. Delimeat567

    Delimeat567 Notebook Consultant

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    Hey all,

    I was hoping anyone could tell me of a good device I could use in a USB port to turn it into an HDMI port. My friend's computer doesn't have an HDMI port, but has ample USBs.
     
    Delimeat567, Feb 13, 2011
    #1
  2. Lithus

    Lithus NBR Janitor

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    Lithus, Feb 13, 2011
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  3. KSD

    KSD Notebook Consultant

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    usb 2.0 has a max speed of 30MBps which can not drive video at any good resolution
     
    KSD, Feb 13, 2011
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  4. ViciousXUSMC

    ViciousXUSMC Master Viking NBR Reviewer

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    USB 2.0 can drive 1920x1200 and higher.

    I have an adapter that does it and have tested.
     
    ViciousXUSMC, Feb 13, 2011
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  5. kent1146

    kent1146 Notebook Prophet

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    A USB 2.0 video adapter can drive an external video adapter just fine, as long as your expectations are properly set from the beginning.

    You won't do any gaming on it, and you'll get tearing when watching videos. But if you're just going to be using the video adapter for desktop applications on an external monitor, then it will do just fine.
     
    kent1146, Feb 14, 2011
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  6. KSD

    KSD Notebook Consultant

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    yea but your also not getting true color. i assume they put out 16bit color, which is really crappy. Hence why 30MBps works when normally 1920x1200 24 bit color requires 3+ GBps if i did the math right 1920x1200x60 fpsx24bit right? or is my math off?
     
    KSD, Feb 16, 2011
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  7. debguy

    debguy rip dmr

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    I get about 395MBps - still way too much for USB.
    Some months ago I did a similar calculation in another thread (which I can't find anymore) and I came to the conclusion that for a reliable connection via USB 2.0 where one shouldn't assume more than 20MBps a drop of the framerate to 30fps and an additional mpeg compression would be needed. The converter then would have to turn this jam back into a proper HDMI signal (as far as possible).
     
    debguy, Feb 16, 2011
    #7
  8. sgogeta4

    sgogeta4 Notebook Nobel Laureate

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    I'm using a converted from Monoprice (that Vicious recommended) and it drives my 1680x1050 panel at 32-bit colour and 60Hz just fine. I've even watched some small Youtube videos, but generally just use it for simple stock, website, and Excel work. So not sure why the calculations are off (maybe due to some compression algorithms?) but it's great for basic tasks like I mentioned.
     
    sgogeta4, Feb 16, 2011
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  9. ViciousXUSMC

    ViciousXUSMC Master Viking NBR Reviewer

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    Yeah not a gaming adapter or for movies, office work and general multi tasking needs are the main goal of these usb adapters.

    Would work ok for stuff not moving much like powerpoint presentations too.
     
    ViciousXUSMC, Feb 16, 2011
    #9