DVD movie in 2.35:1 aspect ratio

Discussion in 'DVD Video' started by joel, Jan 30, 2004.

  1. joel

    joel Guest

    Hi,

    Most movie have a 2.35:1 aspect ratio and black bars are
    added in the top and bottom to reach a 16:9 aspect ratio.
    These black bars are really encoded in the mpeg bitstream,
    so this waste bits on the disk !

    Is there any DVD really encoded in 2.35:1 format ?

    Black bars could be added by the DVD player to reach a
    16:9 or 4:3 aspect ratio (in the same way 16:9 movies are
    converted to 4:3 by the player for display on 4:3 TV set)

    joel
     
    joel, Jan 30, 2004
    #1
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  2. since the black bars are still and unchanging they waste very little
    bits. You don't want the DVD player to perform any type of
    down-conversion since this causes artifacts in the picture (as what is
    caused when DVD players downconvert 16:9 to non anamorphic capable TV's)
     
    Michael Rogers, Jan 30, 2004
    #2
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  3. joel

    jagu Guest

    : Hi,
    :
    : Most movie have a 2.35:1 aspect ratio and black bars are
    : added in the top and bottom to reach a 16:9 aspect ratio.
    : These black bars are really encoded in the mpeg bitstream,
    : so this waste bits on the disk !
    :
    : Is there any DVD really encoded in 2.35:1 format ?
    :
    : Black bars could be added by the DVD player to reach a
    : 16:9 or 4:3 aspect ratio (in the same way 16:9 movies are
    : converted to 4:3 by the player for display on 4:3 TV set)

    I don't think the 2.21:1 flag of MPEG2 is supported by the DVD
    specs so probably no such discs exist.


    Jag
     
    jagu, Jan 30, 2004
    #3
  4. joel

    Rich Clark Guest

    This would only make sense if you had a 2:35 display. If you do, you built
    it yourself.

    RichC
     
    Rich Clark, Jan 30, 2004
    #4
  5. No. The DVD Spec only supports material mastered at 4:3 and 16:9.
    Other ratios (such as 2.35:1) must be letterboxed.
     
    Aaron J. Bossig, Jan 30, 2004
    #5
  6. joel

    John Savard Guest

    Not many, though, because video compression is used that eliminates
    the black bars because they contain no information.
    No; the DVD format only allows 1.78:1 and 1.33:1 to be recognized.

    John Savard
    http://home.ecn.ab.ca/~jsavard/index.html
     
    John Savard, Jan 31, 2004
    #6
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