/ Register

who says no 1080P broadcasts soon?

Discussion in 'XStreamHD (Closed Forum)' started by projectorguru, Nov 20, 2007.

Page 2 of 2
  1. Dec 14, 2007 #21 of 27
    skwayb

    skwayb New Member

    7
    0
    Jan 10, 2006
    I is for interlace so only the even number of 1920x540 lines are sent in one 1/60th of a second and then the odd number of 1920x540 lines are sent in the next 1/60th of second. Not all 1920x1080 are sent at one time. So half the bandwidth is needed for a 1080i vs 1080p image.

    This explains it better.

    http: //techdigs.net/content/view/53/42/
     
  2. Dec 14, 2007 #22 of 27
    John in Georgia

    John in Georgia Godfather

    317
    0
    Sep 24, 2006
    Wonder why this isn't being "unveiled" at the National Association of Broadcasters (NAB) instead of at the Consumer's Electronics Show (CES)?
     
  3. Dec 14, 2007 #23 of 27
    Stewart Vernon

    Stewart Vernon Roving Reporter Staff Member Super Moderator DBSTalk Club

    21,627
    396
    Jan 7, 2005
    Kittrell, NC
    Your question is incomplete.

    1080p at 30 fps would be exactly the same as 1080i at 60 fps (since the interlaced frames are half the image)... but this isn't the only kind of 1080p.

    The spec also has 1080p at 24 fps, which actually would be less bandwidth than 1080i... so that could be done with the current technology and space if they wanted to for films.

    But the folks who want 1080p really are wanting 1080p at 60 fps... which would be twice the available/current bandwidth of 1080i at 60 fps... and that cannot be done at all via OTA. Via satellite/cable it could be done, but would cut by half the bandwidth available for channels.
     
  4. Dec 14, 2007 #24 of 27
    HIPAR

    HIPAR Icon

    749
    0
    May 15, 2005
    That makes sense.

    --- CHAS
     
  5. Dec 14, 2007 #25 of 27
    P Smith

    P Smith Mr. FixAnything

    25,669
    478
    Jul 25, 2002
    W.Mdtrn Sea
    That's old mode - 1080p60, now with new 120 Hz HD TV we want 1080p120 ! :)
     
  6. Dec 15, 2007 #26 of 27
    soloredd

    soloredd Legend

    100
    0
    Oct 21, 2007
    Blah.

    Good luck to these people staying afloat. HD customers in the overall picture account for very little. Those who are coming into HD see a huge difference from SD to HD but to expect them to then go from 720p/1080i to 1080p and find it worth it?? HA!

    1080p should have been started from the get-go. In my opinion, it's too late to start pushing it out now. The next gen of high-definition programming will come along.
     
  7. Dec 15, 2007 #27 of 27
    Stewart Vernon

    Stewart Vernon Roving Reporter Staff Member Super Moderator DBSTalk Club

    21,627
    396
    Jan 7, 2005
    Kittrell, NC
    I agree with you on that point. I wish the OTA folks had gotten together and with the frequency changes and all with some of the spectrum being sold in a couple of years.. I wish that they had also taken the opportunity to re-define the channel bandwidth for digital OTA, so that in 2009 they could switchover and have more bandwidth per channel to be able to broadcast 1080p at 60 fps if needed.

    It's also a shame, but nothing we can do about it at this point... that MPEG2 is locked into ATSC because with MPEG4 OTA could perhaps squeeze more in there too... but so many people would be stuck with non-MPEG4 HDTVs with built-in tuners that it would be a nightmare. So while satellite and cable can shift to MPEG4 for better bandwidth usage, OTA will be stuck with MPEG2 for the long haul.
     
Page 2 of 2

Share This Page

spam firewall