18 different digital formats

Discussion in 'Beginners, General Questions' started by Curtis T, Feb 2, 2005.

  1. Curtis T

    Curtis T Extra

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    I have been looking at the 18 different formats for digital television (ATSC) :

    HDTV (6)

    1080p 1080x1920 16:9 Progressive 24 f/s
    1080p 1080x1920 16:9 Progressive 30 f/s
    1080i 1080x1920 16:9 Interlaced 30 f/s
    720p 720x1280 16:9 Progressive 24
    720p 720x1280 16:9 Progressive 30
    720p 720x1280 16:9 Progressive 60


    EDTV (12)

    480p 480x704 16:9 Progressive 24 f/s
    480p 480x704 16:9 Progressive 30
    480p 480x704 16:9 Progressive 60
    480p 480x704 4:3 Progressive 24
    480p 480x704 4:3 Progressive 30
    480p 480x704 4:3 Progressive 60
    480p 480x640 4:3 Progressive 24
    480p 480x640 4:3 Progressive 30
    480p 480x640 4:3 Progressive 60

    SDTV (3)

    480i 480x704 16:9 Interlaced 30 f/s
    480i 480x704 4:3 Interlaced 30
    480i 480x640 4:3 Interlaced 30


    I understand where the 24 frames/sec and 30 frames per/second are coming from (film vs video) what is the 60 frames / second. ?

    Also based on the symmetry of the above chart shouldn't there be a 1080p 16:9 60 frames/sec as well ??
     
  2. Leo Kerr

    Leo Kerr Screenwriter

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    Well, since we've already 60 fields/second in the interlaced formats, why not go whole-hog and go 60 frames/second?

    As to the second point (1080x60p,) yes, that'd be nice... but do you know what sort of data rate you'd need to sustain?!

    Better to say, 4096x2048x24p or something more... reasonable.

    Leo Kerr
     

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