HDTV question.

Discussion in 'General Hardware' started by iceman7311, Jul 1, 2006.

  1. iceman7311

    iceman7311 OSNN Senior Addict

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    can someone explain this to me.

    http://en.wikipedia.org/wiki/1080i

    wikipedia defines 1080i as a interlaced HDTV format with 1080 vertical pixels and 1920 horizontal pixels to to form a 16:9 screen ratio.

    well that is all good and what not, but when i go to the popular electronics website you all may know as "the egg", click on a random advertised 1080i HDTV and i notice it has no where near 1080x1920 resolution.

    http://www.newegg.com/Product/Product.asp?Item=N82E16824206055


    can someone explain this to me?
     
  2. Luna

    Luna OSNN Senior Addict Folding Team

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    Most TV's, as far as I am aware, can't hit 1920x1080. They will probably downscale it into a resolution that is still above DVD, but not true 1080p. Then again I could be wrong.

    If you want a TV that can hit 1920x1080, expect to pay at least 1000$ more for it over a standard HDTV.

    Example:

    Samsung HL-R6167W - 1280 x 720
    Samsung HL-R6168W - 1920 x 1080
     
  3. fitz

    fitz Just Floating Along Staff Member Political User Folding Team

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    you'll also note that it says "recommended resolution" of 1280x720 (this is actually the 720p signal). It is *probably* capable of pushing a 1080i signal, it's just the recommended resolution is the 720p setting.

    but, as mentioned, true HD standard resolution (ie: if you were to go for an HD-DVD or blueray) would start with a 1080p signal.

    edit: This link is a little outdated, but it does describe some of the differences between 1080i and 720p signals and resolutions. It doesn't go into 1080p since at the time the article was written (Jan of 2005) there weren't that many consumer level devices that could do 1080p sucessfully.
     
  4. ming

    ming OSNN Advanced

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    At the moment, I dont think ANY retailers can show their demo TVs in the theoretical 1920x1080 resolution as their TV sets are connected either via RF aerial or component leads (well they are in my store). Secondly, it might be that they're simulating the pictures from a server like we are in our store as there are no HD broadcast freely available without special subscriptions AND HD receivers.
     
  5. rushm001

    rushm001 In the beginning...... Political User

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    You think sky would let shops have a free "demo" channel to help them plug HD. Would help the uptake!
     
  6. SPeedY_B

    SPeedY_B I may actually be insane.

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    Well HD-DVD and BluRay are available if shops wish to preview true HiDef quality images.

    Also, freeview will soon (soon? eventually? next decade? :p) be adding hidef channels to it's line up, and most new TV's have integrated digital receivers to show it off :)
     
  7. ming

    ming OSNN Advanced

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    lol... UK gov won't switch off analogue signal til around 2012.
     
  8. SPeedY_B

    SPeedY_B I may actually be insane.

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    Telewest are already broadcasting world cup games in HD, the BBC ran a trial with one game, and will be broadcasting the final in HD... apparently.

    It shouldn't be too long before we get HD available to us.
     
  9. fitz

    fitz Just Floating Along Staff Member Political User Folding Team

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    depending where you live in the US, you can pull 1080i and/or 720p broadcasts over the air with a good antenna for free
     
  10. iceman7311

    iceman7311 OSNN Senior Addict

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    but the question still stands, does that tv physically have 1920x1080 pixels?
     
  11. ming

    ming OSNN Advanced

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    I personally think LCD TVs currently can't reach that sort of resolution... in fact, I think the current resolution for a normal TV broadcast is between 800x640 or 1024x768 - might be wrong on that.
    But can PC 20" TFTs can reach 1920x1600? :)
     
  12. LeeJend

    LeeJend Moderator

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    No, almost all do not. All the TVs on the egg are 1366 or 1280 (or even less).

    They display 1920 by extrapolating (engineer speak for make a wild ass guess at it). That makes for a smeared display.

    HDTV is an advertising slogan to the TV industry. Anything over 512x256 interlaced (old TV standard) is technically high definition so they adlib with no fear of litigation.

    What you want is a display with the same native resolution as the broadcast (or DVD signal). If you don't get native resolution matched smearing is a very real possibility. Wait for HDTV to mature before spending any bucks on it. That could take another 4 years.
     
  13. iceman7311

    iceman7311 OSNN Senior Addict

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    Last edited: Jul 2, 2006
  14. drz01

    drz01 Weekend DJ

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    Some top line LCD's are true 1920*1080 resolution. I own one so I know they exist. The only source that outputs this full resoution are computer graphic cards, HD-DVD or Blue Ray. Here is a previous thread about my TV/Monitor
    http://forum.osnn.net/showthread.php?t=82023
     
  15. iceman7311

    iceman7311 OSNN Senior Addict

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    here i will start a new thread giving the whole story.
     
  16. iceman7311

    iceman7311 OSNN Senior Addict

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    you have a kick ass tv drz but that is just out of my price range
     
  17. falconguard

    falconguard Carbon based lifeform Political User Folding Team

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    You might want to get one that has either HDMI or dvi inputs, although these are not fully utilized right now they have the bandwidth to grow with the HD curve. Not having these on a tv will limit your future HD whether on Blu-ray or HD-dvd.
     
  18. iceman7311

    iceman7311 OSNN Senior Addict

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    on the rca is says it has 1080 vertical scanning lines so doesn't it have to have 1920 horizontal scanning lines so is would have a resolution of 1080x1920?
     
  19. LeeJend

    LeeJend Moderator

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    ROFLMFAO. Ok, so I'm reading up on the RCA to see if it actually does 1920x1080 (I never found a positive answer, the manual only talks about the HDTV standard, not what the TV actually does). The egg lsiting says HDTV compatible but lists a lower actual pixel size. It must be processing the 1920 into the 1280 the screen displays.

    BUT, Walmart lists the TV for $894 vs the $1199 at the egg.

    http://www.walmart.com/catalog/product.do?product_id=3757031

    You'll save a bundle on shipping the 155 lbs TV too.
     
  20. iceman7311

    iceman7311 OSNN Senior Addict

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    that is way out of my pricew range a am looking at a tv that 500 would be the max.



    edit: also in the specs for the rca it says its max resolution is 1080i. for whatever thats worth. i have a feeling the only way to know for sure would be to buy the tv and try it out :(
     
    Last edited: Jul 3, 2006