What is line doubling in a hdtv?

Discussion in 'LCD & LED LCD TVs Forum' started by tyrone burton, Sep 8, 2012.

Tags:
  1. tyrone burton

    tyrone burton

    Joined:
    Aug 5, 2012
    Messages:
    2,193
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    66
    Location:
    Cheshire
    Ratings:
    +105
    I've heard that some tvs, I don't know if all tvs, have to upscale their inputs to the tvs native res by doing something called line doubling. What does it do and is it incorporated in all tvs?
     
  2. noiseboy72

    noiseboy72
    Well-known Member

    Joined:
    Apr 24, 2011
    Messages:
    5,885
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    136
    Ratings:
    +1,684
    Line doubling is old fashioned scaling and was popular in older CRT projectors and big CRT TVs.

    Scaling these days is much more sophisticated as de-interlacing a 576i signal is not just a case of line doubling it, but also removing flicker and scaling it to the resolution of the panel.

    Not something to worry about on modern gear.
     
  3. tyrone burton

    tyrone burton

    Joined:
    Aug 5, 2012
    Messages:
    2,193
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    66
    Location:
    Cheshire
    Ratings:
    +105
    Oh good. Another site was getting me worried lol. So flat screens dont have line doubling, just CRTs?
     
  4. bow79

    bow79
    Active Member

    Joined:
    May 23, 2009
    Messages:
    881
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    28
    Location:
    Leeds
    Ratings:
    +81
    There used to be line quadrupeling if you were rich.
     
  5. tyrone burton

    tyrone burton

    Joined:
    Aug 5, 2012
    Messages:
    2,193
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    66
    Location:
    Cheshire
    Ratings:
    +105
    I believe there was such thing as a HD CRT.
     
  6. bow79

    bow79
    Active Member

    Joined:
    May 23, 2009
    Messages:
    881
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    28
    Location:
    Leeds
    Ratings:
    +81
    The picture improvment now marketed as HQV (i think) I originally saw before they got it on to a chip (different name) sold as a processor for projectors cost £70,000 and that was when £70,000 was £70,000
     

Share This Page

Loading...
  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice