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  #31  
Old 12-14-2012, 09:54 AM
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Quote:
Originally Posted by NewVista View Post
I think this is welcome news given the ubiquity 1080/60i, with even ABC switching to this after a decade of 720p - and maybe this is why: They now have more confidence for artifact-free images now that PsF can be originated from new generation cameras? (It's all done in the camera)
Artifact free? The low temporal resolution at 30 fps will always show artifacts. The artfacts are intentionally hidden with temporal smearing. As spatial resolution rises, so must the temporal resolution.

It is sad that 720p has had such a bad rap since it is capable of conveying higher resolution video than 1080i. Most of the problem stems from poor image rescaling in not only consumer equipment but also broadcast equipment. The point is that if the broadcast chain is properly set up so that production video is oversampled (1080p) and properly rescaled to 720p for delivery and then properly rescaled to 1080p for display, the image will knock the socks off 1080i. Interlace is archaic and it cannot be further condoned. And the temporal refresh rate has been ignored too long: it must be higher than 30 frames per second.

And where did you hear that ABC was departing from 720p? It doesn't make sense ABC going from a higher overall resolution of 720p down to 1080i? Unless it is to overcome the poor engineering practises of many current broadcasters.

Last edited by Penthode; 12-14-2012 at 09:57 AM.
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  #32  
Old 12-14-2012, 10:49 AM
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ABC in a few areas are in fact in 1080i now. For example, in Boston it's 1080i now, and has been for the past couple years.

In my area, it's reported as 720p, but I'll need to double check to see what I'm actually receiving.
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  #33  
Old 12-14-2012, 11:56 AM
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Originally Posted by lnx64 View Post
ABC in a few areas are in fact in 1080i now. For example, in Boston it's 1080i now, and has been for the past couple years.

In my area, it's reported as 720p, but I'll need to double check to see what I'm actually receiving.
Ahh... yes I have seen a number of affiliated stations change. But I expect network origination to maintain 720p until superseded with 1080p. But the issue is moot as linear scheduled over-the-air program distribution is superseded by other methods of delivery.

The important thing to remember is that today's commercialization of video media is through multi-platform delivery. This means the content must at some point be rescaled to another format. Interlace is totally irrelevant and is detrimental to the new world of multi-platform delivery.
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  #34  
Old 12-14-2012, 02:31 PM
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Not sure what latest ABC policy is re-720 but my set indicates local affiliate has switched to 1080.
They must think 1080 looks better for local news & commercials or it could be expedient for equipment standardization.

But since 1080i/60 PsF = 1080/30p (not bad) (no intra-frame motion smear)
I think 720/60p is in trouble
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  #35  
Old 12-14-2012, 10:59 PM
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Originally Posted by NewVista View Post
But since 1080i/60 PsF = 1080/30p (not bad) (no intra-frame motion smear)
Certainly since temporal sampling is not spread over two fields, rescaling should be easier. That is unless adaptive interpolation in convertors recognize as much.

Quote:
I think 720/60p is in trouble
Maybe. Newer 1080p imager cameras rescale to 720p well which brings about substantial improvement in the resolution of the picture. Some of the earlier 720p cameras were really quite bad and made the picture soft.

But it is now late in the game. The broadcasters are now, after many years, entrenched in their formats. Only ABC affiliates are rescaling at emission. I think broadcasters will mostly remain as they are until the next big change to 1080p and beyond.
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  #36  
Old 12-15-2012, 04:57 AM
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Originally Posted by Penthode View Post
.. Newer 1080p imager cameras rescale to 720p well which brings about substantial improvement in the resolution of the picture. .
You raise a good point, how 720 benefits, Kell-factor-wise, because of 2mp cameras & displays at home.
And deriving 60p from same imaging chips (which would also send 30 PsF for 1080 - we hope)
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  #37  
Old 04-19-2014, 10:10 PM
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Just noticed this feature of latest studio camera:

"Newly developed 2/3-inch progressive CCD
Newly developed LSI (16bits A/D)
3G transmission
1080/60p/50p, 1080i/720p and all Psf signal format"
http://pro.sony.com/bbsc/ssr/cat-bro...duct-HDC2000W/

Cool, Psf, definitely the way to go Sony!

Last edited by NewVista; 04-20-2014 at 09:58 AM.
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  #38  
Old 09-21-2022, 11:22 PM
DVtyro DVtyro is offline
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Regarding PsF. Below is a page from the user manual from my 1999 JVC DV camcorder.

Here is a video about this camcorder with samples of 30PsF, which, as Wikipedia entry points out, was not called "PsF" when applied to SD video, it was simply called "progressive scan".

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