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June 25th, 2007, 05:09 AM
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#1 |
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Major Player
Join Date: Oct 2004
Location: London, UK
Posts: 243
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How does HD-Link de-interlace 50i to 25p?
Hi there,
How does HD-Link de-interlace 1080/50i to 1080/25p? Does it simply throw away one field? Or does it use smart motion-compensation like AviSynth's MVbob and then somehow halve the framerate? My overall question is: Can I make video shot as 1080/50i look "almost like" video shot 1080/25p? Is HD-Link's de-interlace routine higher quality than PPro 2.0's? Many thanks, Jack |
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June 25th, 2007, 09:16 AM
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#2 |
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CTO, CineForm Inc.
Join Date: Jul 2003
Location: Cardiff-by-the-Sea, California
Posts: 8,095
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Try it out for yourself. It doesn't drop fields, it uses both to extract the best vertical resolution.
__________________
David Newman -- web: www.gopro.com blog: cineform.blogspot.com -- twitter: twitter.com/David_Newman |
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June 25th, 2007, 09:26 AM
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#3 | |
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Major Player
Join Date: Oct 2004
Location: London, UK
Posts: 243
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Quote:
When you say "it uses both to extract the best vertical res" does that mean that it blends and averages the two fields (i.e. that it produces ghosting)? I will try it out myself one day soon but today I'm pretty busy. Many thanks, Jack |
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June 25th, 2007, 10:08 AM
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#4 |
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CTO, CineForm Inc.
Join Date: Jul 2003
Location: Cardiff-by-the-Sea, California
Posts: 8,095
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Not quite, but there is typically more ghosting in algorthms that use both fields, just as there is typically more resolution. Ghosting = motion blur if your source shutter was 1/50th sec, this is the ideal side-effect if you have to have one.
__________________
David Newman -- web: www.gopro.com blog: cineform.blogspot.com -- twitter: twitter.com/David_Newman |
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June 25th, 2007, 10:22 AM
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#5 |
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Major Player
Join Date: Oct 2004
Location: London, UK
Posts: 243
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OK, thanks loads for the reply!
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June 25th, 2007, 03:06 PM
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#6 |
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Major Player
Join Date: Nov 2005
Location: Belgium
Posts: 695
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Today I had to deinterlease animated footage with fast moving arrows. DV 50i to be played on a computer. It looked ugly, even after loading into premiere.
The HDlink does an ultimate job on it. I had arrows moving so fast it created interlease lines all over the image. Now I see arrows appearing after conversion. Real good job. I'll create some stills if I have the time tomorrow. Marc |
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