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Activity Forums AJA Video Systems Educate me please. 4:4:4 Dual Link HD vs ???

  • Educate me please. 4:4:4 Dual Link HD vs ???

    Posted by Michael J c on April 21, 2005 at 5:17 pm

    Could someone give me a quick explanation of what makes 4:4:4 HD desirable over a single link (4:4:2?) HD?

    What is the advantage of this, and where would it be noticeable in quality? Also, is there a quantifiable difference between the Kona2 HD card and the Media 100HD card? I know that M100HD is not dual link (but don’t know if that matters)… I know that the Kona2 cannot reposition an HD center extraction (not too big of a deal, you could just reposition in FCP and do a sepearte output)… Is it true that you cannot mix resolutions in the FCP timeline without rendering (using Kona2 captured media)? That last one seems like a deal breaker…

    Thanks for any info on this. I have a new M100 HD card but haven’t set it up yet. I am just debating on whether or not I can justify a “quality” reason for getting the Kona2 card and using FCP more often… I know FCP has way more software bells and whistles than Media 100, but that is a secondary factor for me. I just need a rock solid stable broadcast quality solution and prefer to “troubleshoot” as little as possible. Thanks!

    Gary Adcock replied 21 years, 1 month ago 3 Members · 4 Replies
  • 4 Replies
  • John Ladle

    April 21, 2005 at 6:13 pm

    the advantage of this is FILM. digital intermediary to film. and you can always downconvert to broadcast.

    i believe sony explicitly stated this is a film replacement technology.

  • Gary Adcock

    April 22, 2005 at 3:27 pm

    Could someone give me a quick explanation of what makes 4:4:4 HD desirable over a single link (4:4:2?) HD?

    Dual Link requires 2 things Currently – an SR Series HD cam Deck or a device that can generate the Dual LInk Signal like the Viper And Huge amounts of REALLY REALLY high speed storage. AS stated before that is meant to be film replacement. According to the AJA data rate calc that signal requires Drives that need to capture the 1920×1080 Progressive RGBA signal at 23.98 is over 200 mgs per second. and NOTHING is in realtime.

    @ 60fps we are talking about data rates near 497 megs a second (that is NOT a Typo)

    The Reality here is that there are very very few people that currently have access to this hardware, I have been told there are currently less than 100 of the decks in the US. (correct me if this is inaccurate)

    gary adcock

    Studio37
    HD and Film Consultation

  • Michael J c

    April 22, 2005 at 9:12 pm

    Ouch! Thanks for the explanation Gary. It is odd that they include this functionality on the AJA card… It seems like those who *need* it would have much bigger/expensive solutions already.

    Thanks again!

  • Gary Adcock

    April 22, 2005 at 11:23 pm

    It is odd that they include this functionality on the AJA card… It seems like those who *need* it would have much bigger/expensive solutions already.

    Not really AJA, is looking at the one area that offers the greatest needs in new technology, the feature film community,
    and when pushing the high end of any technology it allows the “cool new features” to flow down to us mere mortals.

    SONY has dictated that all of the trailers and DI for their movies will be done in this format. just staying ahead of the curve with real products and real solutions.

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