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4.1.1 versus 4.2.2

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Larry Watts
4.1.1 versus 4.2.2
on Apr 6, 2010 at 4:29:23 pm

I'm trying to get the highest quality signal for our broadcast TV program without spending millions.

We shoot with JVC 250U cameras SDI out in either standard def or HDV 720P

We edit with FCP off our media server.

We presently use a Sony DSR 1800 A DVCam deck which is 4:1:1 at 25 mbps.
And a DSR 1000A hard disc recorder DVCam

A broadcast Pix switcher.

How much improvement would I see if we could record say XDCam at 4:2:2? at 50mbps?

Thanks


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Dave LaRonde
Re: 4.1.1 versus 4.2.2
on Apr 6, 2010 at 4:59:02 pm

[Larry Watts] "How much improvement would I see if we could record say XDCam at 4:2:2? at 50mbps? "

Not much to the naked eye, but any unavoidable re-rendering will look much better, and chroma keying will be lots easier.

Dave LaRonde
Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA


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Larry Watts
Re: 4.1.1 versus 4.2.2
on Apr 6, 2010 at 7:08:55 pm

Actually, what is really driving this is how much difference will the end result be on Time Warner, Dish Network and Direct TV?

If the signal path starts at 50mbps in XDCam 4:2:2 versus 25mbps in DVCam 4:1:1 then edited in FCP then we make station masters in DVCam or Betacam SP will it stay cleaner through the heavy compression it receives at TW, DN, and DTV?

And finally, what will we see if we shoot in 720P?

Ours is a talk show with not a lot of action.

Thanks



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Dave LaRonde
Re: 4.1.1 versus 4.2.2
on Apr 7, 2010 at 4:59:44 pm

[Larry Watts] "....what will we see if we shoot in 720P?"

A much better-looking picture, that's what. I presume you're talking about shooting 720p 59.94, AKA 720p 60.

Almost every good capture card -- e.g. Blackmagic, AJA -- can turn this HD video directly into 29.97 interlaced SD for you when you make the masters. They'll even give you a choice between centerpunch or letterbox.

Don't have a good capture card? Suffer the consequences. They're the easiest and best way to record good-looking HD video onto SD tape.

Dave LaRonde
Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA


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John Heagy
Re: 4.1.1 versus 4.2.2
on Apr 24, 2010 at 2:05:37 am

Given that all digital broadcasts are 4:2:0 if you start with 4:1:1 you end up with 4:1:0


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