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  1. #1
    Suspended Smokey's Avatar
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    Quote Originally Posted by pixelthis
    As for broadcasting at 24 fps, that probably wont happen, because you'd need a set that could handle it at the decoder stage, or a seperate tuner to feed a 24fps into an HDMI input, a lot of bother, really.
    My concern was since 1080p Tvs convert all of their input signal (1080i) to its native resolution (1080p) , does any information get lost in the field or frame of image in the upconversion process?

    I am asking this question because 1080i only produce 60 even and odd field per second (30 full frame persecond), while 1080p produce 60 full frame persecond.

  2. #2
    Forum Regular pixelthis's Avatar
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    Cool

    Quote Originally Posted by Smokey
    My concern was since 1080p Tvs convert all of their input signal (1080i) to its native resolution (1080p) , does any information get lost in the field or frame of image in the upconversion process?

    I am asking this question because 1080i only produce 60 even and odd field per second (30 full frame persecond), while 1080p produce 60 full frame persecond.
    Thats the great thing about 1080i broadcast.
    It was intended to be the main format, indeed, I have had several 1080i sets, but
    with the advent of 1080p sets you get a monumental increase in q without any
    cost.
    Its like the boost in q you get from a DVD, deinterlacing 480i to 480p.
    THERE IS NO "UPCONVERSION", so you are not dependent on how good a processing
    chip you have, you just have to take 30 alternating frames(interlaced) and stiche them
    together.
    And you get a 1080p picture pure from the broadcaster, now, its broadcast as a 1080i,
    but even so the pic is still a lot closer to the BLU standard.
    I don't know if broadcasting in 24 fps would work, doubt it.
    Most 1080p sets that take 24fps take it from the HDMI input.
    It would take an infrastructure change to broadcast at anything other than 60hz.
    120 hz sets get there 120 by chicanery, there picture depending on whatever magic chip
    resides in their innards.
    Even so, I THINK 120 HZ IS worth it, I have seen several, and the q is there, and when
    laymen shopping with their wives tell you they can see the difference...well!
    Dont know about 240, seems to be pushing it a bit.
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  3. #3
    M.P.S.E /AES/SMPTE member Sir Terrence the Terrible's Avatar
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    Quote Originally Posted by pixelthis
    Thats the great thing about 1080i broadcast.
    It was intended to be the main format, indeed, I have had several 1080i sets, but
    with the advent of 1080p sets you get a monumental increase in q without any
    cost.
    1080i and 1080p have the same information, it is just presented differently so there is no monumental increase in quality. 1080p is just 1080i deinterlaced. Nothing more is added during deinterlacing. Your television just weaves the sequential frames together to form one single field simultaneously.

    I thought you knew everything about televisions? Or not........
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  4. #4
    Suspended Smokey's Avatar
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    Quote Originally Posted by pixelthis
    THERE IS NO "UPCONVERSION", so you are not dependent on how good a processing chip you have, you just have to take 30 alternating frames(interlaced) and stiche them together. And you get a 1080p picture pure from the broadcaster, now, its broadcast as a 1080i.
    Quote Originally Posted by Sir TT
    All you are doing is combining the sequential frames( you are not upconverting anything) from 1080i(the two seperate fields of information) into one 1080p frame. The television receives the first field and holds it while waiting for the other frame to show. Some earlier televisions just line doubled a single field and didn't really combine the two fields of information.
    Thanks guys.

    So basically there is no need for 1080p broadcasting if TV deinterlaced 1080i signal to 1080p. I am guessing it will look as good as 1080p broadcasting.

  5. #5
    M.P.S.E /AES/SMPTE member Sir Terrence the Terrible's Avatar
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    Quote Originally Posted by Smokey
    Thanks guys.

    So basically there is no need for 1080p broadcasting if TV deinterlaced 1080i signal to 1080p. I am guessing it will look as good as 1080p broadcasting.
    With good processing, you would be hard pressed to tell the difference between 1080i and 1080p. So no, there is no reason to broadcast in 1080p
    Sir Terrence

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  6. #6
    M.P.S.E /AES/SMPTE member Sir Terrence the Terrible's Avatar
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    Quote Originally Posted by Smokey
    My concern was since 1080p Tvs convert all of their input signal (1080i) to its native resolution (1080p) , does any information get lost in the field or frame of image in the upconversion process?


    ] I am asking this question because 1080i only produce 60 even and odd field per second (30 full frame persecond), while 1080p produce 60 full frame persecond.
    All you are doing is combining the sequential frames( you are not upconverting anything) from 1080i(the two seperate fields of information) into one 1080p frame. The television receives the first field and holds it while waiting for the other frame to show. Some earlier televisions just line doubled a single field and didn't really combine the two fields of information.
    Sir Terrence

    Titan Reference 3D 1080p projector
    200" SI Black Diamond II screen
    Oppo BDP-103D
    Datastat RS20I audio/video processor 12.4 audio setup
    9 Onkyo M-5099 power amp
    9 Onkyo M-510 power amp
    9 Onkyo M-508 power amp
    6 custom CAL amps for subs
    3 custom 3 way horn DSP hybrid monitors
    18 custom 3 way horn DSP hybrid surround/ceiling speakers
    2 custom 15" sealed FFEC servo subs
    4 custom 15" H-PAS FFEC servo subs
    THX Style Baffle wall

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