WiFi Alliance's Display Solution: Alternative to Intel's WiDi

We've come to love Intel's Wireless Display (WiDi). It just too dang convenient. Forget about HDMI cables. You just need a WiDi adapter and you can mirror your computer's display onto your HDTV. Better yet, Intel has solved most of the original restrictions, as you can now play protected video content and it supports 1080p. (For more about WiDi, read Forget HDMI. Intel's WiDi Makes It Easy.)

According to some vendors at MWC though, WiDi isn't exactly power efficient feature, which is why WiFi Alliance has stepped in with its proposed 802.11-based wireless display standard (WFD). Presumably this is a better suited to smartphones and tablets. In theory, this overcomes many of the limitations with DLNA because you're mirroring the display. This means anything you see on the smartphone/tablet gets output. With DLNA, the codecs have to be just right and you need a compatible display. Plus, you can only play videos, music, and pictures. It's a far cry from plopping down on the couch and playing Angry Birds or Sonic the Hedgehog 4: Episode II using your smartphone as a controller in combination with your 55" HDTV.

We saw a prototype adapter by Cavium, and it's really small -- about the size of 10 credit cards stacked together. This makes it even more attractive than WiDi, because the Netgear PUSH2TV adapter is almost the size of a set top box. We're thinking that WFD might even have applications as a replacement for portable media players devices like those from Western Digital. If you're a traveler who wants to watch movies at your hotel, now you just have to carry around a small adapter and load all of your movies onto your smartphone/tablet.

At the present time, the technology is still in its infancy. The final standard should be worked out before the summer, and we hope to see devices with WFD by the year's end. To be clear, the demo previewed here at MWC is not exactly what will be shipping, as it relies on a frame based buffer to stream images. This creates high lag in several situations, well beyond the 200 ms threshold. The final version will use stripping, potentially reducing lag to under 100 ms, because this would only update portions of the screen which have undergone a change. In theory, this opens the door to smooth playback of fast paced movies and games that require quick reactions.

  • stingray71
    Exciting stuff. Can't wait for it to be mainstream.
  • apache_lives

    no offence to this group but seriously why
  • kyuuketsuki
    apache_livesSTOP F***ING MAKING DIFFERENT STANDARD FFSno offence to this group but seriously whyThe answer to that seems pretty explicit in the article. They found Intel's WiDi lacking. Therefore, they're making their own to overcome the perceived shortcomings. What's the issue?

    I'm more interested in this for playing PC games on the big screen, 1) because my girlfriend likes to watch me play games, and 2) because sometimes the big TV and surround sound are just nicer than my 23" monitor and 2.1 computer desk setup. 'Course, I'd need it to be reasonably priced and have no perceivable lag. Hopefully WFD will deliver.
  • alyoshka
    Good news , is still good news....
  • mrmike_49
    they MAY get it down to 100mS of lag - use HDMI cable, 100mS is just ridiculous
  • madooo12
    apache_livesSTOP F***ING MAKING DIFFERENT STANDARD FFSno offence to this group but seriously whyAs I know, Intel WiDi is exclusive to intel chipsets and stuff
  • anony2004
    Why not work on Wireless Electricity?