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Apple Pulldown Patent
Hi All
Interesting article from Apple Insider (no – not a rumour, a patent):
https://www.appleinsider.com/article.php?id=3546
“Newly published filings show Apple attempting to patent two important video decoding techniques as well as a scrolling technique that applies both to iPods and a possible keyboard.
Pulldown correction patent
The first and most recent patent, one for a unique method of pulldown correction, would simplify the process of determining the correct editing or playback mode for a given video clip.
By studying multiple frames of a given video, the method would compare differences between the two to judge the technical details of a clip without needing pre-inserted data. It could not only determine the intended frame rate (the common purpose of pulldown conversion) but also whether the source image is interlaced or progressive.
In some cases, the technique could restore the original qualities of a video, Apple says. An algorithm could determine that a video had been de-interlaced and automatically re-apply the effect to avoid problems during video editing.”
Any thoughts? That line about restoring the orginal qualities of a video that has been de-interlaced sounds a bit hopeful to me!
Ben
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12 Replies
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I don’t see how they can patent what high end standards converters have done for ages, along with progressive TV sets etc. They all detect pulldown and remove it based on analysis of the video stream without reference to metadata.
Graeme
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Sounds BS to me.
An algorithm to see if video is progressive or interlaced is not new, nor the ability to detect pulldown.
(ae has it for a long, long time…)
Besides, anyone can see it with their own eyes…And i have no idea how an algorithm could restore interlaced frames from a blended de-interlaced clip.
Now creating an easy setup for Imovie could be the reason, but for serious pro work this totally makes no sense.
Bouke
http://www.videoToolShed.com
smart tools for video pro’s -
Bouke et al
so then why do i have to know my 3:2 cadence when i need to conform a clip in cinema tools, but after effects determines the cadence for me, as well as I versus P.
The only way to determine 3:2 cadence in FCP is with third party plugins, at least as far as i can tell, and maybe i am missing something,
so if apple has to patent a detector, thats OK by me. (anything to helps sort out this format BS!)
right?
“I like video because its so fast!”
Bob Flood
Greer & Associates, Inc. -
[Bob Flood] “so then why do i have to know my 3:2 cadence when i need to conform a clip in cinema tools, but after effects determines the cadence for me, as well as I versus P.”
Bob,
This is a Cinema Tools shortcoming.
But what’s so wrong about having AE do it for you?
Write a simple script, and you can do it in batch.
(Or wait a few weeks, i’ll bring out an AP pulldown remover, if things work out twice as fast as AE…)[Bob Flood] “so if apple has to patent a detector, thats OK by me. (anything to helps sort out this format BS!)”
I don’t think all the different formats are BS. They all server their own purpose. (Not that it’s quite practical, but hey, the more difficult it gets, the more reason for my job.)
Bouke
http://www.videoToolShed.com
smart tools for video pro’s -
It would be freaking useful to have a BUILT IN cadence detection and frame rate conforming tool in FCP.
It’s not a terrible pain to go to After Effects clip by clip on a :30 second spot. But when you’re online editing a 3-30 minute piece from Digibeta it becomes impractical.
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Can understand that…
But i can’t script a FCP plugin for that.What i can do is convert all your clips while maintaining TC / reelname so your project could link to that.
(So first capture all material, then process, then finish)Would that be an option?
Or, isn’t there a hardware card out there that enables you to remove pulldown on ingest? (Would be my option if i lived in NTSC land…)
Bouke
http://www.videoToolShed.com
smart tools for video pro’s -
JES Deinterlacer has been doing it for some time now. At least a year. And it is a free app. I, and many others, have used it successfully for Canon HV20 footage that is 24p.
Gary
Mac Pro 3Ghz Intel Dual Duo, 6GB RAM, 30″ ACD
MacBook Pro 17″
Sony XDCAM EX with a Sachtler Tripod System -
Bouke
“I don’t think all the different formats are BS. They all server their own purpose. (Not that it’s quite practical, but hey, the more difficult it gets, the more reason for my job.)”
I guess its me calling it bs, cuz i look at all this post D1/digibeta era video , both HD and SD, in a different light.
For years we in NTSC had to deal with the oddities of it: 3;2 pulldown, interlace, 59.97 NOT 60.
and when the ATSC started looking around I and many of my colleagues saw it as a chance to Fix TV! make it Better! Make it easier to work with!,
But Nooooo, we had to let the market decide! we had to screw up TV EVEN MORE!!!
and yeah, having different formats for different purposes is ok, just why so freakin many?
alas i end my rant 🙂 thanx for your patience!
“I like video because its so fast!”
Bob Flood
Greer & Associates, Inc. -
Well, if nothing else, the giant crap-mess that are American television standards and formats keeps us engineer minded geeks in business.
Bob is right. It was a golden era, a chance to make clean, simple standards. But it only became exponentially more complicated.
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[Gary Alan] “JES Deinterlacer has been doing it for some time now. At least a year. And it is a free app. I, and many others, have used it successfully for Canon HV20 footage that is 24p.
“I gotta 2nd that. JES can detect cadence breaks and everything. It’s really amazing.
The only time it will not work is if there are very quick edits with different cadences. So if you shoot 24p, edit 29.97, and it has a lot of quick cuts it won’t catch all of them.
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