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WiDi and WiHD

Discussion in 'Alienware 17 and M17x' started by Cloudfire, Mar 19, 2011.

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  1. Cloudfire

    Cloudfire (Really odd person)

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    There seems to be a lot of confusion about these two technologies, so i figured i write the differences between the two.

    WiDi is Intel`s solution to transfer data from the laptop to a TV.
    With this technology you use the IGP of either i3, i5 or i7 CPUs (those with an IGP) to display things on the TV. And to actually transfer the data from your laptop to the reciever, you will need a Wireless card. Wireless-N 1000, Intel Advanced 6200/6230, Intel Ultimate-N 6300 is cards that is able to transfer the data. You will also need a software which i don`t know the name of to run it all from your laptop. And at last you will need a reciever by the TV. The only manufaturer i know of that makes these are Netgear. You have two different types. 1: Push2TV which can recieve and output up to 720p. 2. Push2TV HD which can recieve and output up to 1080p.
    i3, i5 and i7 1st gen can only manage to get up to 720p on the TV. i3, i5 and i7 2nd gen up to 1080p.
    According to Intel all laptops that are compatible with this technology have this marked on them
    [​IMG]
    And here is a list of laptops that is compatible. ptv_supportedlaptops_usa No alienware is on this list for some reason. Probably because they are not bundled with the software. M17x R3 have all the requirements filled. NB: You cannot use the M17X R3 versions with 120 Hz (3D) screen with WiDi because the IGP is disabled and WiDi relays on the IGP to display things on the TV.

    WiDi 1.0 supported streaming up to 720p and you had to watch the same on the laptop screen as you did with the TV. No multitasking available.
    WiDi 2.0 supports up to 1080p and you can stream video/music etc to the TV while at the same time do whatever you want with the laptop.

    WiHD on the other hand is also a technology to stream data from the laptop to your TV. It is made by a whole bunch of electronic companies, and it is a direct competitor to Intel`s solution, which is? Yes WiDi (Do not forget this now). WiHD is also available for Bluray players, Cameras, audio equipment to stream data to TVs wireless, not just from laptops to TV.
    Ok that said, the requirements for this technology is:
    You need a transmitter AND a reciever. According to the manual and the part list, M17x R3 will later have the option to add-on a SiBEAM WiHD card which acts as the transmitter. It is not included today. Here is a video of a guy testing it out
    YouTube - Alienware M17x WiHD Demonstration
    Anyhow, you can buy WiHD kits to be able to stream data from the laptop to the TV for those who do not have add-ons like the WiHD card. Here there are several options available. From big boxes to small USB plugs. Here is a few kit examples:
    IOGEAR Wireless HD Kit GWAV8141K Review
    IOGEAR - GUWAVKIT2 - Wireless HD Computer to TV Kit
    The first one supports video streaming up to 1080p while the last one only up to 720p. Some new HDTVs today have an integrated reciever so you won`t need a reciever, only a transmitter. Probably the benefit of having many big electronic companies working together to incorporate this technology.
    With WIHD you can also do other stuff with your laptop while streaming data to the TV.

    The difference between WiDi and WiHD is that WiDi use the Intel wireless cards to transmit the data from the laptop to the TV, while WIHD use a transmitter to transfer the data.
     
  2. ir0nman1

    ir0nman1 Notebook Enthusiast

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    A couple more big differences are that WiHD does not have the lag that WiDi does, it could potentially be used for gaming etc. WiHD uses the 60 GHz band for transmitting so there is no chance for interference from your existing electronics equipment, however the WiDi receivers are much cheaper from what I have seen.
     
  3. Cloudfire

    Cloudfire (Really odd person)

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    You are correct. From what i have read the lag of WiDi 1.0 was around 1 second while Widi 2.0 the lag is now about 1 millisecond. Will probably be bad for people playing FPS on the TV, but for movies etc it doesn`t matter.
     
  4. Azureal

    Azureal Notebook Consultant

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    That's some great information Cloudfire, thanks for sharing. I wonder if for WiDi on an R3 if you get the software with the receiver?

    Although given the info ir0nman1 provides, it would not be of use for much other than watching BD content. I have a BD player for that.
     
  5. VoiceInTheWilderness

    VoiceInTheWilderness Notebook Consultant

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    Cloudfire,

    I didn't know anything about these technologies until your post here. I have an R2, which to my knowledge has nothing of these technologies installed/supported anywhere. It is my understanding that in a sense, these capabilities would take the place of plugging an HDMI cable from your laptop to an HDTV, right? Are they intended to do the same for a computer monitor in general? How do they square with DisplayPort and monitors that support that (as nearly all eventually will)?
     
  6. ir0nman1

    ir0nman1 Notebook Enthusiast

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    well WiDi can be used for more then BD content, what about playing youtube, streaming content from amazon etc... there could be some good reasons for it. I never use Youtube on my BD player because of the lack of keyboard etc. but honestly since I don't think anyone has seen either of these technologies outside of CES and other demos we will have to have someone test and report here to get a better idea.

    I'm looking forward to both, and knowing that the R3 is suppose to support both is exciting for me as I'm sure prices on the WiHD will eventually and then I can pick whichever one seems to be the better tech.
     
  7. VoiceInTheWilderness

    VoiceInTheWilderness Notebook Consultant

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    I just prowled around Wikipedia and read about WiDi and a similar system, Wireless Home Digital Interface. Both this and WiDi/WiHD are very new standards for wireless display connections. I can imagine they will continue to evolve into completely wireless solutions for connecting displays and HDTVs, but it seems that they are very immature right now and there may still be a bit of a "format war" yet to be fought out before we will know exactly what it all means. I love watching the fits and starts of technology evolution! It is never a straight path, but much more of an obstacle course.
     
  8. Azureal

    Azureal Notebook Consultant

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    Great point, I just found out that my Amazon Prime allows me to access over 5000 streaming videos for free. There is also subscription Netflix.

    Also, I just saw your post about the WiDi v2.0 having a delay of only 1 millisecond which could be usable for general computing.

    Is the WiHD the only of the two technologies which allows a different display on the laptop screen vs. the wireless monitor?

    Currently, when I extend a desktop to the big-screen via HDMI, I cannot take focus away from the full-screen streaming content or it stops playing.
     
  9. Geoffxx

    Geoffxx Notebook Evangelist

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    it seems the intel 6300 network card has the ability to stream both these technologies
     
  10. Cloudfire

    Cloudfire (Really odd person)

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    Yes WiDi and WIHD are almost the exact same as using a looong HDMI cable from your laptop right in to the TV. But everything is wireless :)
    The recievers and transmitters with WiHD have different range in different kits, they all need to be in the same room. Some have 32 feet, some 100 feet. I have no idea of the range with WiDi but i have read about a test where they managed to put the laptop 90 feet from the reciever by the TV and still work. Also there you will have to be in the same room with the laptop and reciever.

    Your R2 will not be able to use the WiDi because it has the i7 940XM with no IGP. But you can still use WiHD if you get the kit.
    I don`t know about DisplayPort and its compability with these two technologies. If i should guess, yes it would work as long as you get a displayport to HDMI adapter. But i am not 100% shure. :)
     
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